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Marlborough Junction locality, Marlborough, Middlesex Co., Massachusetts, USAi
Regional Level Types
Marlborough Junction locality- not defined -
Marlborough- not defined -
Middlesex Co.County
MassachusettsState
USACountry

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Latitude & Longitude (WGS84):
42° 19' 54'' North , 71° 32' 28'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Marlborough39,818 (2017)1.8km
Southborough9,686 (2017)3.2km
Hudson14,907 (2017)7.0km
Cordaville2,650 (2017)7.1km
Northborough6,167 (2017)8.3km


Bedrock outcrops, primarily of metamorphic rock including gneiss, calc-silicate rock and marble, were exposed during building/office park construction near Rt. 85 in the Marlboro Junction area in the south part of Marlborough near the Southboro town line in 2006.

(This is not the same locality as the better known I-290/I-495 interchange road cuts in the northwest part of Marlborough.)

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


16 valid minerals.

Detailed Mineral List:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Habit: bladed crystals
Colour: dark green
Reference: P Cristofono collection, 2006
'Albite-Anorthite Series'
Reference: P Cristofono collection, 2006
Almandine
Formula: Fe2+3Al2(SiO4)3
Colour: dark red
Reference: P Cristofono collection, 2006
'Biotite'
Formula: K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Colour: black
Reference: P Cristofono collection, 2006
Calcite
Formula: CaCO3
Habit: massive
Colour: white
Reference: P Cristofono collection, 2006
Chabazite-Ca
Formula: (Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Reference: P Cristofono collection
Chalcopyrite
Formula: CuFeS2
Habit: massive
Colour: brassy
Description: associated with malachite
Reference: P Cristofono collection, 2006
Clinozoisite
Formula: {Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Habit: good crystals
Colour: pale brown, pale green
Reference: P Cristofono collection, 2006
Diopside
Formula: CaMgSi2O6
Habit: crystals in marble
Colour: green
Reference: P Cristofono collection, 2006
Epidote
Formula: {Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Habit: crystals and massive
Colour: green
Description: associated with pyrite
Reference: P Cristofono collection, 2006
Goethite
Formula: α-Fe3+O(OH)
Reference: P Cristofono collection, 2007
Grossular
Formula: Ca3Al2(SiO4)3
Habit: good crystals in calcite
Colour: light brown, red
Reference: P Cristofono collection, 2006
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: P Cristofono collection, 2006
Malachite
Formula: Cu2(CO3)(OH)2
Habit: massive
Description: associated with chalcopyrite
Reference: P Cristofono collection, 2006
Opal
Formula: SiO2 · nH2O
Habit: amorphous
Colour: cololress, white
Fluorescence: yes
Reference: P Cristofono collection, 2006
Opal var: Opal-AN
Formula: SiO2 · nH2O
Habit: amorphous
Colour: cololress, white
Fluorescence: yes
Reference: P Cristofono collection, 2006
Pyrite
Formula: FeS2
Reference: P Cristofono collection, 2006
Quartz
Formula: SiO2
Reference: P Cristofono collection, 2006
'Scapolite'
Colour: colorless, white
Description: Intermediate scapolite.
Reference: P Cristofono collection
'Stilbite subgroup'
Habit: crystals
Colour: white
Description: crystals associated with chabazite and epidote
Reference: P Cristofono collection, 2007
Titanite
Formula: CaTi(SiO4)O
Habit: crystals in marble
Colour: brown
Reference: P Cristofono collection, 2007
Vesuvianite
Formula: (Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Colour: brown
Reference: P. Cristofono collection, 2014

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Group 4 - Oxides and Hydroxides
Goethite4.00.α-Fe3+O(OH)
Opal4.DA.10SiO2 · nH2O
var: Opal-AN4.DA.10SiO2 · nH2O
Quartz4.DA.05SiO2
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Malachite5.BA.10Cu2(CO3)(OH)2
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Almandine9.AD.25Fe2+3Al2(SiO4)3
Chabazite-Ca9.GD.10(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Clinozoisite9.BG.05a{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Diopside9.DA.15CaMgSi2O6
Epidote9.BG.05a{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Grossular9.AD.25Ca3Al2(SiO4)3
Titanite9.AG.15CaTi(SiO4)O
Vesuvianite9.BG.35(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Unclassified Minerals, Rocks, etc.
'Albite-Anorthite Series'-
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Limonite'-(Fe,O,OH,H2O)
'Scapolite'-
'Stilbite subgroup'-

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 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
XO(OH)
Goethite6.1.1.2α-Fe3+O(OH)
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Group 16a - ANHYDROUS CARBONATES CONTAINING HYDROXYL OR HALOGEN
Malachite16a.3.1.1Cu2(CO3)(OH)2
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
Grossular51.4.3b.2Ca3Al2(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 [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
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)
Clinozoisite58.2.1a.4{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Epidote58.2.1a.7{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Vesuvianite58.2.4.1(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Si Tetrahedral Frameworks - SiO2 with H2O and organics
Opal75.2.1.1SiO2 · nH2O
Group 77 - TECTOSILICATES Zeolites
Zeolite group - True zeolites
Chabazite-Ca77.1.2.1(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Albite-Anorthite Series'-
'Biotite'-K(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
'Limonite'-(Fe,O,OH,H2O)
Opal
var: Opal-AN
-SiO2 · nH2O
'Scapolite'-
'Stilbite subgroup'-

List of minerals for each chemical element

HHydrogen
H Opal (var: Opal-AN)SiO2 · nH2O
H Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
H Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
H MalachiteCu2(CO3)(OH)2
H BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Limonite(Fe,O,OH,H2O)
H Goethiteα-Fe3+O(OH)
H Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
H Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
H OpalSiO2 · nH2O
BBoron
B Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
CCarbon
C CalciteCaCO3
C MalachiteCu2(CO3)(OH)2
OOxygen
O GrossularCa3Al2(SiO4)3
O QuartzSiO2
O CalciteCaCO3
O DiopsideCaMgSi2O6
O Opal (var: Opal-AN)SiO2 · nH2O
O Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
O Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
O MalachiteCu2(CO3)(OH)2
O BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O AlmandineFe32+Al2(SiO4)3
O Limonite(Fe,O,OH,H2O)
O TitaniteCaTi(SiO4)O
O Goethiteα-Fe3+O(OH)
O Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
O Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
O OpalSiO2 · nH2O
FFluorine
F BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
F Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
NaSodium
Na Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Na Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
MgMagnesium
Mg DiopsideCaMgSi2O6
Mg BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
AlAluminium
Al GrossularCa3Al2(SiO4)3
Al Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Al Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Al BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Al AlmandineFe32+Al2(SiO4)3
Al Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Al Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
SiSilicon
Si GrossularCa3Al2(SiO4)3
Si QuartzSiO2
Si DiopsideCaMgSi2O6
Si Opal (var: Opal-AN)SiO2 · nH2O
Si Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Si Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Si BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si AlmandineFe32+Al2(SiO4)3
Si TitaniteCaTi(SiO4)O
Si Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Si Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
Si OpalSiO2 · nH2O
SSulfur
S PyriteFeS2
S ChalcopyriteCuFeS2
KPotassium
K BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
K Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
CaCalcium
Ca GrossularCa3Al2(SiO4)3
Ca CalciteCaCO3
Ca DiopsideCaMgSi2O6
Ca Clinozoisite{Ca2}{Al3}(Si2O7)(SiO4)O(OH)
Ca Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca TitaniteCaTi(SiO4)O
Ca Chabazite-Ca(Ca,K2,Na2)2[Al2Si4O12]2 · 12H2O
Ca Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
TiTitanium
Ti TitaniteCaTi(SiO4)O
FeIron
Fe Epidote{Ca2}{Al2Fe3+}(Si2O7)(SiO4)O(OH)
Fe PyriteFeS2
Fe ChalcopyriteCuFeS2
Fe BiotiteK(Fe2+/Mg)2(Al/Fe3+/Mg)([Si/Al]Si2O10)(OH/F)2
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe AlmandineFe32+Al2(SiO4)3
Fe Limonite(Fe,O,OH,H2O)
Fe Goethiteα-Fe3+O(OH)
Fe Vesuvianite(Ca,Na,☐)19(Al,Mg,Fe3+)13(☐,B,Al,Fe3+)5(Si2O7)4(SiO4)10(OH,F,O)10
CuCopper
Cu ChalcopyriteCuFeS2
Cu MalachiteCu2(CO3)(OH)2

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: 3186140
Paleozoic sedimentary and volcanic rocks

Age: Paleozoic (358.9 - 443.8 Ma)

Lithology: Mudstone-carbonate-sandstone-conglomerate

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]

Silurian - Precambrian
419.2 - 4000 Ma



ID: 2953099
Granodiorite of the Indian Head pluton

Age: Eoarchean to Silurian (419.2 - 4000 Ma)

Description: Light-gray to pinkish-gray, fine- to medium-grained biotite granodiorite, and gray fine-grained hornblende-biotite tonalite. Intrudes OZm.

Comments: Part of Nashoba Zone (Silurian and Older Rocks); age uncertain Original map source: Unpublished Digital Geologic Map of Massachusetts received from Rudi Hon of Boston College in 1998; based on the 1983 USGS paper version (MA002).

Lithology: Major:{granodiorite,tonalite}

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


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