Vote for your favorite mineral in #MinCup26! - Sphalerite vs. Anorthite
Both zinc ore Sphalerite and calcium plagioclase feldspar Anorthite have perfect cleavage that will split cleanly if you hit them with a hammer, but only one can claim a larger split of your votes!
Log InRegister
Quick Links : The Mindat ManualThe Rock H. Currier Digital LibraryMindat Newsletter [Free Download]
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsThe Rock H. Currier Digital LibraryGeologic TimeExplore Fossils
Minerals by PropertiesMinerals by ChemistryMineral Visual ExplorerAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsClubs & OrganizationsMineral Shows & EventsThe Mindat DirectoryDevice SettingsThe Mineral QuizTime Machine
Photo SearchPhoto GalleriesSearch by ColorPhoto Colour ExplorerNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryPhotography

Iowa County, Iowa, USAi
Regional Level Types
Iowa CountyCounty
IowaState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
Type:
Largest Settlements:
PlacePopulation
Williamsburg3,195 (2017)
Marengo2,513 (2017)
North English1,022 (2017)
Victor888 (2017)
Middle Amana581 (2017)
Amana442 (2017)
Mindat Locality ID:
288693
Long-form identifier:
mindat:1:2:288693:3
GUID (UUID V4):
0
Other Languages:
French:
comté d'Iowa, Iowa, États-Unis
German:
Iowa County, Iowa, Vereinigte Staaten
Italian:
contea di Iowa, Iowa, Stati Uniti d'America
Russian:
Айова, Айова, Соединённые Штаты Америки
Simplified Chinese:
愛阿華縣, 艾奥瓦州, 美国
Spanish:
Condado de Iowa, Iowa, Estados Unidos
Albanian:
Iowa County, Iowa, Shtetet e Bashkuara të Amerikës
Arabic:
مقاطعة آيوا, آيوا, الولايات المتحدة
Armenian:
Այովա շրջան, Այովա, Ամերիկայի Միացյալ Նահանգներ
Basque:
Iowa konderria , Iowa
Bavarian:
Iowa County, Iowa, Vaoanigte Stootn
Bishnupriya Manipuri:
আইৱা কাউন্টি, আইৱা, তিলপারাষ্ট্র
Bulgarian:
Айова, Айова, Съединени американски щати
Cebuano:
Iowa County , Iowa
Dutch:
Iowa County, Iowa, Verenigde Staten
Esperanto:
Kantono Iowa, Iovao
Estonian:
Iowa maakond, Iowa, Ameerika Ühendriigid
Farsi/Persian:
شهرستان آیووا، آیووا, آیووا, ایالات متحده آمریکا
Georgian:
აიოვის ოლქი, აიოვა, ამერიკის შეერთებული შტატები
Hebrew:
מחוז איווה, איווה, ארצות הברית
Hungarian:
Iowa megye, Iowa, Amerikai Egyesült Államok
Japanese:
アイオワ郡, アイオワ州, アメリカ合衆国
Low Saxon/Low German:
Iowa County, Iowa, USA
Min Dong Chinese:
Iowa Gông, Iowa
Minnan / Hokkien-Taiwanese:
Iowa Kūn
Norwegian:
Iowa County, Iowa, USA
Polish:
Hrabstwo Iowa, Iowa, Stany Zjednoczone
Portuguese:
Condado de Iowa, Iowa, Estados Unidos
Romanian:
Comitatul Iowa, Iowa, Statele Unite ale Americii
Sardinian:
contea de Iowa, Iowa, Istados Unidos de Amèrica
Scottish Gaelic:
Iowa County, Iowa, Na Stàitean Aonaichte
Serbian:
Округ Ајова, Ајова, Сједињене Америчке Државе
Serbo-Croatian:
Iowa County, Iowa, Sjedinjene Američke Države
Swedish:
Iowa County, Iowa, USA
Traditional Chinese:
艾奧瓦縣, 埃奧華州, 美國
Turkish:
Iowa County, Iowa, Amerika Birleşik Devletleri
Ukrainian:
Айова, Айова, Сполучені Штати Америки
Urdu:
آئیووا کاؤنٹی، آئیووا, آئیووا, ریاستہائے متحدہ امریکا
Vietnamese:
Quận Iowa, Iowa, Chủng Quốc Hoa Kỳ
Waray:
Condado han Iowa, Iowa, Estados Unidos
Western Punjabi:
آئیووا کاؤنٹی, آئیووا, امریکہ


No description has been added for this locality. Can you add one?

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Mineral List

Mineral list contains entries from the region specified including sub-localities

8 valid minerals.

Rock Types Recorded

Note: data is currently VERY limited. Please bear with us while we work towards adding this information!

Rock list contains entries from the region specified including sub-localities

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

'Apatite'
Formula: Ca5(PO4)3(Cl/F/OH)
Chromite
Formula: Fe2+Cr3+2O4
Description: Prior's Identification based on his own chemical analysis and petrographic details of Farrington(1915).
'Clinopyroxene Subgroup'
Copper
Formula: Cu
'Fayalite-Forsterite Series'
Description: Composition Fa23.3 (Rubin,1990) perhaps better than the earlier Fa24 of Mason, 1963.
References:
'Glass'
Iron
Formula: Fe
Iron var. Kamacite
Formula: (Fe,Ni)
Merrillite
Formula: Ca9NaMg(PO4)7
'Orthopyroxene Subgroup'
Description: Composition (Fs20) — Labelled as 'bronzite' in earlier literature.
'Plagioclase'
Formula: (Na,Ca)[(Si,Al)AlSi2]O8
'Plessite'
Spinel
Formula: MgAl2O4
Taenite
Formula: (Fe,Ni)
Tetrataenite
Formula: FeNi
Troilite
Formula: FeS

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Iron1.AE.05Fe
var. Kamacite1.AE.05(Fe,Ni)
Taenite1.AE.10(Fe,Ni)
Tetrataenite1.AE.10FeNi
Group 2 - Sulphides and Sulfosalts
Troilite2.CC.10FeS
Group 4 - Oxides and Hydroxides
Chromite4.BB.05Fe2+Cr3+2O4
Spinel4.BB.05MgAl2O4
Group 8 - Phosphates, Arsenates and Vanadates
Merrillite8.AC.45Ca9NaMg(PO4)7
Unclassified
'Clinopyroxene Subgroup'-
'Fayalite-Forsterite Series'-
'Plagioclase'-(Na,Ca)[(Si,Al)AlSi2]O8
'Plessite'-
'Orthopyroxene Subgroup'-
'Glass'-
'Apatite'-Ca5(PO4)3(Cl/F/OH)

List of minerals for each chemical element

HHydrogen
H ApatiteCa5(PO4)3(Cl/F/OH)
OOxygen
O ChromiteFe2+Cr23+O4
O SpinelMgAl2O4
O MerrilliteCa9NaMg(PO4)7
O Fayalite-Forsterite Series
O Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
O ApatiteCa5(PO4)3(Cl/F/OH)
FFluorine
F ApatiteCa5(PO4)3(Cl/F/OH)
NaSodium
Na MerrilliteCa9NaMg(PO4)7
Na Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
MgMagnesium
Mg SpinelMgAl2O4
Mg MerrilliteCa9NaMg(PO4)7
Mg Fayalite-Forsterite Series
AlAluminium
Al SpinelMgAl2O4
Al Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
SiSilicon
Si Fayalite-Forsterite Series
Si Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
PPhosphorus
P MerrilliteCa9NaMg(PO4)7
P ApatiteCa5(PO4)3(Cl/F/OH)
SSulfur
S TroiliteFeS
ClChlorine
Cl ApatiteCa5(PO4)3(Cl/F/OH)
CaCalcium
Ca MerrilliteCa9NaMg(PO4)7
Ca Plagioclase(Na,Ca)[(Si,Al)AlSi2]O8
Ca ApatiteCa5(PO4)3(Cl/F/OH)
CrChromium
Cr ChromiteFe2+Cr23+O4
FeIron
Fe ChromiteFe2+Cr23+O4
Fe IronFe
Fe Iron var. Kamacite(Fe,Ni)
Fe Taenite(Fe,Ni)
Fe TetrataeniteFeNi
Fe TroiliteFeS
Fe Fayalite-Forsterite Series
NiNickel
Ni Iron var. Kamacite(Fe,Ni)
Ni Taenite(Fe,Ni)
Ni TetrataeniteFeNi
CuCopper
Cu CopperCu

Fossils

There are 4 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.

Occurrences30
Youngest Fossil Listed372 Ma (Late/Upper Devonian)
Oldest Fossil Listed388 Ma (Middle Devonian)
Stratigraphic Units
UnitNo. OccurrencesAge
Amana Beds22379.5 - 376.1 Ma (Late/Upper Devonian)
Cedar Valley - Lithograph City - Independence Shale6382.7 - 372.2 Ma (Late/Upper Devonian)
Cedar Valley - Little Cedar - Rapid2387.7 - 382.7 Ma (Devonian)
Fossils from RegionClick here to show the list.
Accepted NameHierarchy Age
Devonoproductus
genus
Animalia : Brachiopoda : Strophomenata : Productida : Monticuliferidae : Devonoproductus379.5 - 376.1 Ma
Late/Upper Devonian
Douvillina
genus
Animalia : Brachiopoda : Strophomenata : Strophomenida : Douvillinidae : Douvillina382.7 - 372.2 Ma
Late/Upper Devonian
Douvillinaria
genus
Animalia : Brachiopoda : Strophomenata : Strophomenida : Douvillinidae : Douvillinaria379.5 - 376.1 Ma
Late/Upper Devonian
Nervostrophia
genus
Animalia : Brachiopoda : Strophomenata : Strophomenida : Leptostrophiidae : Nervostrophia382.7 - 372.2 Ma
Late/Upper Devonian
Sulcatostrophia
genus
Animalia : Brachiopoda : Strophomenata : Strophomenida : Douvillinidae : Sulcatostrophia379.5 - 376.1 Ma
Late/Upper Devonian
Coeloterorhynchus
genus
Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Pugnacidae : Coeloterorhynchus379.5 - 376.1 Ma
Late/Upper Devonian
Athyris
genus
Animalia : Brachiopoda : Rhynchonellata : Athyridida : Athyrididae : Athyris387.7 - 382.7 Ma
Devonian
Cyrtina
genus
Animalia : Brachiopoda : Rhynchonellata : Spiriferinida : Cyrtinidae : Cyrtina379.5 - 376.1 Ma
Late/Upper Devonian
Elita
genus
Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Elythidae : Elita379.5 - 376.1 Ma
Late/Upper Devonian
Indospirifer
genus
Animalia : Brachiopoda : Rhynchonellata : Spiriferida : Echinospiriferidae : Indospirifer379.5 - 376.1 Ma
Late/Upper Devonian
Atryparia (Costatrypa)
subgenus
Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : Atryparia : Atryparia (Costatrypa)379.5 - 376.1 Ma
Late/Upper Devonian
Pseudoatrypa
genus
Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : Pseudoatrypa387.7 - 376.1 Ma
Devonian
Spinatrypa
genus
Animalia : Brachiopoda : Rhynchonellata : Atrypida : Atrypidae : Spinatrypa382.7 - 372.2 Ma
Late/Upper Devonian
Palmatolepis
genus
Animalia : Chordata : Palmatolepidae : Palmatolepis379.5 - 376.1 Ma
Late/Upper Devonian
Schizophoria (Schizophoria) iowensis
species
Animalia : Brachiopoda : Rhynchonellata : Orthida : Schizophoriidae : Schizophoria : Schizophoria (Schizophoria) iowensis379.5 - 376.1 Ma
Late/Upper Devonian
Productella rugatula
species
Animalia : Brachiopoda : Strophomenata : Productida : Productellidae : Productella : Productella rugatula379.5 - 376.1 Ma
Late/Upper Devonian
Floweria prava
species
Animalia : Brachiopoda : Strophomenata : Orthotetida : Areostrophiidae : Floweria : Floweria prava379.5 - 376.1 Ma
Late/Upper Devonian
Stainbrookia infera
species
Animalia : Brachiopoda : Rhynchonellata : Orthida : Rhipidomellidae : Stainbrookia : Stainbrookia infera379.5 - 376.1 Ma
Late/Upper Devonian
Nervostrophia extensa
species
Animalia : Brachiopoda : Strophomenata : Strophomenida : Leptostrophiidae : Nervostrophia : Nervostrophia extensa379.5 - 376.1 Ma
Late/Upper Devonian
Douvillina arcuata
species
Animalia : Brachiopoda : Strophomenata : Strophomenida : Douvillinidae : Douvillina : Douvillina arcuata379.5 - 376.1 Ma
Late/Upper Devonian
Calvinaria bransoni
species
Animalia : Brachiopoda : Rhynchonellata : Rhynchonellida : Leiorhynchidae : Calvinaria : Calvinaria bransoni379.5 - 376.1 Ma
Late/Upper Devonian
Schizophoria amanaensis
species
Animalia : Brachiopoda : Rhynchonellata : Orthida : Schizophoriidae : Schizophoria : Schizophoria amanaensis382.7 - 372.2 Ma
Late/Upper Devonian
Manticoceras regulare
species
Animalia : Mollusca : Cephalopoda : Ammonoidea : Gephuroceratidae : Manticoceras : Manticoceras regulare379.5 - 376.1 Ma
Late/Upper Devonian
Fossil LocalitiesClick to show 4 fossil localities

Other Databases

Wikipedia:https://en.wikipedia.org/wiki/Iowa_County,_Iowa
Wikidata ID:Q486000
GeoNames ID:4831820

Localities in this Region

Other Regions, Features and Areas that Intersect


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.
 
and/or  
Mindat.org® is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Mindat® and mindat.org® are registered trademarks of the Hudson Institute of Mineralogy.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2026, except where stated. Most political location boundaries are © OpenStreetMap contributors. Mindat.org relies on the contributions of thousands of members and supporters. Founded in 2000 by Jolyon Ralph and Ida Chau.
Content on this site may not be used to train, fine-tune, or otherwise develop artificial intelligence or machine learning models without prior written permission - see our Terms & Conditions.
To cite: Ralph, J., Von Bargen, D., Martynov, P., Zhang, J., Que, X., Prabhu, A., Morrison, S. M., Li, W., Chen, W., & Ma, X. (2025). Mindat.org: The open access mineralogy database to accelerate data-intensive geoscience research. American Mineralogist, 110(6), 833–844. doi:10.2138/am-2024-9486.
Privacy Policy - Terms & Conditions - Contact Us / DMCA issues - Report a bug/vulnerability Current server date and time: September 3, 2026 14:39:58 Page updated: August 1, 2025 00:51:27
Go to top of page