Cosca, Michael A., Rouse, Roland C., Essene, Eric J. (1988) Dorrite [Ca2(Mg2Fe3+4)(Al4Si2)O20], a new member of the aenigmatite group from a pyrometamorphic melt-rock. American Mineralogist, 73 (11-12) 1440-1448

ⓘ 'Garnet Group'

Formula: X₃Z₂(SiO₄)₃

Locality: Big-B Mine, Johnson County, Wyoming, USA

References:

www.stormme56.vcn.com (n.d.) http://www.stormme56.vcn.com/

ⓘ Gypsum

Formula: CaSO₄ · 2H₂O

Localities:

I90 roadcut, Buffalo, Johnson County, Wyoming, USA
Gardiner Mountain, Mayoworth, Johnson County, Wyoming, USA

ⓘ Gypsum var. Alabaster

Formula: CaSO₄ · 2H₂O

Locality: Gardiner Mountain, Mayoworth, Johnson County, Wyoming, USA

References:

Hausel, W. Dan (2000) Gemstones And Other Unique Minerals And Rocks Of Wyoming: A Field Guide For Collectors. Bulletin 71. Wyoming Geological Survey

ⓘ Gypsum var. Selenite

Formula: CaSO₄ · 2H₂O

Locality: I90 roadcut, Buffalo, Johnson County, Wyoming, USA

References:

Odum, J.K., Hauff, P.L., Farrow, R.A. (1982) A new occurrence of ammoniojarosite in Buffalo, Wyoming. The Canadian Mineralogist: 20: 91-95.

ⓘ Hematite

Formula: Fe₂O₃

Locality: Healy Coal seam, Buffalo, Johnson County, Wyoming, USA

References:

AmMin 72:137

ⓘ 'Hornblende Root Name Group'

Formula: ◻Ca₂(C²⁺₄C³⁺)(AlSi₇O₂₂)W₂

Locality: Big Horn Mine (Powder River Mine), Johnson County, Wyoming, USA

ⓘ Jarosite

Formula: KFe³⁺₃(SO₄)₂(OH)₆

Localities:

Sad Sack Claim, Johnson County, Wyoming, USA
Kell Roy No. 3 Occurrence, Johnson County, Wyoming, USA

ⓘ Magnesioferrite

Formula: MgFe³⁺₂O₄

Locality: Healy Coal seam, Buffalo, Johnson County, Wyoming, USA

References:

AmMin 72:137

ⓘ 'Melilite Group'

Formula: Ca₂M(XSiO₇)

Locality: Healy Coal seam, Buffalo, Johnson County, Wyoming, USA

References:

AmMin 72:137

ⓘ Metatyuyamunite

Formula: Ca(UO₂)₂(VO₄)₂ · 3H₂O

Locality: Lode No. 1 Occurrence, Mayoworth, Johnson County, Wyoming, USA

References:

USGS: Geological Survey Circular 358

ⓘ Native Gold

Formula: Au

Localities:

Kelly Creek, Johnson County, Wyoming, USA
Big Horn Mine (Powder River Mine), Johnson County, Wyoming, USA

ⓘ Pyrolusite

Formula: Mn⁴⁺O₂

Locality: Irvine Ranch Area Occurrence, Johnson County, Wyoming, USA

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Quartz

Formula: SiO₂

Localities:

Healy Coal seam, Buffalo, Johnson County, Wyoming, USA
Irvine Ranch Area Occurrence, Johnson County, Wyoming, USA
Big Horn Mine (Powder River Mine), Johnson County, Wyoming, USA

ⓘ Tridymite

Formula: SiO₂

Locality: Healy Coal seam, Buffalo, Johnson County, Wyoming, USA

References:

AmMin 72:137

ⓘ Tyuyamunite

Formula: Ca(UO₂)₂(VO₄)₂ · 5-8H₂O

Locality: Kell Roy No. 3 Occurrence, Johnson County, Wyoming, USA

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

ⓘ Uraninite

Formula: UO₂

Locality: Kell Roy No. 3 Occurrence, Johnson County, Wyoming, USA

References:

(2005) Mineral Resources Data System (MRDS), US Geological Survey.

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
ⓘ	Native Gold	1.AA.05	Au
Group 2 - Sulphides and Sulfosalts
ⓘ	Chalcocite	2.BA.05	Cu₂S
Group 4 - Oxides and Hydroxides
ⓘ	Cuprite	4.AA.10	Cu₂O
ⓘ	Magnesioferrite	4.BB.05	MgFe³⁺₂O₄
ⓘ	Hematite	4.CB.05	Fe₂O₃
ⓘ	Quartz	4.DA.05	SiO₂
ⓘ	Tridymite	4.DA.10	SiO₂
ⓘ	Cristobalite	4.DA.15	SiO₂
ⓘ	Pyrolusite	4.DB.05	Mn⁴⁺O₂
ⓘ	Uraninite	4.DL.05	UO₂
ⓘ	Carnotite	4.HB.05	K₂(UO₂)₂(VO₄)₂ · 3H₂O
ⓘ	Metatyuyamunite	4.HB.25	Ca(UO₂)₂(VO₄)₂ · 3H₂O
ⓘ	Tyuyamunite	4.HB.25	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O
Group 5 - Nitrates and Carbonates
ⓘ	Bayleyite	5.ED.05	Mg₂(UO₂)(CO₃)₃ · 18H₂O
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
ⓘ	Ammoniojarosite	7.BC.10	(NH₄)Fe³⁺₃(SO₄)₂(OH)₆
ⓘ	Jarosite	7.BC.10	KFe³⁺₃(SO₄)₂(OH)₆
ⓘ	Gypsum var. Alabaster	7.CD.40	CaSO₄ · 2H₂O
ⓘ		7.CD.40	CaSO₄ · 2H₂O
ⓘ	var. Selenite	7.CD.40	CaSO₄ · 2H₂O
Group 9 - Silicates
ⓘ	Coffinite	9.AD.30	U(SiO₄) · nH₂O
ⓘ	Beryl var. Aquamarine	9.CJ.05	Be₃Al₂(Si₆O₁₈)
ⓘ		9.CJ.05	Be₃Al₂(Si₆O₁₈)
ⓘ	Dorrite	9.DH.40	Ca₄(Mg₃Fe³⁺₉)O₄(Si₃Al₈Fe³⁺O₃₆)
ⓘ	Anorthite	9.FA.35	Ca(Al₂Si₂O₈)
Unclassified
ⓘ	'Clinopyroxene Subgroup'	-
ⓘ	'Hornblende Root Name Group'	-	◻Ca₂(C²⁺₄C³⁺)(AlSi₇O₂₂)W₂
ⓘ	'Garnet Group'	-	X₃Z₂(SiO₄)₃
ⓘ	'Melilite Group'	-	Ca₂M(XSiO₇)

List of minerals for each chemical element

H	Hydrogen
H	ⓘ Gypsum var. Alabaster	CaSO₄ · 2H₂O
H	ⓘ Ammoniojarosite	(NH₄)Fe₃³⁺(SO₄)₂(OH)₆
H	ⓘ Bayleyite	Mg₂(UO₂)(CO₃)₃ · 18H₂O
H	ⓘ Carnotite	K₂(UO₂)₂(VO₄)₂ · 3H₂O
H	ⓘ Coffinite	U(SiO₄) · nH₂O
H	ⓘ Gypsum	CaSO₄ · 2H₂O
H	ⓘ Jarosite	KFe₃³⁺(SO₄)₂(OH)₆
H	ⓘ Metatyuyamunite	Ca(UO₂)₂(VO₄)₂ · 3H₂O
H	ⓘ Tyuyamunite	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O
H	ⓘ Gypsum var. Selenite	CaSO₄ · 2H₂O
Be	Beryllium
Be	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
C	Carbon
C	ⓘ Bayleyite	Mg₂(UO₂)(CO₃)₃ · 18H₂O
N	Nitrogen
N	ⓘ Ammoniojarosite	(NH₄)Fe₃³⁺(SO₄)₂(OH)₆
O	Oxygen
O	ⓘ Gypsum var. Alabaster	CaSO₄ · 2H₂O
O	ⓘ Ammoniojarosite	(NH₄)Fe₃³⁺(SO₄)₂(OH)₆
O	ⓘ Anorthite	Ca(Al₂Si₂O₈)
O	ⓘ Bayleyite	Mg₂(UO₂)(CO₃)₃ · 18H₂O
O	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
O	ⓘ Carnotite	K₂(UO₂)₂(VO₄)₂ · 3H₂O
O	ⓘ Coffinite	U(SiO₄) · nH₂O
O	ⓘ Cristobalite	SiO₂
O	ⓘ Cuprite	Cu₂O
O	ⓘ Dorrite	Ca₄(Mg₃Fe₉³⁺)O₄(Si₃Al₈Fe³⁺O₃₆)
O	ⓘ Gypsum	CaSO₄ · 2H₂O
O	ⓘ Hematite	Fe₂O₃
O	ⓘ Jarosite	KFe₃³⁺(SO₄)₂(OH)₆
O	ⓘ Magnesioferrite	MgFe₂³⁺O₄
O	ⓘ Metatyuyamunite	Ca(UO₂)₂(VO₄)₂ · 3H₂O
O	ⓘ Pyrolusite	Mn⁴⁺O₂
O	ⓘ Quartz	SiO₂
O	ⓘ Tridymite	SiO₂
O	ⓘ Tyuyamunite	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O
O	ⓘ Uraninite	UO₂
O	ⓘ Gypsum var. Selenite	CaSO₄ · 2H₂O
O	ⓘ Hornblende Root Name Group	◻Ca₂(C₄²⁺C³⁺)(AlSi₇O₂₂)W₂
O	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
O	ⓘ Melilite Group	Ca₂M(XSiO₇)
Mg	Magnesium
Mg	ⓘ Bayleyite	Mg₂(UO₂)(CO₃)₃ · 18H₂O
Mg	ⓘ Dorrite	Ca₄(Mg₃Fe₉³⁺)O₄(Si₃Al₈Fe³⁺O₃₆)
Mg	ⓘ Magnesioferrite	MgFe₂³⁺O₄
Al	Aluminium
Al	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Al	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Al	ⓘ Dorrite	Ca₄(Mg₃Fe₉³⁺)O₄(Si₃Al₈Fe³⁺O₃₆)
Al	ⓘ Hornblende Root Name Group	◻Ca₂(C₄²⁺C³⁺)(AlSi₇O₂₂)W₂
Si	Silicon
Si	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Si	ⓘ Beryl	Be₃Al₂(Si₆O₁₈)
Si	ⓘ Coffinite	U(SiO₄) · nH₂O
Si	ⓘ Cristobalite	SiO₂
Si	ⓘ Dorrite	Ca₄(Mg₃Fe₉³⁺)O₄(Si₃Al₈Fe³⁺O₃₆)
Si	ⓘ Quartz	SiO₂
Si	ⓘ Tridymite	SiO₂
Si	ⓘ Hornblende Root Name Group	◻Ca₂(C₄²⁺C³⁺)(AlSi₇O₂₂)W₂
Si	ⓘ Garnet Group	X₃Z₂(SiO₄)₃
Si	ⓘ Melilite Group	Ca₂M(XSiO₇)
S	Sulfur
S	ⓘ Gypsum var. Alabaster	CaSO₄ · 2H₂O
S	ⓘ Ammoniojarosite	(NH₄)Fe₃³⁺(SO₄)₂(OH)₆
S	ⓘ Chalcocite	Cu₂S
S	ⓘ Gypsum	CaSO₄ · 2H₂O
S	ⓘ Jarosite	KFe₃³⁺(SO₄)₂(OH)₆
S	ⓘ Gypsum var. Selenite	CaSO₄ · 2H₂O
K	Potassium
K	ⓘ Carnotite	K₂(UO₂)₂(VO₄)₂ · 3H₂O
K	ⓘ Jarosite	KFe₃³⁺(SO₄)₂(OH)₆
Ca	Calcium
Ca	ⓘ Gypsum var. Alabaster	CaSO₄ · 2H₂O
Ca	ⓘ Anorthite	Ca(Al₂Si₂O₈)
Ca	ⓘ Dorrite	Ca₄(Mg₃Fe₉³⁺)O₄(Si₃Al₈Fe³⁺O₃₆)
Ca	ⓘ Gypsum	CaSO₄ · 2H₂O
Ca	ⓘ Metatyuyamunite	Ca(UO₂)₂(VO₄)₂ · 3H₂O
Ca	ⓘ Tyuyamunite	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O
Ca	ⓘ Gypsum var. Selenite	CaSO₄ · 2H₂O
Ca	ⓘ Hornblende Root Name Group	◻Ca₂(C₄²⁺C³⁺)(AlSi₇O₂₂)W₂
Ca	ⓘ Melilite Group	Ca₂M(XSiO₇)
V	Vanadium
V	ⓘ Carnotite	K₂(UO₂)₂(VO₄)₂ · 3H₂O
V	ⓘ Metatyuyamunite	Ca(UO₂)₂(VO₄)₂ · 3H₂O
V	ⓘ Tyuyamunite	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O
Mn	Manganese
Mn	ⓘ Pyrolusite	Mn⁴⁺O₂
Fe	Iron
Fe	ⓘ Ammoniojarosite	(NH₄)Fe₃³⁺(SO₄)₂(OH)₆
Fe	ⓘ Dorrite	Ca₄(Mg₃Fe₉³⁺)O₄(Si₃Al₈Fe³⁺O₃₆)
Fe	ⓘ Hematite	Fe₂O₃
Fe	ⓘ Jarosite	KFe₃³⁺(SO₄)₂(OH)₆
Fe	ⓘ Magnesioferrite	MgFe₂³⁺O₄
Cu	Copper
Cu	ⓘ Chalcocite	Cu₂S
Cu	ⓘ Cuprite	Cu₂O
Au	Gold
Au	ⓘ Native Gold	Au
U	Uranium
U	ⓘ Bayleyite	Mg₂(UO₂)(CO₃)₃ · 18H₂O
U	ⓘ Carnotite	K₂(UO₂)₂(VO₄)₂ · 3H₂O
U	ⓘ Coffinite	U(SiO₄) · nH₂O
U	ⓘ Metatyuyamunite	Ca(UO₂)₂(VO₄)₂ · 3H₂O
U	ⓘ Tyuyamunite	Ca(UO₂)₂(VO₄)₂ · 5-8H₂O
U	ⓘ Uraninite	UO₂

Fossils

There are 518 fossil localities from the PaleoBioDB database within this region.

These data are provided on an experimental basis and are taken from external databases. Mindat.org has no control currently over the accuracy of these data.

Occurrences

518

Youngest Fossil Listed

20.4 Ma (Miocene)

Oldest Fossil Listed

501 Ma (Cambrian)

Stratigraphic Units

Click here to view 17 stratigraphic units.

Fossils from Region

Click here to show the list.

Accepted Name	Hierarchy	Age
Favosites genus	Animalia : Cnidaria : Anthozoa : Favositidae : *Favosites*	449.5 - 443.7 Ma Paleozoic
Holophragma genus	Animalia : Cnidaria : Anthozoa : Lykophyllidae : *Holophragma*	449.5 - 443.7 Ma Paleozoic
Streptelasma genus	Animalia : Cnidaria : Anthozoa : Streptelasmatidae : *Streptelasma*	449.5 - 443.7 Ma Paleozoic
Bellerophon genus	Animalia : Mollusca : Gastropoda : Bellerophontidae : *Bellerophon*	318.1 - 311.45 Ma Carboniferous
Straparollus genus	Animalia : Mollusca : Gastropoda : Euomphalidae : *Straparollus*	318.1 - 314.6 Ma Carboniferous
Baylea genus	Animalia : Mollusca : Gastropoda : Raphistomatidae : *Baylea*	318.1 - 311.45 Ma Carboniferous
Borestus genus	Animalia : Mollusca : Gastropoda : Pleurotomariida : Phymatopleuridae : *Borestus*	318.1 - 311.45 Ma Carboniferous
Colpites genus	Animalia : Mollusca : Gastropoda : Sinuopeidae : *Colpites*	318.1 - 311.45 Ma Carboniferous
Goniasma genus	Animalia : Mollusca : Gastropoda : Goniasmatidae : *Goniasma*	318.1 - 311.45 Ma Carboniferous
Mourlonia genus	Animalia : Mollusca : Gastropoda : Pleurotomariida : Eotomariidae : *Mourlonia*	318.1 - 314.6 Ma Carboniferous
Shansiella genus	Animalia : Mollusca : Gastropoda : Pleurotomariida : Portlockiellidae : *Shansiella*	318.1 - 311.45 Ma Carboniferous
Donaldina genus	Animalia : Mollusca : Gastropoda : Streptacididae : *Donaldina*	318.1 - 311.45 Ma Carboniferous
Cephalopoda class	Animalia : Mollusca : Cephalopoda	460.9 - 449.5 Ma Ordovician
Nuculopsis genus	Animalia : Mollusca : Bivalvia : Nuculida : Nuculidae : *Nuculopsis*	318.1 - 314.6 Ma Carboniferous
Paleyoldia genus	Animalia : Mollusca : Bivalvia : Nuculanida : Nuculanidae : *Paleyoldia*	318.1 - 314.6 Ma Carboniferous
Aviculopecten genus	Animalia : Mollusca : Bivalvia : Myalinida : Myalinidae : *Aviculopecten*	318.1 - 314.6 Ma Carboniferous
Pernopecten genus	Animalia : Mollusca : Bivalvia : Pectinida : Entoliidae : *Pernopecten*	318.1 - 311.45 Ma Carboniferous
Pseudomonotis genus	Animalia : Mollusca : Bivalvia : Pectinida : Pseudomonotidae : *Pseudomonotis*	318.1 - 311.45 Ma Carboniferous
Edmondia genus	Animalia : Mollusca : Bivalvia : Adapedonta : Edmondiidae : *Edmondia*	318.1 - 311.45 Ma Carboniferous
Permophorus genus	Animalia : Mollusca : Bivalvia : Venerida : Kalenteridae : *Permophorus*	318.1 - 311.45 Ma Carboniferous
Ptychopariida order	Animalia : Arthropoda : Trilobita : Ptychopariida	501 - 485.4 Ma Cambrian
Alokistocare genus	Animalia : Arthropoda : Trilobita : Ptychopariida : Alokistocaridae : *Alokistocare*	501 - 485.4 Ma Cambrian
Bolaspidella genus	Animalia : Arthropoda : Trilobita : Ptychopariida : Menomoniidae : *Bolaspidella*	501 - 485.4 Ma Cambrian
Rawlinsella genus	Animalia : Arthropoda : Trilobita : Ptychopariida : Bolaspididae : *Rawlinsella*	501 - 485.4 Ma Cambrian
Paladin genus	Animalia : Arthropoda : Trilobita : Proetida : Proetidae : *Paladin*	318.1 - 311.45 Ma Carboniferous
Bryozoa phylum	Animalia : Bryozoa	318.1 - 311.45 Ma Carboniferous
Batostoma genus	Animalia : Bryozoa : Stenolaemata : Trepostomatida : Trematoporidae : *Batostoma*	449.5 - 443.7 Ma Paleozoic
Angulotreta genus	Animalia : Brachiopoda : Lingulata : Acrotretida : Acrotretidae : *Angulotreta*	501 - 485.4 Ma Cambrian
Prototreta genus	Animalia : Brachiopoda : Lingulata : Acrotretida : Acrotretidae : *Prototreta*	501 - 485.4 Ma Cambrian
Platystrophia genus	Animalia : Brachiopoda : Rhynchonellata : Orthida : Platystrophiidae : *Platystrophia*	449.5 - 443.7 Ma Paleozoic
Antiquatonia genus	Animalia : Brachiopoda : Strophomenata : Productida : Productidae : *Antiquatonia*	318.1 - 314.6 Ma Carboniferous
Juresania genus	Animalia : Brachiopoda : Strophomenata : Productida : Echinoconchidae : *Juresania*	318.1 - 311.45 Ma Carboniferous
Linoproductus genus	Animalia : Brachiopoda : Strophomenata : Productida : Linoproductidae : *Linoproductus*	318.1 - 314.6 Ma Carboniferous
Orthotetes genus	Animalia : Brachiopoda : Strophomenata : Orthotetida : Orthotetidae : *Orthotetes*	318.1 - 314.6 Ma Carboniferous
Pulsia genus	Animalia : Brachiopoda : Strophomenata : Orthotetida : Pulsiidae : *Pulsia*	318.1 - 311.45 Ma Carboniferous
Anthracospirifer genus	Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Spiriferidae : *Anthracospirifer*	318.1 - 311.45 Ma Carboniferous
Cyclospira genus	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Cyclospiridae : *Cyclospira*	449.5 - 443.7 Ma Paleozoic
Zygospira genus	Animalia : Brachiopoda : Rhynchonellata : Atrypida : Anazygidae : *Zygospira*	449.5 - 443.7 Ma Paleozoic
Bryantodina genus	Animalia : Chordata : Conodonta : Conodontophorida : *Bryantodina*	460.9 - 443.7 Ma Paleozoic
Chirognathus genus	Animalia : Chordata : Conodonta : *Chirognathus*	460.9 - 443.7 Ma Paleozoic
Coleodus genus	Animalia : Chordata : Conodonta : Conodontophorida : *Coleodus*	460.9 - 443.7 Ma Paleozoic
Cordylodus genus	Animalia : Chordata : Conodonta : Conodontophorida : Proconodontidae : *Cordylodus*	460.9 - 443.7 Ma Paleozoic
Erismodus genus	Animalia : Chordata : Conodonta : *Erismodus*	460.9 - 443.7 Ma Paleozoic
Neocoleodus genus	Animalia : Chordata : Conodonta : Conodontophorida : *Neocoleodus*	460.9 - 443.7 Ma Paleozoic
Oistodus genus	Animalia : Chordata : Conodonta : Conodontophorida : *Oistodus*	460.9 - 443.7 Ma Paleozoic
Oulodus genus	Animalia : Chordata : Hibbardellidae : *Oulodus*	457.5 - 452.5 Ma Late/Upper Ordovician
Paltodus genus	Animalia : Chordata : Conodonta : Protopanderodontida : *Paltodus*	460.9 - 443.7 Ma Paleozoic
Plectodina genus	Animalia : Chordata : Plectodinidae : *Plectodina*	457.5 - 452.5 Ma Late/Upper Ordovician
Stereoconus genus	Animalia : Chordata : Conodonta : Conodontophorida : *Stereoconus*	457.5 - 452.5 Ma Late/Upper Ordovician
Theropoda unranked clade	Animalia : Chordata : Saurischia : Theropoda	157.3 - 145 Ma Jurassic
Elaphrosaurus genus	Animalia : Chordata : Reptilia : Dinosauria : Ornithomimidae : *Elaphrosaurus*	157.3 - 152.1 Ma Jurassic
Allosaurus genus	Animalia : Chordata : Reptilia : Dinosauria : Allosauridae : *Allosaurus*	157.3 - 145 Ma Jurassic
Haplocanthosaurus genus	Animalia : Chordata : Reptilia : Dinosauria : *Haplocanthosaurus*	157.3 - 145 Ma Jurassic
Diplodocidae family	Animalia : Chordata : Reptilia : Dinosauria : Diplodocidae	157.3 - 152.1 Ma Jurassic
Apatosaurus genus	Animalia : Chordata : Reptilia : Dinosauria : Diplodocidae : *Apatosaurus*	157.3 - 145 Ma Jurassic
Barosaurus genus	Animalia : Chordata : Reptilia : Dinosauria : Diplodocidae : *Barosaurus*	157.3 - 152.1 Ma Jurassic
Diplodocus genus	Animalia : Chordata : Reptilia : Dinosauria : Diplodocidae : *Diplodocus*	157.3 - 145 Ma Jurassic
Camarasaurus genus	Animalia : Chordata : Reptilia : Dinosauria : Camarasauridae : *Camarasaurus*	157.3 - 145 Ma Jurassic
Camptosaurus genus	Animalia : Chordata : Reptilia : Dinosauria : *Camptosaurus*	157.3 - 152.1 Ma Jurassic
Stegosaurus genus	Animalia : Chordata : Reptilia : Dinosauria : Stegosauridae : *Stegosaurus*	157.3 - 152.1 Ma Jurassic
Ceratopsia unranked clade	Animalia : Chordata : Ornithischia : Ceratopsia	72.1 - 66 Ma Late/Upper Cretaceous
Mimoperadectes genus	Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : *Mimoperadectes*	55.8 - 50.3 Ma Eocene
Pantolestidae family	Animalia : Chordata : Mammalia : Pantolestidae	55.8 - 50.3 Ma Eocene
Palaeosinopa genus	Animalia : Chordata : Mammalia : Pantolestidae : *Palaeosinopa*	55.8 - 50.3 Ma Eocene
Phenacolemur genus	Animalia : Chordata : Mammalia : Primates : Paromomyidae : *Phenacolemur*	55.8 - 50.3 Ma Eocene
Simpsonlemur genus	Animalia : Chordata : Mammalia : Primates : Paromomyidae : *Simpsonlemur*	55.8 - 50.3 Ma Eocene
Insectivora order	Animalia : Chordata : Mammalia : Insectivora	55.8 - 50.3 Ma Eocene
Erinaceidae family	Animalia : Chordata : Mammalia : Erinaceomorpha : Erinaceidae	55.8 - 50.3 Ma Eocene
Nyctitheriidae family	Animalia : Chordata : Mammalia : Soricomorpha : Nyctitheriidae	55.8 - 50.3 Ma Eocene
Coryphodon genus	Animalia : Chordata : Mammalia : Coryphodontidae : *Coryphodon*	55.8 - 50.3 Ma Eocene
Niptomomys genus	Animalia : Chordata : Mammalia : Primates : Microsyopidae : *Niptomomys*	55.8 - 50.3 Ma Eocene
Omomyidae family	Animalia : Chordata : Mammalia : Primates : Omomyidae	55.8 - 50.3 Ma Eocene
Tetonius genus	Animalia : Chordata : Mammalia : Primates : Anaptomorphidae : *Tetonius*	55.8 - 50.3 Ma Eocene
Didymictis genus	Animalia : Chordata : Mammalia : Carnivora : Viverravidae : *Didymictis*	55.8 - 50.3 Ma Eocene
Rodentia order	Animalia : Chordata : Mammalia : Rodentia	55.8 - 50.3 Ma Eocene
Paramys genus	Animalia : Chordata : Mammalia : Rodentia : Ischyromyidae : *Paramys*	55.8 - 50.3 Ma Eocene
Sciuravus genus	Animalia : Chordata : Mammalia : Rodentia : Sciuravidae : *Sciuravus*	55.8 - 50.3 Ma Eocene
Geomyidae family	Animalia : Chordata : Mammalia : Rodentia : Geomyidae	30.8 - 20.43 Ma Cenozoic
Ziamys genus	Animalia : Chordata : Mammalia : Rodentia : Geomyidae : *Ziamys*	30.8 - 20.43 Ma Cenozoic
Desmatolagus genus	Animalia : Chordata : Mammalia : Lagomorpha : Ochotonidae : *Desmatolagus*	30.8 - 20.43 Ma Cenozoic
Apheliscus genus	Animalia : Chordata : Mammalia : Mioclaenidae : *Apheliscus*	55.8 - 50.3 Ma Eocene
Hyopsodus genus	Animalia : Chordata : Mammalia : Hyopsodontidae : *Hyopsodus*	55.8 - 50.3 Ma Eocene
Phenacodus genus	Animalia : Chordata : Mammalia : Phenacodontidae : *Phenacodus*	55.8 - 50.3 Ma Eocene
Diacodexis genus	Animalia : Chordata : Mammalia : Artiodactyla : Dichobunidae : *Diacodexis*	55.8 - 50.3 Ma Eocene
Oreodontoides genus	Animalia : Chordata : Mammalia : Artiodactyla : Merycoidodontidae : *Oreodontoides*	30.8 - 20.43 Ma Cenozoic
Equidae family	Animalia : Chordata : Mammalia : Perissodactyla : Equidae	37.2 - 33.9 Ma Paleogene
Hyracotherium genus	Animalia : Chordata : Mammalia : Perissodactyla : Equidae : *Hyracotherium*	55.8 - 50.3 Ma Eocene
Brontotheriidae family	Animalia : Chordata : Mammalia : Perissodactyla : Brontotheriidae	37.2 - 33.9 Ma Paleogene
Arfia zele species	Animalia : Chordata : Mammalia : Hyaenodontidae : Arfia : *Arfia zele*	55.8 - 50.3 Ma Eocene
Cantius torresi species	Animalia : Chordata : Mammalia : Primates : Notharctidae : Cantius : *Cantius torresi*	55.8 - 50.3 Ma Eocene
Chriacus gallinae species	Animalia : Chordata : Mammalia : Oxyclaenidae : Chriacus : *Chriacus gallinae*	55.8 - 50.3 Ma Eocene
Coryphodon eocaenus species	Animalia : Chordata : Mammalia : Coryphodontidae : Coryphodon : *Coryphodon eocaenus*	55.8 - 50.3 Ma Eocene
Didelphodus absarokae species	Animalia : Chordata : Mammalia : Hyaenodonta : Didelphodus : *Didelphodus absarokae*	55.8 - 50.3 Ma Eocene
Diacodexis primus species	Animalia : Chordata : Mammalia : Artiodactyla : Dichobunidae : Diacodexis : *Diacodexis primus*	55.8 - 50.3 Ma Eocene
Prodiacodon tauricinerei species	Animalia : Chordata : Mammalia : Leptictidae : Prodiacodon : *Prodiacodon tauricinerei*	55.8 - 50.3 Ma Eocene
Macrocranion nitens species	Animalia : Chordata : Mammalia : Macroscelidea : Amphilemuridae : Macrocranion : *Macrocranion nitens*	55.8 - 50.3 Ma Eocene
Esthonyx spatularius species	Animalia : Chordata : Mammalia : Tillotheriidae : Esthonyx : *Esthonyx spatularius*	55.8 - 50.3 Ma Eocene
Neoliotomus ultimus species	Animalia : Chordata : Mammalia : Multituberculata : Neoliotomus : *Neoliotomus ultimus*	55.8 - 50.3 Ma Eocene
Haplomylus bozemanensis species	Animalia : Chordata : Mammalia : Hyopsodontidae : Haplomylus : *Haplomylus bozemanensis*	55.8 - 50.3 Ma Eocene
Haplomylus speirianus species	Animalia : Chordata : Mammalia : Macroscelidea : Apheliscidae : Haplomylus : *Haplomylus speirianus*	55.8 - 50.3 Ma Eocene
Sifrhippus grangeri species	Animalia : Chordata : Mammalia : Perissodactyla : Equidae : Sifrhippus : *Sifrhippus grangeri*	55.8 - 50.3 Ma Eocene
Phenacodus vortmani species	Animalia : Chordata : Mammalia : Ungulata : Phenacodontidae : Phenacodus : *Phenacodus vortmani*	55.8 - 50.3 Ma Eocene
Ignacius graybullianus species	Animalia : Chordata : Mammalia : Primates : Paromomyidae : Ignacius : *Ignacius graybullianus*	55.8 - 50.3 Ma Eocene
Koniaryctes paulus species	Animalia : Chordata : Mammalia : Apternodontidae : Koniaryctes : *Koniaryctes paulus*	55.8 - 50.3 Ma Eocene
Leipsanolestes siegfriedti species	Animalia : Chordata : Mammalia : Erinaceomorpha : Creotarsidae : Leipsanolestes : *Leipsanolestes siegfriedti*	55.8 - 50.3 Ma Eocene
Miacis exiguus species	Animalia : Chordata : Mammalia : Carnivora : Miacidae : Miacis : *Miacis exiguus*	55.8 - 50.3 Ma Eocene
Dryomomys willwoodensis species	Animalia : Chordata : Mammalia : Primates : Micromomyidae : Dryomomys : *Dryomomys willwoodensis*	55.8 - 50.3 Ma Eocene
Arctodontomys wilsoni species	Animalia : Chordata : Mammalia : Primates : Microsyopidae : Arctodontomys : *Arctodontomys wilsoni*	55.8 - 50.3 Ma Eocene
Ectocion osbornianus species	Animalia : Chordata : Mammalia : Ungulata : Phenacodontidae : Ectocion : *Ectocion osbornianus*	55.8 - 50.3 Ma Eocene
Dipsalidictis transiens species	Oxyaenidae : Dipsalidictis : *Dipsalidictis transiens*	55.8 - 50.3 Ma Eocene
Miotylopus gibbi species	Animalia : Chordata : Mammalia : Artiodactyla : Camelidae : Miotylopus : *Miotylopus gibbi*	30.8 - 20.43 Ma Cenozoic
Palaeoryctes punctatus species	Animalia : Chordata : Mammalia : Palaeoryctidae : Palaeoryctes : *Palaeoryctes punctatus*	55.8 - 50.3 Ma Eocene
Palaeosinopa incerta species	Animalia : Chordata : Mammalia : Pantolestidae : Palaeosinopa : *Palaeosinopa incerta*	55.8 - 50.3 Ma Eocene
Palaeosinopa lutreola species	Animalia : Chordata : Mammalia : Pantolestidae : Palaeosinopa : *Palaeosinopa lutreola*	55.8 - 50.3 Ma Eocene
Paramys copei species	Animalia : Chordata : Mammalia : Rodentia : Ischyromyidae : Paramys : *Paramys copei*	55.8 - 50.3 Ma Eocene
Parectypodus lunatus species	Animalia : Chordata : Mammalia : Ptilodontidae : Parectypodus : *Parectypodus lunatus*	55.8 - 50.3 Ma Eocene
Ectypodus tardus species	Animalia : Chordata : Mammalia : Multituberculata : Neoplagiaulacidae : Ectypodus : *Ectypodus tardus*	55.8 - 50.3 Ma Eocene
Cantius frugivorus species	Animalia : Chordata : Mammalia : Primates : Notharctidae : Cantius : *Cantius frugivorus*	55.8 - 50.3 Ma Eocene
Cantius mckennai species	Animalia : Chordata : Mammalia : Primates : Notharctidae : Cantius : *Cantius mckennai*	55.8 - 50.3 Ma Eocene
Cantius ralstoni species	Animalia : Chordata : Mammalia : Primates : Notharctidae : Cantius : *Cantius ralstoni*	55.8 - 50.3 Ma Eocene
Peradectes protinnominatus species	Animalia : Chordata : Mammalia : Didelphimorphia : Didelphidae : Peradectes : *Peradectes protinnominatus*	55.8 - 50.3 Ma Eocene
Copecion brachypternus species	Animalia : Chordata : Mammalia : Ungulata : Phenacodontidae : Copecion : *Copecion brachypternus*	55.8 - 50.3 Ma Eocene
Phenacodus intermedius species	Animalia : Chordata : Mammalia : Phenacodontidae : Phenacodus : *Phenacodus intermedius*	55.8 - 50.3 Ma Eocene
Phenacodus trilobatus species	Animalia : Chordata : Mammalia : Phenacodontidae : Phenacodus : *Phenacodus trilobatus*	55.8 - 50.3 Ma Eocene
Phenacolemur praecox species	Animalia : Chordata : Mammalia : Primates : Paromomyidae : Phenacolemur : *Phenacolemur praecox*	55.8 - 50.3 Ma Eocene
Phenacolemur simonsi species	Animalia : Chordata : Mammalia : Primates : Paromomyidae : Phenacolemur : *Phenacolemur simonsi*	55.8 - 50.3 Ma Eocene
Prolimnocyon atavus species	Animalia : Chordata : Mammalia : Hyaenodontidae : Prolimnocyon : *Prolimnocyon atavus*	55.8 - 50.3 Ma Eocene
Prolimnocyon haematus species	Animalia : Chordata : Mammalia : Hyaenodontidae : Prolimnocyon : *Prolimnocyon haematus*	55.8 - 50.3 Ma Eocene
Prototomus robustus species	Animalia : Chordata : Mammalia : Hyaenodonta : Hyaenodontidae : Prototomus : *Prototomus robustus*	55.8 - 50.3 Ma Eocene
Proscalops secundus species	Animalia : Chordata : Mammalia : Proscalopidae : Proscalops : *Proscalops secundus*	30.8 - 20.43 Ma Cenozoic
Prototomus martis species	Animalia : Chordata : Mammalia : Hyaenodontidae : Prototomus : *Prototomus martis*	55.8 - 50.3 Ma Eocene
Pulverflumen magnificum species	Animalia : Chordata : Mammalia : Primates : Paromomyidae : Pulverflumen : *Pulverflumen magnificum*	55.8 - 50.3 Ma Eocene
Galecyon mordax species	Animalia : Chordata : Mammalia : Hyaenodonta : Hyaenodontidae : Galecyon : *Galecyon mordax*	55.8 - 50.3 Ma Eocene
Homogalax protapirinus species	Animalia : Chordata : Mammalia : Perissodactyla : Homogalax : *Homogalax protapirinus*	55.8 - 50.3 Ma Eocene
Talpavoides dartoni species	Animalia : Chordata : Mammalia : Talpavoides : *Talpavoides dartoni*	55.8 - 50.3 Ma Eocene
Apatemys chardini species	Animalia : Chordata : Mammalia : Insectivora : Apatemyidae : Apatemys : *Apatemys chardini*	55.8 - 50.3 Ma Eocene
Tinimomys graybulliensis species	Animalia : Chordata : Mammalia : Primates : Micromomyidae : Tinimomys : *Tinimomys graybulliensis*	55.8 - 50.3 Ma Eocene
Viverravus acutus species	Animalia : Chordata : Mammalia : Carnivora : Viverravidae : Viverravus : *Viverravus acutus*	55.8 - 50.3 Ma Eocene
Hamamelidaceae family	Plantae : Tracheophyta : Magnoliopsida : Saxifragales : Hamamelidaceae	55.8 - 50.3 Ma Eocene
Dryosaurus altus species	Animalia : Chordata : Ornithischia : Dryosauridae : Dryosaurus : *Dryosaurus altus*	157.3 - 145 Ma Jurassic
Platanus genus	Plantae : Tracheophyta : Magnoliopsida : Proteales : Platanaceae : *Platanus*	55.8 - 50.3 Ma Eocene
Nordenskioldia borealis species	Nordenskioldia : *Nordenskioldia borealis*	66 - 56 Ma Paleocene
Juglandaceae family	Plantae : Tracheophyta : Magnoliopsida : Fagales : Juglandaceae	55.8 - 50.3 Ma Eocene
Alnus genus	Plantae : Tracheophyta : Magnoliopsida : Fagales : Betulaceae : *Alnus*	55.8 - 50.3 Ma Eocene
Betulaceae family	Plantae : Tracheophyta : Magnoliopsida : Fagales : Betulaceae	55.8 - 50.3 Ma Eocene
Quercus genus	Plantae : Tracheophyta : Magnoliopsida : Fagales : Fagaceae : *Quercus*	55.8 - 50.3 Ma Eocene
Cercidiphyllum genus	Plantae : Tracheophyta : Magnoliopsida : Saxifragales : Cercidiphyllaceae : *Cercidiphyllum*	66 - 56 Ma Paleocene
Sapindaceae family	Plantae : Tracheophyta : Magnoliopsida : Sapindales : Sapindaceae	55.8 - 50.3 Ma Eocene
Calycites genus	Plantae : Tracheophyta : Magnoliopsida : Asterales : Asteraceae : *Calycites*	55.8 - 50.3 Ma Eocene
Equisetum genus	Plantae : Tracheophyta : Polypodiopsida : Equisetales : Equisetaceae : *Equisetum*	55.8 - 50.3 Ma Eocene
Magnoliopsida class	Plantae : Tracheophyta : Magnoliopsida	55.8 - 50.3 Ma Eocene
Lygodium kaulfussi species	Plantae : Tracheophyta : Polypodiopsida : Schizaeales : Lygodiaceae : Lygodium : *Lygodium kaulfussi*	55.8 - 50.3 Ma Eocene
Salvinia preauriculata species	Plantae : Tracheophyta : Polypodiopsida : Salviniales : Salviniaceae : Salvinia : *Salvinia preauriculata*	55.8 - 50.3 Ma Eocene
Glyptostrobus europaeus species	Plantae : Tracheophyta : Pinopsida : Pinales : Cupressaceae : Glyptostrobus : *Glyptostrobus europaeus*	55.8 - 50.3 Ma Eocene
Zingiberopsis isonervosa species	Plantae : Tracheophyta : Liliopsida : Zingiberales : Zingiberaceae : Zingiberopsis : *Zingiberopsis isonervosa*	55.8 - 50.3 Ma Eocene
Betula genus	Plantae : Tracheophyta : Magnoliopsida : Fagales : Betulaceae : *Betula*	66 - 56 Ma Paleocene
Cercidiphyllum genetrix species	Plantae : Spermatophyta : Magnoliopsida : Saxifragales : Cercidiphyllaceae : Cercidiphyllum : *Cercidiphyllum genetrix*	55.8 - 50.3 Ma Eocene
Menispermites parvareolatus species	Plantae : Tracheophyta : Magnoliopsida : Ranunculales : Menispermaceae : Menispermites : *Menispermites parvareolatus*	55.8 - 50.3 Ma Eocene
Averrhoites affinis species	Plantae : Spermatophyta : Magnoliopsida : Sapindales : Oxalidaceae : Averrhoites : *Averrhoites affinis*	55.8 - 50.3 Ma Eocene
Meliosma longifolia species	Plantae : Spermatophyta : Magnoliopsida : Ranunculales : Sabiaceae : Meliosma : *Meliosma longifolia*	55.8 - 50.3 Ma Eocene
Penosphyllum cordatum species	Plantae : Spermatophyta : Magnoliopsida : Malvales : Sterculiaceae : Penosphyllum : *Penosphyllum cordatum*	55.8 - 50.3 Ma Eocene
Ampelopsis acerifolia species	Plantae : Tracheophyta : Magnoliopsida : Vitales : Vitaceae : Ampelopsis : *Ampelopsis acerifolia*	66 - 56 Ma Paleocene
Dombeya novimundi species	Plantae : Tracheophyta : Magnoliopsida : Malvales : Malvaceae : Dombeya : *Dombeya novimundi*	55.8 - 50.3 Ma Eocene
Alismataceae family	Plantae : Tracheophyta : Liliopsida : Alismatales : Alismataceae	55.8 - 50.3 Ma Eocene
Populus genus	Plantae : Tracheophyta : Magnoliopsida : Malpighiales : Salicaceae : *Populus*	55.8 - 50.3 Ma Eocene
Ginkgo adiantoides species	Plantae : Tracheophyta : Ginkgoopsida : Ginkgoales : Ginkgoaceae : Ginkgo : *Ginkgo adiantoides*	55.8 - 50.3 Ma Eocene
Platanus raynoldsii species	Plantae : Tracheophyta : Magnoliopsida : Proteales : Platanaceae : Platanus : *Platanus raynoldsii*	55.8 - 50.3 Ma Eocene
Miacinae subfamily	Animalia : Chordata : Mammalia : Carnivora : Miacidae : Miacinae	55.8 - 50.3 Ma Eocene
Maclurina manitobensis species	Animalia : Mollusca : Gastropoda : Euomphalina : Macluritidae : Maclurina : *Maclurina manitobensis*	460.9 - 449.5 Ma Ordovician
Glyptosaurinae subfamily	Animalia : Chordata : Reptilia : Squamata : Anguidae : Glyptosaurinae	55.8 - 50.3 Ma Eocene
Murchisonioidea superfamily	Animalia : Mollusca : Gastropoda : Murchisoniina : Murchisonioidea	318.1 - 311.45 Ma Carboniferous
Galeamopus hayi species	Animalia : Chordata : Saurischia : Diplodocidae : Galeamopus : *Galeamopus hayi*	157.3 - 145 Ma Jurassic
Hesperosaurus mjosi species	Animalia : Chordata : Ornithischia : Stegosauridae : Hesperosaurus : *Hesperosaurus mjosi*	157.3 - 152.1 Ma Jurassic
Waagenella crassus species	Animalia : Mollusca : Gastropoda : Bellerophontida : Bellerophontidae : Waagenella : *Waagenella crassus*	318.1 - 311.45 Ma Carboniferous
Euomphalus plummeri species	Animalia : Mollusca : Gastropoda : Euomphalina : Euomphalidae : Euomphalus : *Euomphalus plummeri*	318.1 - 311.45 Ma Carboniferous
Sceptropora facula species	Animalia : Bryozoa : Stenolaemata : Cryptostomida : Arthrostylidae : Sceptropora : *Sceptropora facula*	449.5 - 443.7 Ma Paleozoic
Acodus genus	Animalia : Chordata : *Acodus*	460.9 - 443.7 Ma Paleozoic
Artiodactyla order	Animalia : Chordata : Mammalia : Artiodactyla	37.2 - 33.9 Ma Paleogene
Astartella concentrica species	Animalia : Mollusca : Bivalvia : Carditida : Astartidae : Astartella : *Astartella concentrica*	318.1 - 311.45 Ma Carboniferous
Amphiscapha calix species	Animalia : Mollusca : Gastropoda : Euomphalina : Euomphalidae : Amphiscapha : *Amphiscapha calix*	326.4 - 318.1 Ma Carboniferous
Phenacolemurinae subfamily	Animalia : Chordata : Mammalia : Primates : Paromomyidae : Phenacolemurinae	55.8 - 50.3 Ma Eocene
Hiscobeccus gigas species	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : Hiscobeccus : *Hiscobeccus gigas*	449.5 - 443.7 Ma Paleozoic
Hypsiptycha anticostiensis species	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : Hypsiptycha : *Hypsiptycha anticostiensis*	449.5 - 443.7 Ma Paleozoic
Archeognathus genus	Animalia : Chordata : Conodonta : Archaeognathidae : *Archeognathus*	457.5 - 452.5 Ma Late/Upper Ordovician
Palmocarpon genus	Plantae : Angiospermae : Arecales : Palmae : *Palmocarpon*	66 - 56 Ma Paleocene
Metoicoceras geslinianum species	Animalia : Mollusca : Cephalopoda : Ammonitida : Acanthoceratidae : Metoicoceras : *Metoicoceras geslinianum*	99.6 - 93.5 Ma Late/Upper Cretaceous
Astraspis desiderata species	Animalia : Chordata : Astraspididae : Astraspis : *Astraspis desiderata*	449.5 - 443.7 Ma Paleozoic
Baptanodon robustus species	Animalia : Chordata : Reptilia : Ophthalmosauridae : Baptanodon : *Baptanodon robustus*	168.3 - 157.3 Ma Jurassic
Hyperodapedon sanjuanensis species	Animalia : Chordata : Reptilia : Eosuchia : Rhynchosauridae : Hyperodapedon : *Hyperodapedon sanjuanensis*	237 - 228 Ma Late/Upper Triassic
Schizodus alpinus species	Animalia : Mollusca : Bivalvia : Trigoniida : Schizodidae : Schizodus : *Schizodus alpinus*	318.1 - 314.6 Ma Carboniferous
Lonchodus genus	Animalia : Chordata : Conodonta : Conodontophorida : Prioniodidae : *Lonchodus*	460.9 - 443.7 Ma Paleozoic
Cranea wyomingensis species	Plantae : Tracheophyta : Magnoliopsida : Fagales : Betulaceae : Cranea : *Cranea wyomingensis*	66 - 33.9 Ma Paleogene
Hesperorthis pyramidalis species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Hesperorthidae : Hesperorthis : *Hesperorthis pyramidalis*	449.5 - 443.7 Ma Paleozoic
Juglandicarya genus	*Juglandicarya*	66 - 56 Ma Paleocene
Phoebe genus	*Phoebe*	55.8 - 50.3 Ma Eocene
Eriptychius americanus species	Animalia : Chordata : Pteraspidomorpha : Astraspidiformes : Eriptychius : *Eriptychius americanus*	449.5 - 443.7 Ma Paleozoic
Nasutimena fluctuosa species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Nasutimena : *Nasutimena fluctuosa*	449.5 - 443.7 Ma Paleozoic
Megamyonia nitens species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Megamyonia : *Megamyonia nitens*	449.5 - 443.7 Ma Paleozoic
Gnamptorhynchos prayi species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Platystrophiidae : Gnamptorhynchos : *Gnamptorhynchos prayi*	449.5 - 443.7 Ma Paleozoic
Isocrinus wyomingensis species	Animalia : Echinodermata : Crinoidea : Isocrinida : Isocrinidae : Isocrinus : *Isocrinus wyomingensis*	168.3 - 166.1 Ma Middle Jurassic
Dinorthis occidentalis species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plaesiomyidae : Dinorthis : *Dinorthis occidentalis*	449.5 - 443.7 Ma Paleozoic
Rhynchotrema iowense species	Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Rhynchotrematidae : Rhynchotrema : *Rhynchotrema iowense*	449.5 - 443.7 Ma Paleozoic
Diceromyonia storeya species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Platyorthidae : Diceromyonia : *Diceromyonia storeya*	449.5 - 443.7 Ma Paleozoic
Plaesiomys rockymontana species	Animalia : Brachiopoda : Rhynchonellata : Orthida : Plaesiomyidae : Plaesiomys : *Plaesiomys rockymontana*	449.5 - 443.7 Ma Paleozoic
Rugomena planocorrugata species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Rugomena : *Rugomena planocorrugata*	449.5 - 443.7 Ma Paleozoic
Belodus genus	*Belodus*	460.9 - 443.7 Ma Paleozoic
Eubostrychoceras matsumotoi species	Animalia : Mollusca : Cephalopoda : Ammonoidea : Nostoceratidae : Eubostrychoceras : *Eubostrychoceras matsumotoi*	93.5 - 89.3 Ma Late/Upper Cretaceous
Neocardioceras uptonense species	Animalia : Mollusca : Cephalopoda : Ammonoidea : Acanthoceratidae : Neocardioceras : *Neocardioceras uptonense*	99.6 - 93.5 Ma Late/Upper Cretaceous
Leguminosites coloradensis species	Plantae : Tracheophyta : Magnoliopsida : Fabales : Fabaceae : Leguminosites : *Leguminosites coloradensis*	66 - 56 Ma Paleocene
Panderodus equicostatus species	Animalia : Chordata : Conodonta : Panderodontida : Panderodontidae : Panderodus : *Panderodus equicostatus*	457.5 - 452.5 Ma Late/Upper Ordovician
Drepanoistodus suberectus species	Animalia : Chordata : Conodonta : Protopanderodontida : Drepanoistodus : *Drepanoistodus suberectus*	457.5 - 452.5 Ma Late/Upper Ordovician
Eochonetes maearum species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Sowerbyellidae : Eochonetes : *Eochonetes maearum*	449.5 - 443.7 Ma Paleozoic
Promylagaulinae subfamily	Animalia : Chordata : Mammalia : Rodentia : Mylagaulidae : Promylagaulinae	30.8 - 20.43 Ma Cenozoic
Oepikina pergibbosa species	Animalia : Brachiopoda : Strophomenata : Strophomenida : Strophomenidae : Oepikina : *Oepikina pergibbosa*	449.5 - 443.7 Ma Paleozoic
Erismodus gracilis species	Animalia : Chordata : Conodonta : Erismodus : *Erismodus gracilis*	460.9 - 443.7 Ma Paleozoic
Erismodus asymmetricus species	Animalia : Chordata : Conodonta : Erismodus : *Erismodus asymmetricus*	460.9 - 443.7 Ma Paleozoic
Erismodus typus species	Animalia : Chordata : Conodonta : Erismodus : *Erismodus typus*	460.9 - 443.7 Ma Paleozoic

Fossil Localities

Click to show 27 fossil localities

Other Databases

Wikipedia:	https://en.wikipedia.org/wiki/Johnson_County,_Wyoming
Wikidata ID:	Q484268
GeoNames ID:	5828957

Localities in this Region

USA

Wyoming
- Johnson County

USA

Wyoming
- Johnson County

Other Regions, Features and Areas that Intersect

North AmericaContinent

Rocky MountainsMountain Range

North America PlateTectonic Plate

Middle Rocky MountainsOrogenic Belt
Powder River BasinBasin
Wyoming CratonCraton
Wyoming DomainDomain

USA

Wyoming
- Campbell County
  - Pumpkin Buttes Mining DistrictMining District
- Johnson County
  - Pumpkin Buttes Mining DistrictMining District

This page contains all mineral locality references listed on mindat.org. This does not claim to be a complete list. If you know of more minerals from this site, please register so you can add to our database. This locality information is for reference purposes only. You should never attempt to visit any sites listed in mindat.org without first ensuring that you have the permission of the land and/or mineral rights holders for access and that you are aware of all safety precautions necessary.

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Johnson County, Wyoming, USAiRegional Level TypesJohnson CountyCounty WyomingState USACountry function showexplain() { $("#locexplain").toggle(); if (typeof movemap === "function") movemap(); }

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Commodity List

Mineral List

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Detailed Mineral List:

Gallery:

List of minerals arranged by Strunz 10th Edition classification

List of minerals for each chemical element

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Johnson County, Wyoming, USA i
Regional Level Types
Johnson County County
Wyoming State
USA Country