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Chelmsford, Middlesex Co., Massachusetts, USAi
Regional Level Types
Chelmsford- not defined -
Middlesex Co.County
MassachusettsState
USACountry

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Key
Latitude & Longitude (WGS84):
42° 35' 58'' North , 71° 22' 4'' West
Latitude & Longitude (decimal):
Nearest Settlements:
PlacePopulationDistance
Chelmsford33,925 (2017)0.0km
Lowell110,699 (2017)5.6km
Westford21,587 (2017)6.2km
Carlisle4,799 (2017)8.0km
Billerica39,904 (2017)9.3km


Chelmsford was officially incorporated as a town in 1655.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List

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

28 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:

Actinolite
Formula: ☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Almandine
Formula: Fe2+3Al2(SiO4)3
Brookite
Formula: TiO2
Reference: Cook, L.P. (1974) Metamorphosed Carbonate Rocks of the Nashoba Formation, Eastern Massachusetts. Cambridge, Massachusetts: Harvard University PhD Dissertation, 454 pages.
Brucite
Formula: Mg(OH)2
Reference: Hitchcock, 1841. Geology of Massachusetts
Calcite
Formula: CaCO3
Chalcopyrite
Formula: CuFeS2
Reference: Gleba, P. (1978) Massachusetts Mineral and Fossil Localities. Barton, W.R., Goldsmith, C.E. (1968) New England Beryllium Investigations. U.S. Depaartment of the Interior, Bureau of Mines Report of investigations 7070. 177 pages and maps.
Chondrodite
Formula: (Mg,Fe2+)5(SiO4)2(F,OH)2
Reference: Hitchcock, 1841. Geology of Massachusetts
Diopside
Formula: CaMgSi2O6
Reference: Gleba, P. (1978) Massachusetts Mineral and Fossil Localities. Barton, W.R., Goldsmith, C.E. (1968) New England Beryllium Investigations. U.S. Depaartment of the Interior, Bureau of Mines Report of investigations 7070. 177 pages and maps.
Dolomite
Formula: CaMg(CO3)2
Reference: Cook, L.P. (1974) Metamorphosed Carbonate Rocks of the Nashoba Formation, Eastern Massachusetts. Cambridge, Massachusetts: Harvard University PhD Dissertation, 454 pages.
Fluorapatite
Formula: Ca5(PO4)3F
Reference: P Cristofono collection, 2007
Fluorite
Formula: CaF2
Reference: Gleba, P. (1978) Massachusetts Mineral and Fossil Localities. Barton, W.R., Goldsmith, C.E. (1968) New England Beryllium Investigations. U.S. Depaartment of the Interior, Bureau of Mines Report of investigations 7070. 177 pages and maps.
Forsterite
Formula: Mg2SiO4
Reference: Cook, L.P. (1974) Metamorphosed Carbonate Rocks of the Nashoba Formation, Eastern Massachusetts. Cambridge, Massachusetts: Harvard University PhD Dissertation, 454 pages.
'Garnet Group'
Formula: X3Z2(SiO4)3
Reference: Hitchcock, 1841. Geology of Massachusetts
Geikielite
Formula: MgTiO3
Reference: Cook, L.P. (1974) Metamorphosed Carbonate Rocks of the Nashoba Formation, Eastern Massachusetts. Cambridge, Massachusetts: Harvard University PhD Dissertation, 454 pages.
Grossular
Formula: Ca3Al2(SiO4)3
'Hornblende'
Reference: Gleba, P. (1978) Massachusetts Mineral and Fossil Localities. Barton, W.R., Goldsmith, C.E. (1968) New England Beryllium Investigations. U.S. Depaartment of the Interior, Bureau of Mines Report of investigations 7070. 177 pages and maps.
'Limonite'
Formula: (Fe,O,OH,H2O)
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Magnesite
Formula: MgCO3
Melanterite
Formula: Fe2+(H2O)6SO4 · H2O
Reference: Sawyer, A. (1908) Early Mining Operations Near Lowell, in Contributions of the Lowell Historical Society, vol.1.1913.
Monazite-(Ce)
Formula: Ce(PO4)
Colour: yellow-green, greenish brown, brown
Reference: Peter Cristofono collection, 2017
Pargasite
Formula: {Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Reference: Cook, 1974.
Phlogopite
Formula: KMg3(AlSi3O10)(OH)2
Reference: P. Cristofono collection, 2017
Pyrite
Formula: FeS2
Reference: Gleba, P. (1978) Massachusetts Mineral and Fossil Localities. Barton, W.R., Goldsmith, C.E. (1968) New England Beryllium Investigations. U.S. Depaartment of the Interior, Bureau of Mines Report of investigations 7070. 177 pages and maps.
Pyrrhotite
Formula: Fe7S8
Reference: Gleba, P. (1978) Massachusetts Mineral and Fossil Localities. Barton, W.R., Goldsmith, C.E. (1968) New England Beryllium Investigations. U.S. Depaartment of the Interior, Bureau of Mines Report of investigations 7070. 177 pages and maps.
Quartz
Formula: SiO2
Quartz var: Rose Quartz
Formula: SiO2
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Rutile
Formula: TiO2
Reference: Cook, L.P. (1974) Metamorphosed Carbonate Rocks of the Nashoba Formation, Eastern Massachusetts. Cambridge, Massachusetts: Harvard University PhD Dissertation, 454 pages.
'Scapolite'
Scheelite
Formula: Ca(WO4)
Reference: Gleba, P. (1978) Massachusetts Mineral and Fossil Localities. Barton, W.R., Goldsmith, C.E. (1968) New England Beryllium Investigations. U.S. Depaartment of the Interior, Bureau of Mines Report of investigations 7070. 177 pages and maps.
'Serpentine Subgroup'
Formula: D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Reference: Gleba, 1978. Massachusetts Mineral & Fossil Localities
Spinel
Formula: MgAl2O4
Spinel var: Pleonaste
Formula: (Mg,Fe)Al2O4
Reference: Hitchcock, 1841. Geology of Massachusetts
Titanite
Formula: CaTi(SiO4)O
Colour: brown
Reference: Gleba, P. (1978) Massachusetts Mineral and Fossil Localities. Barton, W.R., Goldsmith, C.E. (1968) New England Beryllium Investigations. U.S. Depaartment of the Interior, Bureau of Mines Report of investigations 7070. 177 pages and maps.
Tremolite
Formula: ☐{Ca2}{Mg5}(Si8O22)(OH)2
Zircon
Formula: Zr(SiO4)
Reference: Peter Cristofono collection, 2017

List of minerals arranged by Strunz 10th Edition classification

Group 2 - Sulphides and Sulfosalts
Chalcopyrite2.CB.10aCuFeS2
Pyrite2.EB.05aFeS2
Pyrrhotite2.CC.10Fe7S8
Group 3 - Halides
Fluorite3.AB.25CaF2
Group 4 - Oxides and Hydroxides
Brookite4.DD.10TiO2
Brucite4.FE.05Mg(OH)2
Geikielite4.CB.05MgTiO3
Quartz4.DA.05SiO2
var: Rose Quartz4.DA.05SiO2
Rutile4.DB.05TiO2
Spinel4.BB.05MgAl2O4
var: Pleonaste4.BB.05(Mg,Fe)Al2O4
Group 5 - Nitrates and Carbonates
Calcite5.AB.05CaCO3
Dolomite5.AB.10CaMg(CO3)2
Magnesite5.AB.05MgCO3
Group 7 - Sulphates, Chromates, Molybdates and Tungstates
Melanterite7.CB.35Fe2+(H2O)6SO4 · H2O
Scheelite7.GA.05Ca(WO4)
Group 8 - Phosphates, Arsenates and Vanadates
Fluorapatite8.BN.05Ca5(PO4)3F
Monazite-(Ce)8.AD.50Ce(PO4)
Group 9 - Silicates
Actinolite9.DE.10☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Almandine9.AD.25Fe2+3Al2(SiO4)3
Chondrodite9.AF.45(Mg,Fe2+)5(SiO4)2(F,OH)2
Diopside9.DA.15CaMgSi2O6
Forsterite9.AC.05Mg2SiO4
Grossular9.AD.25Ca3Al2(SiO4)3
Pargasite9.DE.15{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Phlogopite9.EC.20KMg3(AlSi3O10)(OH)2
Titanite9.AG.15CaTi(SiO4)O
Tremolite9.DE.10☐{Ca2}{Mg5}(Si8O22)(OH)2
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-
'Limonite'-(Fe,O,OH,H2O)
'Scapolite'-
'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
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
Geikielite4.3.5.2MgTiO3
AX2
Brookite4.4.5.1TiO2
Rutile4.4.1.1TiO2
Group 6 - HYDROXIDES AND OXIDES CONTAINING HYDROXYL
X(OH)2
Brucite6.2.1.1Mg(OH)2
Group 7 - MULTIPLE OXIDES
AB2X4
Spinel7.2.1.1MgAl2O4
Group 9 - NORMAL HALIDES
AX2
Fluorite9.2.1.1CaF2
Group 14 - ANHYDROUS NORMAL CARBONATES
A(XO3)
Calcite14.1.1.1CaCO3
Magnesite14.1.1.2MgCO3
AB(XO3)2
Dolomite14.2.1.1CaMg(CO3)2
Group 29 - HYDRATED ACID AND NORMAL SULFATES
AXO4·xH2O
Melanterite29.6.10.1Fe2+(H2O)6SO4 · H2O
Group 38 - ANHYDROUS NORMAL PHOSPHATES, ARSENATES, AND VANADATES
AXO4
Monazite-(Ce)38.4.3.1Ce(PO4)
Group 41 - ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
A5(XO4)3Zq
Fluorapatite41.8.1.1Ca5(PO4)3F
Group 48 - ANHYDROUS MOLYBDATES AND TUNGSTATES
AXO4
Scheelite48.1.2.1Ca(WO4)
Group 51 - NESOSILICATES Insular SiO4 Groups Only
Insular SiO4 Groups Only with all cations in octahedral [6] coordination
Forsterite51.3.1.2Mg2SiO4
Insular SiO4 Groups Only with cations in [6] and >[6] coordination
Almandine51.4.3a.2Fe2+3Al2(SiO4)3
Grossular51.4.3b.2Ca3Al2(SiO4)3
Insular SiO4 Groups Only with cations in >[6] coordination
Zircon51.5.2.1Zr(SiO4)
Group 52 - NESOSILICATES Insular SiO4 Groups and O,OH,F,H2O
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] coordination only
Chondrodite52.3.2b.2(Mg,Fe2+)5(SiO4)2(F,OH)2
Insular SiO4 Groups and O, OH, F, and H2O with cations in [6] and/or >[6] coordination
Titanite52.4.3.1CaTi(SiO4)O
Group 65 - INOSILICATES Single-Width,Unbranched Chains,(W=1)
Single-Width Unbranched Chains, W=1 with chains P=2
Diopside65.1.3a.1CaMgSi2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Pargasite66.1.3a.12{Na}{Ca2}{Mg4Al}(Al2Si6O22)(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
Phlogopite71.2.2b.1KMg3(AlSi3O10)(OH)2
Group 75 - TECTOSILICATES Si Tetrahedral Frameworks
Si Tetrahedral Frameworks - SiO2 with [4] coordinated Si
Quartz75.1.3.1SiO2
Unclassified Minerals, Mixtures, etc.
Actinolite-☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
'Garnet Group'-X3Z2(SiO4)3
'Hornblende'-
'Limonite'-(Fe,O,OH,H2O)
Quartz
var: Rose Quartz
-SiO2
'Scapolite'-
'Serpentine Subgroup'-D3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Spinel
var: Pleonaste
-(Mg,Fe)Al2O4

List of minerals for each chemical element

HHydrogen
H Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
H Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
H Limonite(Fe,O,OH,H2O)
H BruciteMg(OH)2
H Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
H Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
H MelanteriteFe2+(H2O)6SO4 · H2O
H PhlogopiteKMg3(AlSi3O10)(OH)2
CCarbon
C MagnesiteMgCO3
C CalciteCaCO3
C DolomiteCaMg(CO3)2
OOxygen
O Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
O ScheeliteCa(WO4)
O DiopsideCaMgSi2O6
O QuartzSiO2
O SpinelMgAl2O4
O TitaniteCaTi(SiO4)O
O Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
O Quartz (var: Rose Quartz)SiO2
O Limonite(Fe,O,OH,H2O)
O MagnesiteMgCO3
O Spinel (var: Pleonaste)(Mg,Fe)Al2O4
O BruciteMg(OH)2
O Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
O Garnet GroupX3Z2(SiO4)3
O CalciteCaCO3
O GrossularCa3Al2(SiO4)3
O Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
O AlmandineFe32+Al2(SiO4)3
O DolomiteCaMg(CO3)2
O RutileTiO2
O BrookiteTiO2
O ForsteriteMg2SiO4
O Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
O GeikieliteMgTiO3
O FluorapatiteCa5(PO4)3F
O MelanteriteFe2+(H2O)6SO4 · H2O
O ZirconZr(SiO4)
O PhlogopiteKMg3(AlSi3O10)(OH)2
O Monazite-(Ce)Ce(PO4)
FFluorine
F FluoriteCaF2
F Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
F FluorapatiteCa5(PO4)3F
NaSodium
Na Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
MgMagnesium
Mg Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Mg DiopsideCaMgSi2O6
Mg SpinelMgAl2O4
Mg Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Mg MagnesiteMgCO3
Mg Spinel (var: Pleonaste)(Mg,Fe)Al2O4
Mg BruciteMg(OH)2
Mg Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
Mg Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Mg DolomiteCaMg(CO3)2
Mg ForsteriteMg2SiO4
Mg Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Mg GeikieliteMgTiO3
Mg PhlogopiteKMg3(AlSi3O10)(OH)2
AlAluminium
Al SpinelMgAl2O4
Al Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Al Spinel (var: Pleonaste)(Mg,Fe)Al2O4
Al GrossularCa3Al2(SiO4)3
Al AlmandineFe32+Al2(SiO4)3
Al Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Al PhlogopiteKMg3(AlSi3O10)(OH)2
SiSilicon
Si Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Si DiopsideCaMgSi2O6
Si QuartzSiO2
Si TitaniteCaTi(SiO4)O
Si Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Si Quartz (var: Rose Quartz)SiO2
Si Chondrodite(Mg,Fe2+)5(SiO4)2(F,OH)2
Si Garnet GroupX3Z2(SiO4)3
Si GrossularCa3Al2(SiO4)3
Si Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Si AlmandineFe32+Al2(SiO4)3
Si ForsteriteMg2SiO4
Si Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Si ZirconZr(SiO4)
Si PhlogopiteKMg3(AlSi3O10)(OH)2
PPhosphorus
P FluorapatiteCa5(PO4)3F
P Monazite-(Ce)Ce(PO4)
SSulfur
S PyriteFeS2
S PyrrhotiteFe7S8
S ChalcopyriteCuFeS2
S MelanteriteFe2+(H2O)6SO4 · H2O
KPotassium
K PhlogopiteKMg3(AlSi3O10)(OH)2
CaCalcium
Ca Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Ca ScheeliteCa(WO4)
Ca DiopsideCaMgSi2O6
Ca FluoriteCaF2
Ca TitaniteCaTi(SiO4)O
Ca CalciteCaCO3
Ca GrossularCa3Al2(SiO4)3
Ca Tremolite☐{Ca2}{Mg5}(Si8O22)(OH)2
Ca DolomiteCaMg(CO3)2
Ca Pargasite{Na}{Ca2}{Mg4Al}(Al2Si6O22)(OH)2
Ca FluorapatiteCa5(PO4)3F
TiTitanium
Ti TitaniteCaTi(SiO4)O
Ti RutileTiO2
Ti BrookiteTiO2
Ti GeikieliteMgTiO3
MnManganese
Mn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
FeIron
Fe Actinolite☐{Ca2}{Mg4.5-2.5Fe0.5-2.5}(Si8O22)(OH)2
Fe PyriteFeS2
Fe PyrrhotiteFe7S8
Fe ChalcopyriteCuFeS2
Fe Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
Fe Limonite(Fe,O,OH,H2O)
Fe Spinel (var: Pleonaste)(Mg,Fe)Al2O4
Fe AlmandineFe32+Al2(SiO4)3
Fe MelanteriteFe2+(H2O)6SO4 · H2O
NiNickel
Ni Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
CuCopper
Cu ChalcopyriteCuFeS2
ZnZinc
Zn Serpentine SubgroupD3[Si2O5](OH)4 D = Mg, Fe, Ni, Mn, Al, Zn
ZrZirconium
Zr ZirconZr(SiO4)
CeCerium
Ce Monazite-(Ce)Ce(PO4)
WTungsten
W ScheeliteCa(WO4)

References

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Waters, Rev.W. (1917) History of Chelmsford Massachusetts.

Localities in this Region


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