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Dalton, Berkshire Co., Massachusetts, USA

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Latitude & Longitude (WGS84): 42° 28' 25'' North , 73° 10' 0'' West
Latitude & Longitude (decimal): 42.47361,-73.16667
GeoHash:G#: drecxh1dt
Köppen climate type:Dfb : Warm-summer humid continental climate


The town of Dalton was officially incorporated in 1784.

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

13 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:

'Allanite Group'
Formula: {A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Anthophyllite
Formula: ☐{Mg2}{Mg5}(Si8O22)(OH)2
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
'Biotite'
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Calcite
Formula: CaCO3
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
'Chert'
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
'Chlorite Group'
Clinochlore
Formula: Mg5Al(AlSi3O10)(OH)8
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Hematite
Formula: Fe2O3
Ilmenite
Formula: Fe2+TiO3
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
'Manganese Oxides'
Reference: Daniel Clark collection
'Manganese Oxides var: Manganese Dendrites'
Reference: Daniel Clark collection
Muscovite
Formula: KAl2(AlSi3O10)(OH)2
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Orthoclase
Formula: K(AlSi3O8)
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Pyrrhotite
Formula: Fe7S8
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Quartz
Formula: SiO2
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Quartz var: Agate
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Quartz var: Chalcedony
Formula: SiO2
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Quartz var: Jasper
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Schorl
Formula: Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Talc
Formula: Mg3Si4O10(OH)2
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Talc var: Steatite
Formula: Mg3(Si4O10)(OH)2
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Reference: Gleba, 1978. Mass. Mineral & Fossil Localities

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
'Pyrrhotite'2.CC.10Fe7S8
Group 4 - Oxides and Hydroxides
Hematite4.CB.05Fe2O3
Ilmenite4.CB.05Fe2+TiO3
'Quartz'4.DA.05SiO2
var: Agate4.DA.05SiO2
var: Chalcedony4.DA.05SiO2
var: Jasper4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Group 9 - Silicates
Anthophyllite9.DE.05☐{Mg2}{Mg5}(Si8O22)(OH)2
Clinochlore9.EC.55Mg5Al(AlSi3O10)(OH)8
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
'Muscovite'9.EC.15KAl2(AlSi3O10)(OH)2
'Orthoclase'9.FA.30K(AlSi3O8)
'Schorl'9.CK.05Na(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)
Talc9.EC.05Mg3Si4O10(OH)2
var: Steatite9.EC.05Mg3(Si4O10)(OH)2
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Unclassified Minerals, Rocks, etc.
Allanite Group-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
Biotite-
Chert-
Chlorite Group-
'Manganese Oxides'-
'var: Manganese Dendrites'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn

List of minerals arranged by Dana 8th Edition classification

Group 2 - SULFIDES
AmXp, with m:p = 1:1
Pyrrhotite2.8.10.1Fe7S8
Group 4 - SIMPLE OXIDES
A2X3
Hematite4.3.1.2Fe2O3
Ilmenite4.3.5.1Fe2+TiO3
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
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)
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 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 2:1 layers
Muscovite71.2.2a.1KAl2(AlSi3O10)(OH)2
Talc71.2.1.3Mg3Si4O10(OH)2
Sheets of 6-membered rings interlayered 1:1, 2:1, and octahedra
Clinochlore71.4.1.4Mg5Al(AlSi3O10)(OH)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
Orthoclase76.1.1.1K(AlSi3O8)
Unclassified Minerals, Rocks, etc.
'Allanite Group'-{A12+REE3+}{M3+2M32+}(Si2O7)(SiO4)O(OH)
'Biotite'-
'Chert'-
'Chlorite Group'-
'Manganese Oxides'-
'var: Manganese Dendrites'-
Quartz
var: Agate
-SiO2
var: Chalcedony-SiO2
var: Jasper-SiO2
'Serpentine Subgroup'-D3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Talc
var: Steatite
-Mg3(Si4O10)(OH)2

List of minerals for each chemical element

HHydrogen
H Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
H Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
H ClinochloreMg5Al(AlSi3O10)(OH)8
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H MuscoviteKAl2(AlSi3O10)(OH)2
H SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
H Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
H Talc (var: Steatite)Mg3(Si4O10)(OH)2
H TalcMg3Si4O10(OH)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
BBoron
B SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
CCarbon
C CalciteCaCO3
OOxygen
O Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
O Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
O CalciteCaCO3
O Quartz (var: Chalcedony)SiO2
O ClinochloreMg5Al(AlSi3O10)(OH)8
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O HematiteFe2O3
O IlmeniteFe2+TiO3
O MuscoviteKAl2(AlSi3O10)(OH)2
O OrthoclaseK(AlSi3O8)
O QuartzSiO2
O SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
O Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
O Talc (var: Steatite)Mg3(Si4O10)(OH)2
O TalcMg3Si4O10(OH)2
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
NaSodium
Na SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
MgMagnesium
Mg Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Mg ClinochloreMg5Al(AlSi3O10)(OH)8
Mg Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Mg Talc (var: Steatite)Mg3(Si4O10)(OH)2
Mg TalcMg3Si4O10(OH)2
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
AlAluminium
Al ClinochloreMg5Al(AlSi3O10)(OH)8
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al MuscoviteKAl2(AlSi3O10)(OH)2
Al OrthoclaseK(AlSi3O8)
Al SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Al Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
SiSilicon
Si Allanite Group{A12+REE3+}{M23+M32+}(Si2O7)(SiO4)O(OH)
Si Anthophyllite☐{Mg2}{Mg5}(Si8O22)(OH)2
Si Quartz (var: Chalcedony)SiO2
Si ClinochloreMg5Al(AlSi3O10)(OH)8
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si MuscoviteKAl2(AlSi3O10)(OH)2
Si OrthoclaseK(AlSi3O8)
Si QuartzSiO2
Si SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Si Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
Si Talc (var: Steatite)Mg3(Si4O10)(OH)2
Si TalcMg3Si4O10(OH)2
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
SSulfur
S PyrrhotiteFe7S8
KPotassium
K MuscoviteKAl2(AlSi3O10)(OH)2
K OrthoclaseK(AlSi3O8)
CaCalcium
Ca CalciteCaCO3
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
TiTitanium
Ti IlmeniteFe2+TiO3
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe HematiteFe2O3
Fe IlmeniteFe2+TiO3
Fe PyrrhotiteFe7S8
Fe SchorlNa(Fe32+)Al6(Si6O18)(BO3)3(OH)3(OH)
Fe Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D= Mg, Fe, Ni, Mn, Al, Zn

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

Early Cambrian
511 - 541 Ma



ID: 3000410
Stockbridge Formation

Age: Cambrian (511 - 541 Ma)

Stratigraphic Name: Stockbridge Formation

Description: White to light-powdery-blue-gray dolostone with disseminated grains of quartz and prominent sprays of tremolite in higher-grade areas.

Comments: Part of Taconic-Berkshire Zone (Ordovician and Older Rocks)

Lithology: Major:{dolostone}

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]

Mesoproterozoic
1000 - 1600 Ma



ID: 3190409
Mesoproterozoic crystalline metamorphic rocks

Age: Mesoproterozoic (1000 - 1600 Ma)

Lithology: Paragneiss; paragneiss

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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Gleba (1978), Massachusetts Mineral & Fossil Localities.

Localities in this Region
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