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Fletcher Mine, Groton, Grafton Co., New Hampshire, USA

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Latitude & Longitude (WGS84): 43° 45' 34'' North , 71° 49' 38'' West
Latitude & Longitude (decimal): 43.75972,-71.82750
GeoHash:G#: drubvw0yc
Locality type:Mine
Köppen climate type:Dfb : Warm-summer humid continental climate


A former open pit mica and feldspar mine.

Mineralization is granite pegmatite, Grafton field. Located near the village of North Groton. (Has produced remarkable examples of hydroxylherderite, strengite, phosphosiderite, strunzite and other pegmatite phosphates.)

Local rocks include rocks of the Littleton Formation, Upper unnamed member.

PLEASE TAKE NOTICE: The Fletcher Mine has been closed to the public since the 1970s. The property is posted against tresspassers. Prosecution will be the result of trespassing. Adjoining property with mines is also privately owned. Please respect wishes of property owners concerned with your safety in mind.

Alternative Label Names

This is a list of additional names that have been recorded for mineral labels associated with this locality in the minID database. This may include previous versions of the locality name hierarchy from mindat.org, data entry errors, and it may also include unconfirmed sublocality names or other names that can only be matched to this level.

Fletcher Mine
Fletcher Mine, Groton, New Hampshire, USA
Fletcher Mine, New Hampshire, USA
Fletcher Mine, No. Groton, New Hampshire, USA
Fletcher Mine, North Groton, New Hampshire
Fletcher Mine, North Groton, New Hampshire, USA
Fletcher X, Groton, NH, USA
Fletscher mine, North Groton, New Hampshire, USA

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


40 valid minerals. 1 (TL) - type locality of valid minerals. 4 erroneous literature entries.

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Rocks & Minerals: 80: 252.
Almandine
Formula: Fe2+3Al2(SiO4)3
Reference: USGS Prof Paper 255
Arsenopyrite
Formula: FeAsS
Reference: No reference listed
Autunite
Formula: Ca(UO2)2(PO4)2 · 11H2O
Reference: No reference listed
Beraunite
Formula: Fe2+Fe3+5(PO4)4(OH)5 · 6H2O
Reference: Rocks & Minerals: 80: 252.
Bermanite
Formula: Mn2+Mn3+2(PO4)2(OH)2 · 4H2O
Reference: Nashua Mineralogical Society Disp. Cat. 1995.; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Bertrandite
Formula: Be4(Si2O7)(OH)2
Reference: No reference listed
Beryl
Formula: Be3Al2(Si6O18)
Reference: Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index; USGS Prof Paper 255
'Biotite'
Reference: USGS Prof Paper 255
Brazilianite
Formula: NaAl3(PO4)2(OH)4
Reference: Rocks & Minerals: 80: 252.
Childrenite
Formula: Fe2+Al(PO4)(OH)2 · H2O
Reference: No reference listed
Dufrénite
Formula: Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
Description: Mis-identified rockbridgeite
Reference: Meyers & Stewart (1956) Geology of New Hampshire, part III.
Eleonorite
Formula: Fe3+6(PO4)4O(OH)4 · 6H2O
Reference: Robert Whitmore collection
Eosphorite
Formula: Mn2+Al(PO4)(OH)2 · H2O
Reference: Van King
Frondelite
Formula: Mn2+Fe3+4(PO4)3(OH)5
Reference: 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: 868; Korbel & Novak (1999) Min. Encylopaedia, p.163.; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Graftonite
Formula: Fe2+Fe2+2(PO4)2
Reference: No reference listed
Herderite
Formula: CaBePO4(F,OH)
Reference: Leavens, P., Dunn, P., and Gaines, R., 1978, Compositional and Refractive Index Variations of the herderite-hydroxyl-herderite series, American Mineralogist, v. 63, p. 913-917.
Heterosite
Formula: (Fe3+,Mn3+)PO4
Reference: No reference listed
Hureaulite
Formula: (Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
Reference: Rocks & Minerals: 80: 252.
Hydroxylherderite
Formula: CaBe(PO4)(OH,F)
Reference: American Mineralogist: 63: 913-917.
Jahnsite-(CaMnFe) (TL)
Formula: {Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Reference: Moore and Ito (1978), Mineralogical Magazine: 42: 309-323 [316].
Jahnsite-(CaMnMg)
Formula: {Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Reference: No reference listed
Laueite
Formula: Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
Reference: Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Leucophosphite
Formula: KFe3+2(PO4)2(OH) · 2H2O
Reference: Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Ludlamite
Formula: Fe2+3(PO4)2 · 4H2O
Reference: Rocks & Minerals: 80: 252.
Meta-autunite
Formula: Ca(UO2)2(PO4)2 · 6-8H2O
Reference: No reference listed
Metatorbernite
Formula: Cu(UO2)2(PO4)2 · 8H2O
Reference: Scott Whittemore collection
Microcline
Formula: K(AlSi3O8)
Reference: USGS Prof Paper 255
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: USGS Prof Paper 255
Paravauxite
Formula: Fe2+Al2(PO4)2(OH)2 · 8H2O
Description: No data.
Reference: Nashua Mineralogical Society Disp. Cat., 1995.; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Phosphosiderite
Formula: FePO4 · 2H2O
Reference: 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: 771.; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Purpurite
Formula: (Mn3+,Fe3+)PO4
Reference: USGS Prof Paper 255
Quartz
Formula: SiO2
Reference: USGS Prof Paper 255
Quartz var: Smoky Quartz
Formula: SiO2
Reference: No reference listed
Rockbridgeite
Formula: Fe2+Fe3+4(PO4)3(OH)5
Reference: 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: 868.; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Sillimanite
Formula: Al2(SiO4)O
Reference: USGS Prof Paper 255
Stewartite
Formula: Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
Reference: 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: 730.; Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Strengite
Formula: FePO4 · 2H2O
Reference: Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Strunzite
Formula: Mn2+Fe3+2(PO4)2(OH)2 · 6H2O
Reference: Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Tavorite
Formula: LiFe3+(PO4)(OH)
Reference: Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Torbernite
Formula: Cu(UO2)2(PO4)2 · 12H2O
Reference: Rocks & Minerals: 80: 252.
Triphylite
Formula: LiFe2+PO4
Reference: Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index; USGS Prof Paper 255
Triplite ?
Formula: (Mn2+,Fe2+)2(PO4)(F,OH)
Description: No data. Unlikely for both an iron-rich and manganese-rich primary phosphate to be present.
Reference: Nashua Mineralogical Society Display Cat., 1995.
Vivianite
Formula: Fe2+3(PO4)2 · 8H2O
Reference: Rocks & Minerals (2005) 80:242-261 New Hampshire Mineral Locality Index
Wolfeite ?
Formula: (Fe2+,Mn2+)2(PO4)(OH)
Description: No data.
Reference: No reference listed
Xanthoxenite
Formula: Ca4Fe3+2(PO4)4(OH)2 · 3H2O
Reference: Rocks & Minerals: 80: 252.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Arsenopyrite'2.EB.20FeAsS
Group 4 - Oxides and Hydroxides
'Quartz'4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Group 8 - Phosphates, Arsenates and Vanadates
'Autunite'8.EB.05Ca(UO2)2(PO4)2 · 11H2O
'Beraunite'8.DC.27Fe2+Fe3+5(PO4)4(OH)5 · 6H2O
'Bermanite'8.DC.20Mn2+Mn3+2(PO4)2(OH)2 · 4H2O
'Brazilianite'8.BK.05NaAl3(PO4)2(OH)4
'Childrenite' ?8.DD.20Fe2+Al(PO4)(OH)2 · H2O
'Dufrénite' ?8.DK.15Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
'Eosphorite'8.DD.20Mn2+Al(PO4)(OH)2 · H2O
'Frondelite'8.BC.10Mn2+Fe3+4(PO4)3(OH)5
'Graftonite'8.AB.20Fe2+Fe2+2(PO4)2
'Herderite' ?8.BA.10CaBePO4(F,OH)
'Heterosite'8.AB.10(Fe3+,Mn3+)PO4
'Hureaulite'8.CB.10(Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
'Hydroxylherderite'8.BA.10CaBe(PO4)(OH,F)
'Jahnsite-(CaMnFe)' (TL)8.DH.15{Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O
'Jahnsite-(CaMnMg)'8.DH.15{Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O
'Laueite'8.DC.30Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
'Leucophosphite'8.DH.10KFe3+2(PO4)2(OH) · 2H2O
'Ludlamite'8.CD.20Fe2+3(PO4)2 · 4H2O
'Meta-autunite'8.EB.10Ca(UO2)2(PO4)2 · 6-8H2O
'Metatorbernite'8.EB.10Cu(UO2)2(PO4)2 · 8H2O
'Paravauxite'8.DC.30Fe2+Al2(PO4)2(OH)2 · 8H2O
'Phosphosiderite'8.CD.05FePO4 · 2H2O
'Purpurite' ?8.AB.10(Mn3+,Fe3+)PO4
'Rockbridgeite'8.BC.10Fe2+Fe3+4(PO4)3(OH)5
Stewartite8.DC.30Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
Strengite8.CD.10FePO4 · 2H2O
Strunzite8.DC.25Mn2+Fe3+2(PO4)2(OH)2 · 6H2O
Tavorite8.BB.05LiFe3+(PO4)(OH)
Torbernite8.EB.05Cu(UO2)2(PO4)2 · 12H2O
Triphylite8.AB.10LiFe2+PO4
Triplite ?8.BB.10(Mn2+,Fe2+)2(PO4)(F,OH)
Vivianite8.CE.40Fe2+3(PO4)2 · 8H2O
Wolfeite ?8.BB.15(Fe2+,Mn2+)2(PO4)(OH)
Xanthoxenite8.DH.40Ca4Fe3+2(PO4)4(OH)2 · 3H2O
Group 9 - Silicates
'Albite'9.FA.35Na(AlSi3O8)
'Almandine'9.AD.25Fe2+3Al2(SiO4)3
'Bertrandite'9.BD.05Be4(Si2O7)(OH)2
'Beryl'9.CJ.05Be3Al2(Si6O18)
'Microcline'9.FA.30K(AlSi3O8)
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
'Sillimanite'9.AF.05Al2(SiO4)O
Unclassified Minerals, Rocks, etc.
'Biotite'-
'Eleonorite'-Fe3+6(PO4)4O(OH)4 · 6H2O

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:2
Arsenopyrite2.12.4.1FeAsS
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
ABXO4
Triphylite38.1.1.1LiFe2+PO4
(AB)3(XO4)2
Graftonite38.3.3.1Fe2+Fe2+2(PO4)2
AXO4
Heterosite38.4.1.1(Fe3+,Mn3+)PO4
Purpurite ?38.4.1.2(Mn3+,Fe3+)PO4
Group 39 - HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
(AB)5[HXO4]2[XO4]2.xH2O
Hureaulite39.2.1.1(Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
Group 40 - HYDRATED NORMAL PHOSPHATES,ARSENATES AND VANADATES
AB2(XO4)2·xH2O, containing (UO2)2+
Autunite40.2a.1.1Ca(UO2)2(PO4)2 · 11H2O
Meta-autunite40.2a.1.2Ca(UO2)2(PO4)2 · 6-8H2O
Metatorbernite40.2a.13.2Cu(UO2)2(PO4)2 · 8H2O
Torbernite40.2a.13.1Cu(UO2)2(PO4)2 · 12H2O
A3(XO4)2·xH2O
Ludlamite40.3.5.1Fe2+3(PO4)2 · 4H2O
Vivianite40.3.6.1Fe2+3(PO4)2 · 8H2O
(AB)5(XO4)2·xH2O
Phosphosiderite40.4.3.2FePO4 · 2H2O
Strengite40.4.1.2FePO4 · 2H2O
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq
Brazilianite41.5.7.1NaAl3(PO4)2(OH)4
Herderite ?41.5.4.1CaBePO4(F,OH)
Hydroxylherderite41.5.4.2CaBe(PO4)(OH,F)
Tavorite41.5.9.1LiFe3+(PO4)(OH)
A2(XO4)Zq
Triplite ?41.6.1.2(Mn2+,Fe2+)2(PO4)(F,OH)
Wolfeite ?41.6.3.1(Fe2+,Mn2+)2(PO4)(OH)
(AB)5(XO4)3Zq
Frondelite41.9.2.2Mn2+Fe3+4(PO4)3(OH)5
Rockbridgeite41.9.2.1Fe2+Fe3+4(PO4)3(OH)5
Group 42 - HYDRATED PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
(AB)2(XO4)Zq·xH2O
Childrenite ?42.7.1.1Fe2+Al(PO4)(OH)2 · H2O
Eosphorite42.7.1.2Mn2+Al(PO4)(OH)2 · H2O
(AB)7(XO4)4Zq·xH2O
Dufrénite ?42.9.1.2Ca0.5Fe2+Fe3+5(PO4)4(OH)6 · 2H2O
(AB)3(XO4)2Zq·xH2O
Beraunite42.11.16.1Fe2+Fe3+5(PO4)4(OH)5 · 6H2O
Bermanite42.11.17.1Mn2+Mn3+2(PO4)2(OH)2 · 4H2O
Jahnsite-(CaMnFe) (TL)42.11.2.2{Ca}{Mn2+}{Fe2+2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Jahnsite-(CaMnMg)42.11.2.1{Ca}{Mn2+}{(Mg,Fe2+)2}{Fe3+2}(PO4)4(OH)2 · 8H2O
Laueite42.11.10.1Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
Leucophosphite42.11.6.1KFe3+2(PO4)2(OH) · 2H2O
Paravauxite42.11.14.2Fe2+Al2(PO4)2(OH)2 · 8H2O
Stewartite42.11.10.2Mn2+Fe3+2(PO4)2(OH)2 · 8H2O
Strunzite42.11.9.1Mn2+Fe3+2(PO4)2(OH)2 · 6H2O
Xanthoxenite42.11.15.1Ca4Fe3+2(PO4)4(OH)2 · 3H2O
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [4] and >[4] coordination
Sillimanite52.2.2a.1Al2(SiO4)O
Group 56 - SOROSILICATES Si2O7 Groups, With Additional O, OH, F and H2O
Si2O7 Groups and O, OH, F, and H2O with cations in [4] coordination
Bertrandite56.1.1.1Be4(Si2O7)(OH)2
Group 61 - CYCLOSILICATES Six-Membered Rings
Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
Beryl61.1.1.1Be3Al2(Si6O18)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
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
Albite76.1.3.1Na(AlSi3O8)
Microcline76.1.1.5K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
'Biotite'-
Eleonorite-Fe3+6(PO4)4O(OH)4 · 6H2O
Quartz
var: Smoky Quartz
-SiO2

List of minerals for each chemical element

HHydrogen
H AutuniteCa(UO2)2(PO4)2 · 11H2O
H BerauniteFe2+Fe53+(PO4)4(OH)5 · 6H2O
H BermaniteMn2+Mn23+(PO4)2(OH)2 · 4H2O
H BertranditeBe4(Si2O7)(OH)2
H BrazilianiteNaAl3(PO4)2(OH)4
H ChildreniteFe2+Al(PO4)(OH)2 · H2O
H DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
H EleonoriteFe63+(PO4)4O(OH)4 · 6H2O
H EosphoriteMn2+Al(PO4)(OH)2 · H2O
H FrondeliteMn2+Fe43+(PO4)3(OH)5
H Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
H HydroxylherderiteCaBe(PO4)(OH,F)
H Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
H Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
H LaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
H LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
H LudlamiteFe32+(PO4)2 · 4H2O
H Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
H MetatorberniteCu(UO2)2(PO4)2 · 8H2O
H MuscoviteKAl2(AlSi3O10)(OH)2
H ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
H PhosphosideriteFePO4 · 2H2O
H RockbridgeiteFe2+Fe43+(PO4)3(OH)5
H StewartiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
H StrengiteFePO4 · 2H2O
H StrunziteMn2+Fe23+(PO4)2(OH)2 · 6H2O
H TavoriteLiFe3+(PO4)(OH)
H TorberniteCu(UO2)2(PO4)2 · 12H2O
H Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
H VivianiteFe32+(PO4)2 · 8H2O
H Wolfeite(Fe2+,Mn2+)2(PO4)(OH)
H XanthoxeniteCa4Fe23+(PO4)4(OH)2 · 3H2O
LiLithium
Li TavoriteLiFe3+(PO4)(OH)
Li TriphyliteLiFe2+PO4
BeBeryllium
Be BertranditeBe4(Si2O7)(OH)2
Be BerylBe3Al2(Si6O18)
Be HerderiteCaBePO4(F,OH)
Be HydroxylherderiteCaBe(PO4)(OH,F)
OOxygen
O AlbiteNa(AlSi3O8)
O AlmandineFe32+Al2(SiO4)3
O AutuniteCa(UO2)2(PO4)2 · 11H2O
O BerauniteFe2+Fe53+(PO4)4(OH)5 · 6H2O
O BermaniteMn2+Mn23+(PO4)2(OH)2 · 4H2O
O BertranditeBe4(Si2O7)(OH)2
O BerylBe3Al2(Si6O18)
O BrazilianiteNaAl3(PO4)2(OH)4
O ChildreniteFe2+Al(PO4)(OH)2 · H2O
O DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
O EleonoriteFe63+(PO4)4O(OH)4 · 6H2O
O EosphoriteMn2+Al(PO4)(OH)2 · H2O
O FrondeliteMn2+Fe43+(PO4)3(OH)5
O GraftoniteFe2+Fe22+(PO4)2
O HerderiteCaBePO4(F,OH)
O Heterosite(Fe3+,Mn3+)PO4
O Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
O HydroxylherderiteCaBe(PO4)(OH,F)
O Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
O Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
O LaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
O LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
O LudlamiteFe32+(PO4)2 · 4H2O
O Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
O MetatorberniteCu(UO2)2(PO4)2 · 8H2O
O MicroclineK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
O PhosphosideriteFePO4 · 2H2O
O Purpurite(Mn3+,Fe3+)PO4
O QuartzSiO2
O RockbridgeiteFe2+Fe43+(PO4)3(OH)5
O SillimaniteAl2(SiO4)O
O Quartz (var: Smoky Quartz)SiO2
O StewartiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
O StrengiteFePO4 · 2H2O
O StrunziteMn2+Fe23+(PO4)2(OH)2 · 6H2O
O TavoriteLiFe3+(PO4)(OH)
O TorberniteCu(UO2)2(PO4)2 · 12H2O
O TriphyliteLiFe2+PO4
O Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
O VivianiteFe32+(PO4)2 · 8H2O
O Wolfeite(Fe2+,Mn2+)2(PO4)(OH)
O XanthoxeniteCa4Fe23+(PO4)4(OH)2 · 3H2O
FFluorine
F HerderiteCaBePO4(F,OH)
F Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
NaSodium
Na AlbiteNa(AlSi3O8)
Na BrazilianiteNaAl3(PO4)2(OH)4
MgMagnesium
Mg Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
AlAluminium
Al AlbiteNa(AlSi3O8)
Al AlmandineFe32+Al2(SiO4)3
Al BerylBe3Al2(Si6O18)
Al BrazilianiteNaAl3(PO4)2(OH)4
Al ChildreniteFe2+Al(PO4)(OH)2 · H2O
Al EosphoriteMn2+Al(PO4)(OH)2 · H2O
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
Al SillimaniteAl2(SiO4)O
SiSilicon
Si AlbiteNa(AlSi3O8)
Si AlmandineFe32+Al2(SiO4)3
Si BertranditeBe4(Si2O7)(OH)2
Si BerylBe3Al2(Si6O18)
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si QuartzSiO2
Si SillimaniteAl2(SiO4)O
Si Quartz (var: Smoky Quartz)SiO2
PPhosphorus
P AutuniteCa(UO2)2(PO4)2 · 11H2O
P BerauniteFe2+Fe53+(PO4)4(OH)5 · 6H2O
P BermaniteMn2+Mn23+(PO4)2(OH)2 · 4H2O
P BrazilianiteNaAl3(PO4)2(OH)4
P ChildreniteFe2+Al(PO4)(OH)2 · H2O
P DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
P EleonoriteFe63+(PO4)4O(OH)4 · 6H2O
P EosphoriteMn2+Al(PO4)(OH)2 · H2O
P FrondeliteMn2+Fe43+(PO4)3(OH)5
P GraftoniteFe2+Fe22+(PO4)2
P HerderiteCaBePO4(F,OH)
P Heterosite(Fe3+,Mn3+)PO4
P Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
P HydroxylherderiteCaBe(PO4)(OH,F)
P Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
P Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
P LaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
P LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
P LudlamiteFe32+(PO4)2 · 4H2O
P Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
P MetatorberniteCu(UO2)2(PO4)2 · 8H2O
P ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
P PhosphosideriteFePO4 · 2H2O
P Purpurite(Mn3+,Fe3+)PO4
P RockbridgeiteFe2+Fe43+(PO4)3(OH)5
P StewartiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
P StrengiteFePO4 · 2H2O
P StrunziteMn2+Fe23+(PO4)2(OH)2 · 6H2O
P TavoriteLiFe3+(PO4)(OH)
P TorberniteCu(UO2)2(PO4)2 · 12H2O
P TriphyliteLiFe2+PO4
P Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
P VivianiteFe32+(PO4)2 · 8H2O
P Wolfeite(Fe2+,Mn2+)2(PO4)(OH)
P XanthoxeniteCa4Fe23+(PO4)4(OH)2 · 3H2O
SSulfur
S ArsenopyriteFeAsS
KPotassium
K LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca AutuniteCa(UO2)2(PO4)2 · 11H2O
Ca DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
Ca HerderiteCaBePO4(F,OH)
Ca HydroxylherderiteCaBe(PO4)(OH,F)
Ca Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
Ca Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
Ca Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
Ca XanthoxeniteCa4Fe23+(PO4)4(OH)2 · 3H2O
MnManganese
Mn BermaniteMn2+Mn23+(PO4)2(OH)2 · 4H2O
Mn EosphoriteMn2+Al(PO4)(OH)2 · H2O
Mn FrondeliteMn2+Fe43+(PO4)3(OH)5
Mn Heterosite(Fe3+,Mn3+)PO4
Mn Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
Mn Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
Mn Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
Mn LaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
Mn Purpurite(Mn3+,Fe3+)PO4
Mn StewartiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
Mn StrunziteMn2+Fe23+(PO4)2(OH)2 · 6H2O
Mn Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
FeIron
Fe AlmandineFe32+Al2(SiO4)3
Fe ArsenopyriteFeAsS
Fe BerauniteFe2+Fe53+(PO4)4(OH)5 · 6H2O
Fe ChildreniteFe2+Al(PO4)(OH)2 · H2O
Fe DufréniteCa0.5Fe2+Fe53+(PO4)4(OH)6 · 2H2O
Fe EleonoriteFe63+(PO4)4O(OH)4 · 6H2O
Fe FrondeliteMn2+Fe43+(PO4)3(OH)5
Fe GraftoniteFe2+Fe22+(PO4)2
Fe Heterosite(Fe3+,Mn3+)PO4
Fe Jahnsite-(CaMnFe){Ca}{Mn2+}{Fe22+}{Fe23+}(PO4)4(OH)2 · 8H2O
Fe Jahnsite-(CaMnMg){Ca}{Mn2+}{(Mg,Fe2+)2}{Fe23+}(PO4)4(OH)2 · 8H2O
Fe LaueiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
Fe LeucophosphiteKFe23+(PO4)2(OH) · 2H2O
Fe LudlamiteFe32+(PO4)2 · 4H2O
Fe ParavauxiteFe2+Al2(PO4)2(OH)2 · 8H2O
Fe PhosphosideriteFePO4 · 2H2O
Fe Purpurite(Mn3+,Fe3+)PO4
Fe RockbridgeiteFe2+Fe43+(PO4)3(OH)5
Fe StewartiteMn2+Fe23+(PO4)2(OH)2 · 8H2O
Fe StrengiteFePO4 · 2H2O
Fe StrunziteMn2+Fe23+(PO4)2(OH)2 · 6H2O
Fe TavoriteLiFe3+(PO4)(OH)
Fe TriphyliteLiFe2+PO4
Fe Triplite(Mn2+,Fe2+)2(PO4)(F,OH)
Fe VivianiteFe32+(PO4)2 · 8H2O
Fe Wolfeite(Fe2+,Mn2+)2(PO4)(OH)
Fe XanthoxeniteCa4Fe23+(PO4)4(OH)2 · 3H2O
CuCopper
Cu MetatorberniteCu(UO2)2(PO4)2 · 8H2O
Cu TorberniteCu(UO2)2(PO4)2 · 12H2O
AsArsenic
As ArsenopyriteFeAsS
UUranium
U AutuniteCa(UO2)2(PO4)2 · 11H2O
U Meta-autuniteCa(UO2)2(PO4)2 · 6-8H2O
U MetatorberniteCu(UO2)2(PO4)2 · 8H2O
U TorberniteCu(UO2)2(PO4)2 · 12H2O

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

Devonian - Silurian
358.9 - 443.8 Ma



ID: 3184704
Paleozoic intrusive rocks

Age: Paleozoic (358.9 - 443.8 Ma)

Lithology: Intrusive igneous 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]

Early Devonian
393.3 - 419.2 Ma



ID: 2756282
Littleton Formation, Upper unnamed member

Age: Early Devonian (393.3 - 419.2 Ma)

Stratigraphic Name: Littleton Formation

Description: Light-gray metaturbidite, lithologically identical to, and probably correlative with, the Seboomook Formation of Maine. Coticule layers common.

Comments: Part of the Central Maine Composite Terrane (Central Maine Trough) - Variably metamorphosed sedimentary and volcanic rocks of greenschist to granulite facies, locally migmatized. Area includes structural belts between the Monroe fault on the west and the Campbell Hill fault on the east; that is, the Bronson Hill anticlinorium, Piedmont allochthon, Kearsarge-central Maine synclinorium, central New Hampshire anticlinorium, and Rochester-Lebanon (Maine) antiformal synclinorium.

Lithology: Major:{metaclastic}

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]

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)
McNair, A. H.; Burnett, C. B.; Headley, J. B., Jr. (1943). Fletcher mica mine, Groton, New Hampshire, USGS Open-File Report 43-63.
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: 868.
Cameron, E.N., Larrabee, D.M., McNair, A.H., et al (1954), USGS Professional Paper 255.
Meyers & Stewart (1956), Geology of New Hampshire, part III.
Moore and Ito (1978), Mineralogical Magazine: 42: 309-323.
Nashua Mineralogical Society Display Catalog (1995).
Korbel & Novak (1999), Min. Encylopaedia: 163.
Rocks & Minerals (2005), New Hampshire Mineral Locality Index: 80: 242-261.
USGS (2005), Mineral Resources Data System (MRDS): U.S. Geological Survey, Reston, Virginia, loc. file ID #10223198.
U.S. Bureau of Mines, Minerals Availability System (MAS) file ID #0330090080.

External Links



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