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French Creek Mines, St. Peters, Warwick Township, Chester Co., Pennsylvania, USA

This page kindly sponsored by Dragon Minerals
Key
Lock Map
Latitude & Longitude (WGS84): 40° 10' 59'' North , 75° 43' 0'' West
Latitude & Longitude (decimal): 40.18333,-75.71667
GeoHash:G#: dr4ht50uc
Locality type:Group of Mines
Köppen climate type:Cfa : Humid subtropical climate


This mine includes the old Klein (lower) and Elizabeth (upper) mines and the Crossley pits. Located near St. Peters. Dumps have produced specimens to now.

The French Creek iron ores are a “Cornwall type” iron ore deposit (Lapham and Gray, 1972). Many examples of this type of iron deposit, including two very large ones, occur in the east-west neck that connects the Newark and Gettysburg Basins. This neck is filled by late Triassic age clastic and lacustrine sediments and has been heavily intruded by thick sheets of early Jurassic age diabase.

The margins of the neck are complexly faulted. In some places, the diabase intrudes the older country rocks on which the Triassic-Jurassic Basin has been superimposed. In most cases the intruded older rocks are Paleozoic shelf carbonates. In places where a diabase sheet intrudes into the complex basin margin and isolates a mass of carbonate rock above it the magnetite skarn of a Cornwall type iron deposit can develop. However, many aspects of the ore forming process remain to be resolved.

The French Creek ore deposit is a little different because the carbonate rock replaced by magnetite skarn is proterozoic marble (Smith, 1931). In the French Creek area, the southern margin of the Triassic sediments rests on the Precambrian metamorphic rocks of the Honeybrook upland. The Precambrian rocks are graphitic biotite gneiss with a few local pods or bands of marble. The marble occurrences are similar to those in the eastern block of the Reading Prong Highlands in New Jersey and the adjacent Hudson Highlands in New York.

At French Creek Jurassic diabase intrudes the Honeybrook rocks that included two significantly large pods of marble. The smaller marble lens was in close proximity to the diabase while only the lower part of the larger lens was in contact with the intrusive rocks. The marble was replaced to varying degrees by magnetite skarn.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

55 valid minerals.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Reference: Rocks & Min.:64:7.; Mineralogical Record, 25(2),pp:105-120.
'Amphibole Supergroup'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Mineralogical Record, 25(2),pp:105-120.
'Amphibole Supergroup var: Byssolite'
Formula: AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Reference: Mineralogical Record, 25(2),pp:105-120.
Andradite
Formula: Ca3Fe3+2(SiO4)3
Reference: Mineralogical Record, 25(2),pp:105-120.
Ankerite
Formula: Ca(Fe2+,Mg)(CO3)2
Reference: Mineralogical Record, 25(2),pp:105-120.
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Reference: Mineralogical Record, 25(2),pp:105-120.
'Apatite'
Reference: Mineralogical Record, 25(2),pp:105-120.
'Apophyllite'
Reference: Mineralogical Record, 25(2),pp:105-120.
Aragonite
Formula: CaCO3
Reference: Mineralogical Record, 25(2),pp:105-120.
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Mineralogical Record, 25(2),pp:105-120.
Azurite
Formula: Cu3(CO3)2(OH)2
Reference: Mineralogical Record, 25(2),pp:105-120.
'Biotite'
Reference: Mineralogical Record, 25(2),pp:105-120.
Bornite
Formula: Cu5FeS4
Reference: Mineralogical Record, 25(2),pp:105-120.
Calcite
Formula: CaCO3
Reference: Mineralogical Record, 25(2),pp:105-120.
'Chalcodite'
Formula: K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
Reference: Edith Trybalski
Chalcopyrite
Formula: CuFeS2
Reference: Rocks & Min.:64:7.; Mineralogical Record, 25(2),pp:105-120.
'Chlorite Group'
Reference: Mineralogical Record, 25(2),pp:105-120.
Chrysocolla
Formula: Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Reference: Mineralogical Record, 25(2),pp:105-120.
Chrysotile
Formula: Mg3(Si2O5)(OH)4
Cobaltite
Formula: CoAsS
Reference: Reed, Juliet C. (1976), Annotated Biblio. of Minerals New to the PA List 1965-1974, The Min. Soc. of PA, Inc.: 19 & 26; Grant (Feb, 1974), PA Mins. (PM)(134), Keystone Newsletter.; Mineralogical Record, 25(2),pp:105-120.
Copper
Formula: Cu
Reference: Mineralogical Record, 25(2),pp:105-120.
Covellite
Formula: CuS
Reference: Mineralogical Record, 25(2),pp:105-120.
Datolite
Formula: CaB(SiO4)(OH)
Reference: Mineralogical Record, 25(2),pp:105-120.
Diopside
Formula: CaMgSi2O6
Reference: Gordon, S.G. (1922) The Mineralogy of Pennsylvania. 255 pp., Philadelphia.
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Rocks & Min.:64:7.; Mineralogical Record, 25(2),pp:105-120.
Erythrite
Formula: Co3(AsO4)2 · 8H2O
Reference: Reed, Juliet C. (1976), Annotated Biblio. of Minerals New to the PA List 1965-1974, The Min. Soc. of PA, Inc.: 19 & 26; Grant (Feb, 1974), PA Mins. (PM)(134), Keystone Newsletter.; Mineralogical Record, 25(2),pp:105-120.
Fluorapophyllite-(K)
Formula: KCa4(Si8O20)(F,OH) · 8H2O
Fluorite
Formula: CaF2
Reference: Mineralogical Record, 25(2),pp:105-120.
Forsterite
Formula: Mg2SiO4
Reference: Mineralogical Record, 25(2),pp:105-120.
'Garnet Group'
Formula: X3Z2(SiO4)3
Graphite
Formula: C
Reference: Mineralogical Record, 25(2),pp:105-120.
Grossular
Formula: Ca3Al2(SiO4)3
Reference: Mineralogical Record, 25(2),pp:105-120.
Gypsum
Formula: CaSO4 · 2H2O
Reference: Mineralogical Record, 25(2),pp:105-120.
Hematite
Formula: Fe2O3
Reference: Rocks & Min.:64:7.; Mineralogical Record, 25(2),pp:105-120.
'Heulandite subgroup'
Reference: Mineralogical Record, 25(2),pp:105-120.
'Hornblende'
Reference: Mineralogical Record, 25(2),pp:105-120.
Ilmenite
Formula: Fe2+TiO3
Reference: Mineralogical Record, 25(2),pp:105-120.
Jarosite
Formula: KFe3+ 3(SO4)2(OH)6
Reference: Reed, Juliet C. (1976), Annotated Biblio. of Minerals New to the PA List 1965-1974, The Min. Soc. of PA, Inc.: 50-51; Grant, R.W. (Feb, 1974), PM(134).; Mineralogical Record, 25(2),pp:105-120.
Laumontite
Formula: CaAl2Si4O12 · 4H2O
Reference: Mineralogical Record, 25(2),pp:105-120.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Mineralogical Record, 25(2),pp:105-120.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Rocks & Min.:64:7.; Mineralogical Record, 25(2),pp:105-120.
Malachite
Formula: Cu2(CO3)(OH)2
Reference: Mineralogical Record, 25(2),pp:105-120.
Marialite
Formula: Na4Al3Si9O24Cl
Reference: Reed, Juliet C. (1976), Annotated Biblio. of Minerals New to the PA List 1965-1974, The Min. Soc. of PA, Inc.: 53; Gordon, Samuel G. (1922), Mineralogy of PA:89.
Mesolite
Formula: Na2Ca2Si9Al6O30 · 8H2O
Reference: Mineralogical Record, 25(2),pp:105-120.
Microcline
Formula: K(AlSi3O8)
Reference: Mineralogical Record, 25(2),pp:105-120.
Molybdenite
Formula: MoS2
Reference: Mineralogical Record, 25(2),pp:105-120.
Natrolite
Formula: Na2Al2Si3O10 · 2H2O
Reference: Mineralogical Record, 25(2),pp:105-120.
Orthoclase
Formula: K(AlSi3O8)
Reference: Rocks & Min.:64:7.; Mineralogical Record, 25(2),pp:105-120.
Pigeonite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: Mineralogical Record, 25(2),pp:105-120.
Pyrite
Formula: FeS2
Reference: Rocks & Min.:64:7.; Mineralogical Record, 25(2),pp:105-120.
Pyrite var: Cobaltoan Pyrite
Formula: (Fe,Co)S2
Reference: Min Rec v25 #2 pg. 118
'Pyroxene Group'
Pyrrhotite
Formula: Fe7S8
Reference: Mineralogical Record, 25(2),pp:105-120.
Quartz
Formula: SiO2
Reference: Mineralogical Record, 25(2),pp:105-120.
Rhodochrosite
Formula: MnCO3
Reference: Mineralogical Record, 25(2),pp:105-120.
Riebeckite
Formula: ◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Reference: Mineralogical Record, 25(2),pp:105-120.
'Scapolite'
Reference: Mineralogical Record, 25(2),pp:105-120.
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Mineralogical Record, 25(2),pp:105-120.
Siderite
Formula: FeCO3
Reference: Mineralogical Record, 25(2),pp:105-120.
Sphalerite
Formula: ZnS
Reference: Mineralogical Record, 25(2),pp:105-120.
Stibnite
Formula: Sb2S3
Reference: Mineralogical Record, 25(2),pp:105-120.
Stilbite-Ca
Formula: NaCa4[Al9Si27O72] · nH2O
Reference: Gordon, S.G. (1922) The Mineralogy of Pennsylvania. 255 pp., Philadelphia.
'Stilbite subgroup'
Stilpnomelane
Formula: (K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Reference: Mineralogical Record, 25(2),pp:105-120.
Talc
Formula: Mg3Si4O10(OH)2
Reference: Mineralogical Record, 25(2),pp:105-120.
'Thomsonite'
Reference: Mineralogical Record, 25(2),pp:105-120.
Thomsonite-Ca
Formula: NaCa2[Al5Si5O20] · 6H2O
Reference: No reference listed
Titanite
Formula: CaTi(SiO4)O
Reference: Mineralogical Record, 25(2),pp:105-120.
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: Mineralogical Record, 25(2),pp:105-120.
Zircon
Formula: Zr(SiO4)
Reference: Mineralogical Record, 25(2),pp:105-120.
Zoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Reference: Mineralogical Record, 25(2),pp:105-120.

List of minerals arranged by Strunz 10th Edition classification

Group 1 - Elements
Copper1.AA.05Cu
Graphite1.CB.05aC
Group 2 - Sulphides and Sulfosalts
'Bornite'2.BA.15Cu5FeS4
'Chalcopyrite'2.CB.10aCuFeS2
'Cobaltite'2.EB.25CoAsS
Covellite2.CA.05aCuS
Molybdenite2.EA.30MoS2
Pyrite2.EB.05aFeS2
var: Cobaltoan Pyrite2.EB.05a(Fe,Co)S2
Pyrrhotite2.CC.10Fe7S8
Sphalerite2.CB.05aZnS
Stibnite2.DB.05Sb2S3
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
Magnetite4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
'Ankerite'5.AB.10Ca(Fe2+,Mg)(CO3)2
'Aragonite'5.AB.15CaCO3
'Azurite'5.BA.05Cu3(CO3)2(OH)2
'Calcite'5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Rhodochrosite5.AB.05MnCO3
Siderite5.AB.05FeCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Gypsum7.CD.40CaSO4 · 2H2O
Jarosite7.BC.10KFe3+ 3(SO4)2(OH)6
Group 8 - Phosphates, Arsenates and Vanadates
Erythrite8.CE.40Co3(AsO4)2 · 8H2O
Group 9 - Silicates
'Actinolite'9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Andradite'9.AD.25Ca3Fe3+2(SiO4)3
'Anthophyllite'9.DE.05☐{Mg2}{Mg5}(Si8O22)(OH)2
'Augite'9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
'Chrysocolla'9.ED.20Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
'Chrysotile'9.ED.15Mg3(Si2O5)(OH)4
Datolite9.AJ.20CaB(SiO4)(OH)
Diopside9.DA.15CaMgSi2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fluorapophyllite-(K)9.EA.15KCa4(Si8O20)(F,OH) · 8H2O
Forsterite9.AC.05Mg2SiO4
Grossular9.AD.25Ca3Al2(SiO4)3
Laumontite9.GB.10CaAl2Si4O12 · 4H2O
Marialite9.FB.15Na4Al3Si9O24Cl
Mesolite9.GA.05Na2Ca2Si9Al6O30 · 8H2O
Microcline9.FA.30K(AlSi3O8)
Natrolite9.GA.05Na2Al2Si3O10 · 2H2O
Orthoclase9.FA.30K(AlSi3O8)
Pigeonite9.DA.10(CaxMgyFez)(Mgy1Fez1)Si2O6
Riebeckite9.DE.25◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
Schorl9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Stilbite-Ca9.GE.10NaCa4[Al9Si27O72] · nH2O
Stilpnomelane9.EG.40(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Talc9.EC.05Mg3Si4O10(OH)2
Thomsonite-Ca9.GA.10NaCa2[Al5Si5O20] · 6H2O
Titanite9.AG.15CaTi(SiO4)O
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Zircon9.AD.30Zr(SiO4)
Zoisite9.BG.10{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Unclassified Minerals, Rocks, etc.
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Byssolite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-
'Apophyllite'-
'Biotite'-
'Chalcodite'-K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
'Chlorite Group'-
Garnet Group-X3Z2(SiO4)3
Heulandite subgroup-
Hornblende-
Limonite-(Fe,O,OH,H2O)
Pyroxene Group-
Scapolite-
Stilbite subgroup-
Thomsonite-

List of minerals arranged by Dana 8th Edition classification

Group 1 - NATIVE ELEMENTS AND ALLOYS
Metals, other than the Platinum Group
Copper1.1.1.3Cu
Semi-metals and non-metals
Graphite1.3.6.2C
Group 2 - SULFIDES
AmBnXp, with (m+n):p = 3:2
Bornite2.5.2.1Cu5FeS4
AmXp, with m:p = 1:1
Covellite2.8.12.1CuS
Pyrrhotite2.8.10.1Fe7S8
Sphalerite2.8.2.1ZnS
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 2:3
Stibnite2.11.2.1Sb2S3
AmBnXp, with (m+n):p = 1:2
Cobaltite2.12.3.1CoAsS
Molybdenite2.12.10.1MoS2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Rhodochrosite14.1.1.4MnCO3
Siderite14.1.1.3FeCO3
AB(XO3)2
Ankerite14.2.1.2Ca(Fe2+,Mg)(CO3)2
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Azurite16a.2.1.1Cu3(CO3)2(OH)2
Malachite16a.3.1.1Cu2(CO3)(OH)2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Gypsum29.6.3.1CaSO4 · 2H2O
Group 30 - ANHYDROUS SULFATES CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Jarosite30.2.5.1KFe3+ 3(SO4)2(OH)6
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
A3(XO4)2·xH2O
Erythrite40.3.6.3Co3(AsO4)2 · 8H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Andradite51.4.3b.1Ca3Fe3+2(SiO4)3
Grossular51.4.3b.2Ca3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 54 - NESOSILICATES Borosilicates and Some Beryllosilicates
Borosilicates and Some Beryllosilicates with B in [4] coordination
Datolite54.2.1a.1CaB(SiO4)(OH)
Group 58 - SOROSILICATES Insular, Mixed, Single, and Larger Tetrahedral Groups
Insular, Mixed, Single, and Larger Tetrahedral Groups with cations in [6] and higher coordination; single and double groups (n = 1, 2)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Zoisite58.2.1b.1{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with borate groups
Schorl61.3.1.10Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Diopside65.1.3a.1CaMgSi2O6
Pigeonite65.1.1.4(CaxMgyFez)(Mgy1Fez1)Si2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Anthophyllite66.1.2.1☐{Mg2}{Mg5}(Si8O22)(OH)2
Tremolite66.1.3a.1☐{Ca2}{Mg5}(Si8O22)(OH)2
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 1:1 layers
Chrysotile71.1.5.1Mg3(Si2O5)(OH)4
Sheets of 6-membered rings with 2:1 layers
Talc71.2.1.3Mg3Si4O10(OH)2
Group 72 - PHYLLOSILICATES Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings with 3-, 4-, or 5-membered rings and 8-membered rings
Fluorapophyllite-(K)72.3.1.1KCa4(Si8O20)(F,OH) · 8H2O
Group 74 - PHYLLOSILICATES Modulated Layers
Modulated Layers with joined islands
Stilpnomelane74.1.1.1(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Modulated Layers with joined strips
Chrysocolla74.3.2.1Cu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Group 76 - TECTOSILICATES Al-Si Framework
Al-Si Framework with Al-Si frameworks
Microcline76.1.1.5K(AlSi3O8)
Orthoclase76.1.1.1K(AlSi3O8)
Al-Si Framework with other Be/Al/Si frameworks
Marialite76.3.1.1Na4Al3Si9O24Cl
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Laumontite77.1.1.4CaAl2Si4O12 · 4H2O
Mesolite77.1.5.4Na2Ca2Si9Al6O30 · 8H2O
Natrolite77.1.5.1Na2Al2Si3O10 · 2H2O
Stilbite-Ca77.1.4.3NaCa4[Al9Si27O72] · nH2O
Unclassified Minerals, Rocks, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Amphibole Supergroup'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'var: Byssolite'-AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
'Apatite'-
'Apophyllite'-
Aragonite-CaCO3
'Biotite'-
'Chalcodite'-K(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
'Chlorite Group'-
'Garnet Group'-X3Z2(SiO4)3
'Heulandite subgroup'-
'Hornblende'-
'Limonite'-(Fe,O,OH,H2O)
Pyrite
var: Cobaltoan Pyrite
-(Fe,Co)S2
'Pyroxene Group'-
Riebeckite-◻[Na2][Fe2+3Fe3+2]Si8O22(OH)2
'Scapolite'-
'Stilbite subgroup'-
'Thomsonite'-
Thomsonite-Ca-NaCa2[Al5Si5O20] · 6H2O

List of minerals for each chemical element

HHydrogen
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
H AzuriteCu3(CO3)2(OH)2
H Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
H ChalcoditeK(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
H ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
H ChrysotileMg3(Si2O5)(OH)4
H DatoliteCaB(SiO4)(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H ErythriteCo3(AsO4)2 · 8H2O
H Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
H GypsumCaSO4 · 2H2O
H JarositeKFe3+ 3(SO4)2(OH)6
H LaumontiteCaAl2Si4O12 · 4H2O
H Limonite(Fe,O,OH,H2O)
H MalachiteCu2(CO3)(OH)2
H MesoliteNa2Ca2Si9Al6O30 · 8H2O
H NatroliteNa2Al2Si3O10 · 2H2O
H Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Stilbite-CaNaCa4[Al9Si27O72] · nH2O
H Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
H TalcMg3Si4O10(OH)2
H Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
BBoron
B DatoliteCaB(SiO4)(OH)
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C AnkeriteCa(Fe2+,Mg)(CO3)2
C AragoniteCaCO3
C AzuriteCu3(CO3)2(OH)2
C CalciteCaCO3
C GraphiteC
C MalachiteCu2(CO3)(OH)2
C RhodochrositeMnCO3
C SideriteFeCO3
OOxygen
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O AndraditeCa3Fe23+(SiO4)3
O AnkeriteCa(Fe2+,Mg)(CO3)2
O Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
O AragoniteCaCO3
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O AzuriteCu3(CO3)2(OH)2
O Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
O CalciteCaCO3
O ChalcoditeK(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
O ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
O ChrysotileMg3(Si2O5)(OH)4
O DatoliteCaB(SiO4)(OH)
O DiopsideCaMgSi2O6
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O ErythriteCo3(AsO4)2 · 8H2O
O Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
O ForsteriteMg2SiO4
O Garnet GroupX3Z2(SiO4)3
O GrossularCa3Al2(SiO4)3
O GypsumCaSO4 · 2H2O
O HematiteFe2O3
O IlmeniteFe2+TiO3
O JarositeKFe3+ 3(SO4)2(OH)6
O LaumontiteCaAl2Si4O12 · 4H2O
O Limonite(Fe,O,OH,H2O)
O MagnetiteFe2+Fe23+O4
O MalachiteCu2(CO3)(OH)2
O MarialiteNa4Al3Si9O24Cl
O MesoliteNa2Ca2Si9Al6O30 · 8H2O
O MicroclineK(AlSi3O8)
O NatroliteNa2Al2Si3O10 · 2H2O
O OrthoclaseK(AlSi3O8)
O Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
O QuartzSiO2
O RhodochrositeMnCO3
O Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O SideriteFeCO3
O Stilbite-CaNaCa4[Al9Si27O72] · nH2O
O Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
O TalcMg3Si4O10(OH)2
O Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
O TitaniteCaTi(SiO4)O
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O ZirconZr(SiO4)
O Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
FFluorine
F Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
F Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
F Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
F FluoriteCaF2
NaSodium
Na MarialiteNa4Al3Si9O24Cl
Na MesoliteNa2Ca2Si9Al6O30 · 8H2O
Na NatroliteNa2Al2Si3O10 · 2H2O
Na Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Na Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Na Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Na Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg AnkeriteCa(Fe2+,Mg)(CO3)2
Mg Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg ChalcoditeK(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
Mg ChrysotileMg3(Si2O5)(OH)4
Mg DiopsideCaMgSi2O6
Mg ForsteriteMg2SiO4
Mg Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Mg TalcMg3Si4O10(OH)2
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
AlAluminium
Al Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Al ChalcoditeK(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
Al ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al GrossularCa3Al2(SiO4)3
Al LaumontiteCaAl2Si4O12 · 4H2O
Al MarialiteNa4Al3Si9O24Cl
Al MesoliteNa2Ca2Si9Al6O30 · 8H2O
Al MicroclineK(AlSi3O8)
Al NatroliteNa2Al2Si3O10 · 2H2O
Al OrthoclaseK(AlSi3O8)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Al Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Al Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Al Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
SiSilicon
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si AndraditeCa3Fe23+(SiO4)3
Si Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Si ChalcoditeK(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
Si ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Si ChrysotileMg3(Si2O5)(OH)4
Si DatoliteCaB(SiO4)(OH)
Si DiopsideCaMgSi2O6
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Si ForsteriteMg2SiO4
Si Garnet GroupX3Z2(SiO4)3
Si GrossularCa3Al2(SiO4)3
Si LaumontiteCaAl2Si4O12 · 4H2O
Si MarialiteNa4Al3Si9O24Cl
Si MesoliteNa2Ca2Si9Al6O30 · 8H2O
Si MicroclineK(AlSi3O8)
Si NatroliteNa2Al2Si3O10 · 2H2O
Si OrthoclaseK(AlSi3O8)
Si Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si QuartzSiO2
Si Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Si Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Si TalcMg3Si4O10(OH)2
Si Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Si TitaniteCaTi(SiO4)O
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si ZirconZr(SiO4)
Si Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
SSulfur
S BorniteCu5FeS4
S ChalcopyriteCuFeS2
S CobaltiteCoAsS
S Pyrite (var: Cobaltoan Pyrite)(Fe,Co)S2
S CovelliteCuS
S GypsumCaSO4 · 2H2O
S JarositeKFe3+ 3(SO4)2(OH)6
S MolybdeniteMoS2
S PyriteFeS2
S PyrrhotiteFe7S8
S SphaleriteZnS
S StibniteSb2S3
ClChlorine
Cl Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Cl Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Cl MarialiteNa4Al3Si9O24Cl
KPotassium
K ChalcoditeK(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
K Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
K JarositeKFe3+ 3(SO4)2(OH)6
K MicroclineK(AlSi3O8)
K OrthoclaseK(AlSi3O8)
K Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca AndraditeCa3Fe23+(SiO4)3
Ca AnkeriteCa(Fe2+,Mg)(CO3)2
Ca AragoniteCaCO3
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca CalciteCaCO3
Ca DatoliteCaB(SiO4)(OH)
Ca DiopsideCaMgSi2O6
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Fluorapophyllite-(K)KCa4(Si8O20)(F,OH) · 8H2O
Ca FluoriteCaF2
Ca GrossularCa3Al2(SiO4)3
Ca GypsumCaSO4 · 2H2O
Ca LaumontiteCaAl2Si4O12 · 4H2O
Ca MesoliteNa2Ca2Si9Al6O30 · 8H2O
Ca Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Stilbite-CaNaCa4[Al9Si27O72] · nH2O
Ca Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
Ca Thomsonite-CaNaCa2[Al5Si5O20] · 6H2O
Ca TitaniteCaTi(SiO4)O
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca Zoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
TiTitanium
Ti Amphibole SupergroupAX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti Amphibole Supergroup (var: Byssolite)AX2Z5((Si,Al,Ti)8O22)(OH,F,Cl,O)2
Ti IlmeniteFe2+TiO3
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn RhodochrositeMnCO3
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe AndraditeCa3Fe23+(SiO4)3
Fe AnkeriteCa(Fe2+,Mg)(CO3)2
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe BorniteCu5FeS4
Fe ChalcoditeK(Fe3+,Mg,Fe2+)8(Si,Al)12(O,OH)27
Fe ChalcopyriteCuFeS2
Fe Pyrite (var: Cobaltoan Pyrite)(Fe,Co)S2
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3
Fe JarositeKFe3+ 3(SO4)2(OH)6
Fe Limonite(Fe,O,OH,H2O)
Fe MagnetiteFe2+Fe23+O4
Fe Pigeonite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
Fe Riebeckite◻[Na2][Fe32+Fe23+]Si8O22(OH)2
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe SideriteFeCO3
Fe Stilpnomelane(K,Ca,Na)(Fe2+,Mg,Al)8(Si,Al)12(O,OH)36 · nH2O
CoCobalt
Co CobaltiteCoAsS
Co Pyrite (var: Cobaltoan Pyrite)(Fe,Co)S2
Co ErythriteCo3(AsO4)2 · 8H2O
CuCopper
Cu AzuriteCu3(CO3)2(OH)2
Cu BorniteCu5FeS4
Cu ChalcopyriteCuFeS2
Cu ChrysocollaCu2-xAlx(H2-xSi2O5)(OH)4 · nH2O
Cu CopperCu
Cu CovelliteCuS
Cu MalachiteCu2(CO3)(OH)2
ZnZinc
Zn SphaleriteZnS
AsArsenic
As CobaltiteCoAsS
As ErythriteCo3(AsO4)2 · 8H2O
ZrZirconium
Zr ZirconZr(SiO4)
MoMolybdenum
Mo MolybdeniteMoS2
SbAntimony
Sb StibniteSb2S3

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

Jurassic
145 - 201.3 Ma



ID: 2784146
Diabase

Age: Jurassic (145 - 201.3 Ma)

Description: Medium- to coarse-grained, quartz-normative tholeiite; composed of labradorite and various pyroxenes; occurs as dikes, sheets, and a few small flows. Includes the dark-gray York Haven Diabase (high titanium oxide) and the slightly younger Rossville Diabase (low titanium oxide). In chilled margins, the Rossville is distinguished from the York Haven by its lighter gray color and distinctive, sparse, centimeter-sized calcic-plagioclase phenocrysts.

Comments: Digital map differences from 1980 map: age changed from Triassic to Jurassic; map symbol changed from Trd (printed) to Jd (digital). See digital map reference. 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:{basalt}

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]

Triassic
201.3 - 251.902 Ma



ID: 3186144
Mesozoic sedimentary rocks

Age: Triassic (201.3 - 251.902 Ma)

Comments: Newark Graben System; Newark-Gettysburg Basin

Lithology: Shale,conglomerate,quartz-feldspar sandstone,siltstone,limestone

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)
Grant (1974), Pennsylvania Minerals (PM)(134) (February), Keystone Newsletter.
Lapham, D.M., and Gray, C., (1972), Geology and origin of the Triassic magnetite deposit and diabase at Cornwall, Pennsylvania: Pennsylvania Topographic and Geologic Survey Mineral Resources Report M56, 343 pp.
Reed, Juliet C. (1976), Annotated Bibliography of Minerals New to the Pennsylvania List 1965-1974, The Mineralogical Society of Pennsylvania, Inc.: 19 & 26, 50-51, 53.
Rocks & Minerals (1989): 64(7).
Smith, L., 1931, Magnetite deposits of French Creek, Pennsylvania: Pennsylvania Geol. Survey, 4th ser. Bull. M 14, pp. 35-37.

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