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

Jenkins Mine (Jenkins Corner; North Rock Springs), Fulton Township, Lancaster County, Pennsylvania, USAi
Regional Level Types
Jenkins Mine (Jenkins Corner; North Rock Springs)Mine
Fulton TownshipTownship
Lancaster CountyCounty
PennsylvaniaState
USACountry

This page is currently not sponsored. Click here to sponsor this page.
PhotosMapsSearch
01201280017272058776142.jpg
One of Three Shafts

Jenkins Mine, Fulton Township, Lancaster County, Pennsylvania, USA
07282230017272058773265.jpg
One of Three Shafts

Jenkins Mine, Fulton Township, Lancaster County, Pennsylvania, USA
01201280017272058776142.jpg
One of Three Shafts

Jenkins Mine, Fulton Township, Lancaster County, Pennsylvania, USA
07282230017272058773265.jpg
One of Three Shafts

Jenkins Mine, Fulton Township, Lancaster County, Pennsylvania, USA
01201280017272058776142.jpg
One of Three Shafts

Jenkins Mine, Fulton Township, Lancaster County, Pennsylvania, USA
07282230017272058773265.jpg
One of Three Shafts

Jenkins Mine, Fulton Township, Lancaster County, Pennsylvania, USA
Latitude & Longitude (WGS84):
39° 43' 50'' North , 76° 9' 26'' West
Latitude & Longitude (decimal):
39.73083,-76.15750
GRN:
N27W42
Type:
Mine
Köppen climate type:
Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Wakefield609 (2017)5.1km
Little Britain372 (2017)6.4km
Rising Sun2,859 (2017)8.9km
Darlington409 (2011)10.9km
Delta724 (2017)14.5km
Mindat Locality ID:
28607
Long-form identifier:
mindat:1:2:28607:4
GUID (UUID V4):
0


A chromite mine on Rock Springs Run, one mile north of Rock Springs, Maryland.

Select Mineral List Type

Standard Detailed Gallery Strunz Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded at this locality.


Mineral List


8 valid minerals.

Rock Types Recorded

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

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

ⓘ Antigorite
Formula: Mg3(Si2O5)(OH)4
ⓘ Antigorite var. Williamsite
Formula: Mg3(Si2O5)(OH)4
ⓘ Chromite
Formula: Fe2+Cr3+2O4
ⓘ Chrysotile
Formula: Mg3(Si2O5)(OH)4
ⓘ Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
ⓘ Clinochlore var. Chromium-bearing Clinochlore
Formula: Mg5(Al,Cr)2Si3O10(OH)8
ⓘ 'Deweylite'
ⓘ 'Genthite'
ⓘ Hydromagnesite
Formula: Mg5(CO3)4(OH)2 · 4H2O
ⓘ Magnesite
Formula: MgCO3
ⓘ Quartz
Formula: SiO2
ⓘ Quartz var. Chalcedony
Formula: SiO2
ⓘ 'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4
ⓘ Zaratite
Formula: Ni3(CO3)(OH)4 · 4H2O ?

Gallery:

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
ⓘChromite4.BB.05Fe2+Cr3+2O4
ⓘQuartz
var. Chalcedony		4.DA.05SiO2
ⓘ4.DA.05SiO2
Group 5 - Nitrates and Carbonates
ⓘMagnesite5.AB.05MgCO3
ⓘHydromagnesite5.DA.05Mg5(CO3)4(OH)2 · 4H2O
ⓘZaratite5.DA.15Ni3(CO3)(OH)4 · 4H2O ?
Group 9 - Silicates
ⓘChrysotile9.00.Mg3(Si2O5)(OH)4
ⓘClinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
ⓘvar. Chromium-bearing Clinochlore9.EC.55Mg5(Al,Cr)2Si3O10(OH)8
ⓘAntigorite9.ED.15Mg3(Si2O5)(OH)4
ⓘvar. Williamsite9.ED.15Mg3(Si2O5)(OH)4
Unclassified
ⓘ'Deweylite'-
ⓘ'Serpentine Subgroup'-D3[Si2O5](OH)4
ⓘ'Genthite'-

List of minerals for each chemical element

HHydrogen
Hⓘ AntigoriteMg3(Si2O5)(OH)4
Hⓘ ChrysotileMg3(Si2O5)(OH)4
Hⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Hⓘ HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
Hⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Hⓘ ZaratiteNi3(CO3)(OH)4 · 4H2O ?
Hⓘ Serpentine SubgroupD3[Si2O5](OH)4
Hⓘ Antigorite var. WilliamsiteMg3(Si2O5)(OH)4
CCarbon
Cⓘ HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
Cⓘ MagnesiteMgCO3
Cⓘ ZaratiteNi3(CO3)(OH)4 · 4H2O ?
OOxygen
Oⓘ AntigoriteMg3(Si2O5)(OH)4
Oⓘ Quartz var. ChalcedonySiO2
Oⓘ ChrysotileMg3(Si2O5)(OH)4
Oⓘ ChromiteFe2+Cr23+O4
Oⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Oⓘ HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
Oⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Oⓘ MagnesiteMgCO3
Oⓘ QuartzSiO2
Oⓘ ZaratiteNi3(CO3)(OH)4 · 4H2O ?
Oⓘ Serpentine SubgroupD3[Si2O5](OH)4
Oⓘ Antigorite var. WilliamsiteMg3(Si2O5)(OH)4
MgMagnesium
Mgⓘ AntigoriteMg3(Si2O5)(OH)4
Mgⓘ ChrysotileMg3(Si2O5)(OH)4
Mgⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Mgⓘ HydromagnesiteMg5(CO3)4(OH)2 · 4H2O
Mgⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Mgⓘ MagnesiteMgCO3
Mgⓘ Antigorite var. WilliamsiteMg3(Si2O5)(OH)4
AlAluminium
Alⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Alⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
SiSilicon
Siⓘ AntigoriteMg3(Si2O5)(OH)4
Siⓘ Quartz var. ChalcedonySiO2
Siⓘ ChrysotileMg3(Si2O5)(OH)4
Siⓘ ClinochloreMg5Al(AlSi3O10)(OH)8
Siⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
Siⓘ QuartzSiO2
Siⓘ Serpentine SubgroupD3[Si2O5](OH)4
Siⓘ Antigorite var. WilliamsiteMg3(Si2O5)(OH)4
CrChromium
Crⓘ ChromiteFe2+Cr23+O4
Crⓘ Clinochlore var. Chromium-bearing ClinochloreMg5(Al,Cr)2Si3O10(OH)8
FeIron
Feⓘ ChromiteFe2+Cr23+O4
NiNickel
Niⓘ ZaratiteNi3(CO3)(OH)4 · 4H2O ?

Other Databases

Link to USGS MRDS:10299733

Other Regions, Features and Areas containing this locality

North AmericaContinent
North America PlateTectonic Plate
USA

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.

References

Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania. Special Publication 1. The Academy of Natural Sciences of Philadelphia p.204
Pearre, N. C.; Van Heyl, A. (1960) Chromite and other mineral deposits in serpentine rocks of the Piedmont Upland, Maryland, Pennsylvania, and Delaware. Bulletin 1082k. US Geological Survey doi:10.3133/b1082k pp.707-833
Quick NavTopCommoditiesMineral ListRock TypesOther DatabasesOther RegionsReferences
 
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 05:19:43 Page updated: August 28, 2025 08:09:19
Go to top of page