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Comolli Granite Quarry, Milford, Hillsborough Co., New Hampshire, USA

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Latitude & Longitude (WGS84): 42° 46' 57'' North , 71° 42' 32'' West
Latitude & Longitude (decimal): 42.78271,-71.70901
GeoHash:G#: drt52hr56
Locality type:Quarry
Köppen climate type:Dfb : Warm-summer humid continental climate


The Comolli quarry was located 3 1/2 miles southwest of Milford village, at the east foot of Badger Hill, S. 10° W. of Burns Hill. Opened in 1905 by Comolli Brothers & Co.

Granite was a quartz monzonite of light, inclining to medium, bluish gray
color, and of very fine, even- grained texture, with feldspars and mica up to 0.1 inch.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Commodity List

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


Mineral List


10 valid minerals. 1 erroneous literature entry.

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!

Select Rock List Type

Alphabetical List Tree Diagram

Detailed Mineral List:

Albite
Formula: Na(AlSi3O8)
Reference: Dale, T.N. (1908) The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island. United States Geological Survey, Bulletin 354, 228 pages.
Albite var: Oligoclase
Formula: (Na,Ca)[Al(Si,Al)Si2O8]
Reference: Dale, T.N. (1908) The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island. United States Geological Survey, Bulletin 354, 228 pages.
Annite
Formula: KFe2+3(AlSi3O10)(OH)2
Reference: Van King
'Biotite'
Reference: Dale, T.N. (1908) The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island. United States Geological Survey, Bulletin 354, 228 pages.
Chamosite
Formula: (Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Reference: Van King
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'
Reference: Dale, T.N. (1908) The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island. United States Geological Survey, Bulletin 354, 228 pages.
'commodity:Granite'
Reference: From USGS MRDS database
Kaolinite
Formula: Al2(Si2O5)(OH)4
Reference: Dale, T.N. (1908) The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island. United States Geological Survey, Bulletin 354, 228 pages.
Magnetite
Formula: Fe2+Fe3+2O4
Reference: Morrill, P. (1960) New Hampshire Mines and Mineral Localities, 2nd edition. Dartmouth College Museum, Hanover, New Hampshire, 46 pages.
Microcline
Formula: K(AlSi3O8)
Reference: Dale, T.N. (1908) The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island. United States Geological Survey, Bulletin 354, 228 pages.
Orthoclase
Formula: K(AlSi3O8)
Reference: Dale, T.N. (1908) The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island. United States Geological Survey, Bulletin 354, 228 pages.
Quartz
Formula: SiO2
Reference: Dale, T.N. (1908) The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island. United States Geological Survey, Bulletin 354, 228 pages.
Quartz var: Rutilated 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: Dale, T.N. (1908) The Chief Commercial Granites of Massachusetts, New Hampshire and Rhode Island. United States Geological Survey, Bulletin 354, 228 pages.
Zircon
Formula: Zr(SiO4)
Reference: Morrill, P. (1960) New Hampshire Mines and Mineral Localities, 2nd edition. Dartmouth College Museum, Hanover, New Hampshire, 46 pages.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
'Magnetite'4.BB.05Fe2+Fe3+2O4
Quartz4.DA.05SiO2
var: Rutilated Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
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]
'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)
Orthoclase ?9.FA.30K(AlSi3O8)
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Biotite'-
'Granite'-

List of minerals arranged by Dana 8th Edition classification

Group 4 - SIMPLE OXIDES
AX2
Rutile4.4.1.1TiO2
Group 7 - MULTIPLE OXIDES
AB2X4
Magnetite7.2.2.3Fe2+Fe3+2O4
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 71 - PHYLLOSILICATES Sheets of Six-Membered Rings
Sheets of 6-membered rings with 2:1 layers
Annite71.2.2b.3KFe2+3(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)
Orthoclase ?76.1.1.1K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
Albite
var: Oligoclase
-(Na,Ca)[Al(Si,Al)Si2O8]
'Biotite'-
'Granite'-
Kaolinite-Al2(Si2O5)(OH)4
Quartz
var: Rutilated Quartz
-SiO2

List of minerals for each chemical element

HHydrogen
H AnniteKFe32+(AlSi3O10)(OH)2
H Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
H KaoliniteAl2(Si2O5)(OH)4
OOxygen
O AlbiteNa(AlSi3O8)
O AnniteKFe32+(AlSi3O10)(OH)2
O Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
O FluorapatiteCa5(PO4)3F
O KaoliniteAl2(Si2O5)(OH)4
O MagnetiteFe2+Fe23+O4
O MicroclineK(AlSi3O8)
O Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
O OrthoclaseK(AlSi3O8)
O QuartzSiO2
O Quartz (var: Rutilated Quartz)SiO2
O RutileTiO2
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 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 Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Al OrthoclaseK(AlSi3O8)
SiSilicon
Si AlbiteNa(AlSi3O8)
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 Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
Si OrthoclaseK(AlSi3O8)
Si QuartzSiO2
Si Quartz (var: Rutilated Quartz)SiO2
Si ZirconZr(SiO4)
PPhosphorus
P FluorapatiteCa5(PO4)3F
KPotassium
K AnniteKFe32+(AlSi3O10)(OH)2
K MicroclineK(AlSi3O8)
K OrthoclaseK(AlSi3O8)
CaCalcium
Ca FluorapatiteCa5(PO4)3F
Ca Albite (var: Oligoclase)(Na,Ca)[Al(Si,Al)Si2O8]
TiTitanium
Ti RutileTiO2
FeIron
Fe AnniteKFe32+(AlSi3O10)(OH)2
Fe Chamosite(Fe2+,Mg,Al,Fe3+)6(Si,Al)4O10(OH,O)8
Fe MagnetiteFe2+Fe23+O4
ZrZirconium
Zr ZirconZr(SiO4)

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

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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.


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