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Milford, Hillsborough Co., New Hampshire, USA

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Latitude & Longitude (WGS84): 42° 50' 7'' North , 71° 38' 56'' West
Latitude & Longitude (decimal): 42.83528,-71.64889
GeoHash:G#: drt59tfve
Köppen climate type:Dfb : Warm-summer humid continental climate


Milford is a town with a history of at least 15 granite quarries. Many of these were serviced by the Boston & Maine Railroad.

According to T. Nelson Dale (1908) Milford granites are quartz monzonites a of light, medium, and dark-gray shade, in places of a slight bluish, pinkish, or buff tinge, and always spangled with black mica.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

This is a list of exploitable or exploited mineral commodities recorded from this region.


Mineral List

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

16 valid minerals.

Rock Types Recorded

Note: this is a very new system on mindat.org and 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:

Albite
Formula: Na(AlSi3O8)
Localities: Reported from at least 7 localities in this region.
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Localities: Reported from at least 7 localities in this region.
Allanite-(Ce)
Formula: {CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Reference: Morrill, P. (1960) New Hampshire Mines and Mineral Localities, 2nd edition. Dartmouth College Museum, Hanover, New Hampshire, 46 pages.
'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Localities: Reported from at least 7 localities in this region.
Annite
Formula: KFe2+3(AlSi3O10)(OH)2
'Apatite'
'Biotite'
Reference: Morrill, P. (1960) New Hampshire Mines and Mineral Localities, 2nd edition. Dartmouth College Museum, Hanover, New Hampshire, 46 pages.
Calcite
Formula: CaCO3
Chalcopyrite
Formula: CuFeS2
Chamosite
Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
'Chlorite Group'
'Feldspar Group'
Fluorapatite
Formula: Ca5(PO4)3F
Reference: Morrill, P. (1960) New Hampshire Mines and Mineral Localities, 2nd edition. Dartmouth College Museum, Hanover, New Hampshire, 46 pages.
'Granite'
Localities: Reported from at least 14 localities in this region.
'Granite'
Localities: Reported from at least 14 localities in this region.
'commodity:Granite'
Hematite
Formula: Fe2O3
Kaolinite
Formula: Al2(Si2O5)(OH)4
Localities: Reported from at least 7 localities in this region.
'Limonite'
Formula: (Fe,O,OH,H2O)
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Nicolay, H.H., Stone, A.V. (1967) Rocks and Minerals: A Guide for Collectors of the Eastern United States, 255 pages.
'Manganese Oxides'
Reference: P Cristofono collection, 2007
'Manganese Oxides var: Manganese Dendrites'
Reference: P Cristofono collection, 2007
Microcline
Formula: K(AlSi3O8)
Reference: Nicolay, H.H., Stone, A.V. (1967) Rocks and Minerals: A Guide for Collectors of the Eastern United States, 255 pages.
'Monzonite'
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
'Oligoclase-Andesine'
Pyrite
Formula: FeS2
Reference: Nicolay, H.H., Stone, A.V. (1967) Rocks and Minerals: A Guide for Collectors of the Eastern United States, 255 pages.
Quartz
Formula: SiO2
Reference: Morrill, P. (1960) New Hampshire Mines and Mineral Localities, 2nd edition. Dartmouth College Museum, Hanover, New Hampshire, 46 pages.
Quartz var: Rock Crystal
Formula: SiO2
Quartz var: Rutilated Quartz
Formula: SiO2
Reference: Nicolay, H.H., Stone, A.V. (1967) Rocks and Minerals: A Guide for Collectors of the Eastern United States, 255 pages.
Quartz var: Smoky Quartz
Formula: SiO2
Reference: Morrill, P. (1960) New Hampshire Mines and Mineral Localities, 2nd edition. Dartmouth College Museum, Hanover, New Hampshire, 46 pages.
Rutile
Formula: TiO2
Reference: Morrill, P. (1960) New Hampshire Mines and Mineral Localities, 2nd edition. Dartmouth College Museum, Hanover, New Hampshire, 46 pages.
Zircon
Formula: Zr(SiO4)
Reference: Nicolay, H.H., Stone, A.V. (1967) Rocks and Minerals: A Guide for Collectors of the Eastern United States, 255 pages.

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Chalcopyrite'2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
'Hematite'4.CB.05Fe2O3
'Magnetite'4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
var: Rock Crystal4.DA.05SiO2
var: Rutilated Quartz4.DA.05SiO2
var: Smoky Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Group 5 - Nitrates and Carbonates
'Calcite'5.AB.05CaCO3
Group 8 - Phosphates, Arsenates and Vanadates
'Fluorapatite'8.BN.05Ca5(PO4)3F
Group 9 - Silicates
'Albite'9.FA.35Na(AlSi3O8)
var: Oligoclase9.FA.35(Na,Ca)[Al(Si,Al)Si2O8]
'Allanite-(Ce)'9.BG.05b{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
'Annite'9.EC.20KFe2+3(AlSi3O10)(OH)2
'Chamosite'9.EC.55(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
'Kaolinite'9.ED.05Al2(Si2O5)(OH)4
'Microcline'9.FA.30K(AlSi3O8)
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Apatite'-
'Biotite'-
'Chlorite Group'-
'Feldspar Group'-
'Granite'-
'Limonite'-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-
'Monzonite'-
Oligoclase-Andesine-

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmBnXp, with (m+n):p = 1:1
Chalcopyrite2.9.1.1CuFeS2
AmBnXp, with (m+n):p = 1:2
Pyrite2.12.1.1FeS2
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
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)
Allanite-(Ce)58.2.1a.1{CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Group 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Annite71.2.2b.3KFe2+3(AlSi3O10)(OH)2
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Chamosite71.4.1.7(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
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.
Albite
var: Oligoclase
-(Na,Ca)[Al(Si,Al)Si2O8]
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Apatite'-
'Biotite'-
'Chlorite Group'-
'Feldspar Group'-
'Granite'-
Kaolinite-Al2(Si2O5)(OH)4
'Limonite'-(Fe,O,OH,H2O)
'Manganese Oxides'-
'var: Manganese Dendrites'-
'Monzonite'-
'Oligoclase-Andesine'-
Quartz
var: Rock Crystal
-SiO2
var: Rutilated Quartz-SiO2
var: Smoky Quartz-SiO2

List of minerals for each chemical element

HHydrogen
H Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
H Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
H AnniteKFe32+(AlSi3O10)(OH)2
H Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
H KaoliniteAl2(Si2O5)(OH)4
H Limonite(Fe,O,OH,H2O)
H MuscoviteKAl2(AlSi3O10)(OH)2
CCarbon
C CalciteCaCO3
OOxygen
O AlbiteNa(AlSi3O8)
O Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
O Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
O AnniteKFe32+(AlSi3O10)(OH)2
O CalciteCaCO3
O Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
O FluorapatiteCa5(PO4)3F
O HematiteFe2O3
O KaoliniteAl2(Si2O5)(OH)4
O Limonite(Fe,O,OH,H2O)
O MagnetiteFe2+Fe23+O4
O MicroclineK(AlSi3O8)
O MuscoviteKAl2(AlSi3O10)(OH)2
O Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
O QuartzSiO2
O Quartz (var: Rock Crystal)SiO2
O Quartz (var: Rutilated Quartz)SiO2
O RutileTiO2
O Quartz (var: Smoky Quartz)SiO2
O ZirconZr(SiO4)
FFluorine
F FluorapatiteCa5(PO4)3F
NaSodium
Na AlbiteNa(AlSi3O8)
Na Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
MgMagnesium
Mg Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
AlAluminium
Al AlbiteNa(AlSi3O8)
Al Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Al AnniteKFe32+(AlSi3O10)(OH)2
Al Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Al KaoliniteAl2(Si2O5)(OH)4
Al MicroclineK(AlSi3O8)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
SiSilicon
Si AlbiteNa(AlSi3O8)
Si Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Si Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
Si AnniteKFe32+(AlSi3O10)(OH)2
Si Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Si KaoliniteAl2(Si2O5)(OH)4
Si MicroclineK(AlSi3O8)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Si QuartzSiO2
Si Quartz (var: Rock Crystal)SiO2
Si Quartz (var: Rutilated Quartz)SiO2
Si Quartz (var: Smoky Quartz)SiO2
Si ZirconZr(SiO4)
PPhosphorus
P FluorapatiteCa5(PO4)3F
SSulfur
S ChalcopyriteCuFeS2
S PyriteFeS2
KPotassium
K AnniteKFe32+(AlSi3O10)(OH)2
K MicroclineK(AlSi3O8)
K MuscoviteKAl2(AlSi3O10)(OH)2
CaCalcium
Ca Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Ca CalciteCaCO3
Ca FluorapatiteCa5(PO4)3F
Ca Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
TiTitanium
Ti RutileTiO2
FeIron
Fe Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)
Fe AnniteKFe32+(AlSi3O10)(OH)2
Fe ChalcopyriteCuFeS2
Fe Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Fe HematiteFe2O3
Fe Limonite(Fe,O,OH,H2O)
Fe MagnetiteFe2+Fe23+O4
Fe PyriteFeS2
CuCopper
Cu ChalcopyriteCuFeS2
ZrZirconium
Zr ZirconZr(SiO4)
CeCerium
Ce Allanite-(Ce){CaCe}{Al2Fe2+}(Si2O7)(SiO4)O(OH)

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

Permian
251.902 - 298.9 Ma



ID: 2760906
Gray biotite granite

Age: Phanerozoic (251.902 - 298.9 Ma)

Description: Contains minor muscovite. Found in Milford quadrangle.

Comments: Granite, Milford quadrangle = 280+/-5 U/Pb, monazite, 275+/-? (approx) U/Pb, zircon per NH038. Original map source: Bennett, D.S., Wittkop, C.A., and Dicken, C.L., 2006, Bedrock Geologic Map of New Hampshire - A Digital Representation of the Lyons and others 1997 map and ancillary files: U.S. Geological Survey Data Series 215, CD-ROM, scale 1:250,000.

Lithology: Major:{granite}

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]

Devonian - Silurian
358.9 - 443.8 Ma



ID: 3185307
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]

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)
Dale, T.N. (1908) The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island. United States Geological Survey, Bulletin 354, 228 pages.
Brayley. A.W. (1913) History of the Granite Industry of New England. Vol II, The National Association of Granite Industries of the United States.
Morrill, P. (1960) New Hampshire Mines and Mineral Localities, 2nd edition. Dartmouth College Museum, Hanover, New Hampshire, 46 pages.
Nicolay, H.H., Stone, A.V. (1967) Rocks and Minerals: A Guide for Collectors of the Eastern United States, 255 pages.

Localities in this Region
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