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General Trimble's Mine, East Whiteland Township, Chester Co., Pennsylvania, USAi
Regional Level Types
General Trimble's MineMine
East Whiteland TownshipTownship
Chester Co.County
PennsylvaniaState
USACountry

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Latitude & Longitude (WGS84): 40° 0' 50'' North , 75° 38' 14'' West
Latitude & Longitude (decimal): 40.01389,-75.63722
GeoHash:G#: dr45wu69u
Locality type:Mine
Köppen climate type:Cfa : Humid subtropical climate
Nearest Settlements:
PlacePopulationDistance
Exton4,842 (2017)2.2km
Lionville6,189 (2017)4.8km
Downingtown7,946 (2017)5.7km
Eagleview1,644 (2017)6.3km
West Chester19,842 (2017)6.4km


A 19th Century Iron mine, located in East Whiteland Township (an historical locale) near Downingtown, which exploited residual deposits of Goethite and Limonite that formed along Shenandoah Limestone.

Located about 1/4 mile NW of the railway Planebrook Station.

Note on the mineral list: for "coeruleolactite" see references and information given for planerite, all turquoise group minerals are found to be planerite at this locality.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


6 valid minerals. 1 erroneous literature entry.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Gibbsite4.FE.10Al(OH)3
Goethite4.00.α-Fe3+O(OH)
Hematite4.CB.05Fe2O3
Group 8 - Phosphates, Arsenates and Vanadates
Matulaite8.DK.30(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2O
Planerite8.DD.15Al6(PO4)2(HPO4)2(OH)8 · 4 H2O
Wavellite8.DC.50Al3(PO4)2(OH,F)3 · 5H2O
Unclassified Minerals, Rocks, etc.
'Coeruleolactite' ?-
'Limonite'-(Fe,O,OH,H2O)

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
X(OH)3
Gibbsite6.3.1.1Al(OH)3
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)7(XO4)4Zq·xH2O
'Coeruleolactite' ?42.9.3.2
Planerite42.9.3.6Al6(PO4)2(HPO4)2(OH)8 · 4 H2O
A3(XO4)2Zq·xH2O
Wavellite42.10.2.1Al3(PO4)2(OH,F)3 · 5H2O
Miscellaneous
Matulaite42.13.3.1(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2O
Unclassified Minerals, Mixtures, etc.
'Limonite'-(Fe,O,OH,H2O)

List of minerals for each chemical element

HHydrogen
H WavelliteAl3(PO4)2(OH,F)3 · 5H2O
H Matulaite(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2O
H Goethiteα-Fe3+O(OH)
H Limonite(Fe,O,OH,H2O)
H GibbsiteAl(OH)3
H PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
OOxygen
O HematiteFe2O3
O WavelliteAl3(PO4)2(OH,F)3 · 5H2O
O Matulaite(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2O
O Goethiteα-Fe3+O(OH)
O Limonite(Fe,O,OH,H2O)
O GibbsiteAl(OH)3
O PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
FFluorine
F WavelliteAl3(PO4)2(OH,F)3 · 5H2O
AlAluminium
Al WavelliteAl3(PO4)2(OH,F)3 · 5H2O
Al Matulaite(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2O
Al GibbsiteAl(OH)3
Al PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
PPhosphorus
P WavelliteAl3(PO4)2(OH,F)3 · 5H2O
P Matulaite(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2O
P PlaneriteAl6(PO4)2(HPO4)2(OH)8 · 4 H2O
FeIron
Fe HematiteFe2O3
Fe Matulaite(Fe3+,Al)Al7(PO4)4(PO3OH)2(OH)8(H2O)8 · 8H2O
Fe Goethiteα-Fe3+O(OH)
Fe Limonite(Fe,O,OH,H2O)

Regional Geology

This geological map and associated information on rock units at or nearby to the coordinates given for this locality is based on relatively small scale geological maps provided by various national Geological Surveys. This does not necessarily represent the complete geology at this locality but it gives a background for the region in which it is found.

Click on geological units on the map for more information. Click here to view full-screen map on Macrostrat.org

Paleozoic
251.902 - 541 Ma



ID: 3025822
Octoraro Formation

Age: Phanerozoic (251.902 - 541 Ma)

Stratigraphic Name: Octoraro Formation

Description: Includes albite-chlorite schist, phyllite, some hornblende gneiss, and granitized members.

Comments: Digital map differences from 1980 printed map: name and map symbol changed from (Wissahickon Formation, albite-chlorite schist) (Xwc). Original map source: Pennsylvania Bureau of Topographic and Geologic Survey, Department of Conservation and Natural Resources, Miles, C.E., and Whitfield, T.G., compilers, 2001, Bedrock Geology of Pennsylvania, edition: 1.0, digital map, scale 1:250,000.

Lithology: Major:{schist,phyllite}, Minor:{hornblende gneiss,granitic}

Reference: Horton, J.D., C.A. San Juan, and D.B. Stoeser. The State Geologic Map Compilation (SGMC) geodatabase of the conterminous United States. doi: 10.3133/ds1052. U.S. Geological Survey Data Series 1052. [133]

Cambrian
485.4 - 541 Ma



ID: 3192822
Paleozoic sedimentary rocks

Age: Cambrian (485.4 - 541 Ma)

Lithology: Sedimentary rocks

Reference: Chorlton, L.B. Generalized geology of the world: bedrock domains and major faults in GIS format: a small-scale world geology map with an extended geological attribute database. doi: 10.4095/223767. Geological Survey of Canada, Open File 5529. [154]

Data and map coding provided by Macrostrat.org, used under Creative Commons Attribution 4.0 License

References

Sort by

Year (asc) Year (desc) Author (A-Z) Author (Z-A)
Dana, E.S. (1892) System of Mineralogy, 6th. Edition, New York: 1068.
Gordon, Samuel G. (1922) The Mineralogy of Pennsylvania: 170.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II: 961, 964.
Foord, E.E. & Taggart, J.E. (1998): A reexamination of the turquoise group; the mineral aheylite, planerite (redefined), turquoise and coeruleolactite. Mineralogical Magazine, 62, 93-111.


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