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Mont Shefford, Brome-Missisquoi RCM, Montérégie, Québec, Canadai
Regional Level Types
Mont SheffordMountain
Brome-Missisquoi RCMRegional County Municipality
Montérégie- not defined -
QuébecProvince
CanadaCountry

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Latitude & Longitude (WGS84): 45° 22' North , 72° 37' West
Latitude & Longitude (decimal): 45.36667,-72.61667
GeoHash:G#: f2h65ddpv
Locality type:Mountain
Köppen climate type:Dfb : Warm-summer humid continental climate
Nearest Settlements:
PlacePopulationDistance
Bromont6,049 (2016)6.1km
Waterloo4,064 (2016)8.1km
Granby53,979 (2017)9.8km
Lac-Brome5,629 (2016)18.4km
Cowansville10,887 (2017)21.2km


Mont Shefford is one of the Monteregian Hills intrusions, roughly oval-shaped apprimately 7 x 4 km at the base and intrudes Cambro-Ordovician sedimentary rocks. It comprises dioritic and gabbroice rocks, nepheline monzodiorite, pulaskite, nordmarkite, breccias and subvolcanic porphyries.
Age estimates are 119±8 Ma to 138±8 Ma.

Regions containing this locality

North America PlateTectonic Plate

Select Mineral List Type

Standard Detailed Strunz Dana Chemical Elements

Mineral List


10 valid minerals.

Detailed Mineral List:

Aegirine-augite
Formula: (NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
'Apatite'
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
Augite
Formula: (CaxMgyFez)(Mgy1Fez1)Si2O6
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
'Biotite'
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
Cancrinite
Formula: (Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
'Fayalite-Tephroite Series'
Reference: Frisch, T. (1972) Iron Knebelite from the Nordmarkite of Shefford Miuntain, Quebec. Canadian Mineralogist, 11, 552-553.
'Fayalite-Tephroite Series var: Knebelite'
Formula: from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
Reference: Frisch, T. (1972) Iron Knebelite from the Nordmarkite of Shefford Miuntain, Quebec. Canadian Mineralogist, 11, 552-553.
Hastingsite
Formula: {Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
Kaersutite
Formula: {Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
Nepheline
Formula: Na3K(Al4Si4O16)
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
Quartz
Formula: SiO2
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
Sodalite
Formula: Na8(Al6Si6O24)Cl2
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
Titanite
Formula: CaTi(SiO4)O
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
Zircon
Formula: Zr(SiO4)
Reference: DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.

List of minerals arranged by Strunz 10th Edition classification

Group 4 - Oxides and Hydroxides
Quartz4.DA.05SiO2
Group 9 - Silicates
Aegirine-augite9.DA.20(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Augite9.DA.15(CaxMgyFez)(Mgy1Fez1)Si2O6
Cancrinite9.FB.05(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Hastingsite9.DE.15{Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2
Kaersutite9.DE.15{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Nepheline9.FA.05Na3K(Al4Si4O16)
Sodalite9.FB.10Na8(Al6Si6O24)Cl2
Titanite9.AG.15CaTi(SiO4)O
Zircon9.AD.30Zr(SiO4)
Unclassified Minerals, Rocks, etc.
'Apatite'-
'Biotite'-
'Fayalite-Tephroite Series'-
'var: Knebelite'-from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4

List of minerals arranged by Dana 8th Edition classification

Group 51 - NESOSILICATES Insular SiO4 Groups Only
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] 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
Aegirine-augite65.1.3b.2(NaaCabFe2+cMgd)(Fe3+eAlfFe2+gMgh)Si2O6
Augite65.1.3a.3(CaxMgyFez)(Mgy1Fez1)Si2O6
Group 66 - INOSILICATES Double-Width,Unbranched Chains,(W=2)
Amphiboles - Mg-Fe-Mn-Li subgroup
Kaersutite66.1.3a.18{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
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 Feldspathoids and related species
Cancrinite76.2.5.3(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Nepheline76.2.1.2Na3K(Al4Si4O16)
Sodalite76.2.3.1Na8(Al6Si6O24)Cl2
Unclassified Minerals, Mixtures, etc.
'Apatite'-
'Biotite'-
'Fayalite-Tephroite Series'-
'var: Knebelite'-from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
Hastingsite-{Na}{Ca2}{Fe2+4Fe3+}(Al2Si6O22)(OH)2

List of minerals for each chemical element

HHydrogen
H Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
H Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
CCarbon
C Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
OOxygen
O NephelineNa3K(Al4Si4O16)
O SodaliteNa8(Al6Si6O24)Cl2
O Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
O Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
O Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
O Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
O Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
O TitaniteCaTi(SiO4)O
O ZirconZr(SiO4)
O QuartzSiO2
O Fayalite-Tephroite Series (var: Knebelite)from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
NaSodium
Na NephelineNa3K(Al4Si4O16)
Na SodaliteNa8(Al6Si6O24)Cl2
Na Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Na Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Na Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
Na Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
MgMagnesium
Mg Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Mg Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Mg Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
AlAluminium
Al NephelineNa3K(Al4Si4O16)
Al SodaliteNa8(Al6Si6O24)Cl2
Al Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Al Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Al Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
Al Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
SiSilicon
Si NephelineNa3K(Al4Si4O16)
Si SodaliteNa8(Al6Si6O24)Cl2
Si Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Si Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Si Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
Si Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Si Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Si TitaniteCaTi(SiO4)O
Si ZirconZr(SiO4)
Si QuartzSiO2
Si Fayalite-Tephroite Series (var: Knebelite)from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
SSulfur
S Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
ClChlorine
Cl SodaliteNa8(Al6Si6O24)Cl2
KPotassium
K NephelineNa3K(Al4Si4O16)
CaCalcium
Ca Cancrinite(Na,Ca,☐)8(Al6Si6O24)(CO3,SO4)2 · 2H2O
Ca Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Ca Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
Ca Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Ca Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Ca TitaniteCaTi(SiO4)O
TiTitanium
Ti Kaersutite{Na}{Ca2}{Mg3AlTi}(Al2Si6O22)O2
Ti TitaniteCaTi(SiO4)O
MnManganese
Mn Fayalite-Tephroite Series (var: Knebelite)from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
FeIron
Fe Hastingsite{Na}{Ca2}{Fe42+Fe3+}(Al2Si6O22)(OH)2
Fe Augite(CaxMgyFez)(Mgy1Fez1)Si2O6
Fe Aegirine-augite(NaaCabFec2+Mgd)(Fee3+AlfFeg2+Mgh)Si2O6
Fe Fayalite-Tephroite Series (var: Knebelite)from (Fe1.5Mn0.5)2SiO4 to (Mn1.5Fe0.5)2SiO4
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

Paleozoic
251.902 - 541 Ma



ID: 3187973
Paleozoic sedimentary rocks

Age: Phanerozoic (251.902 - 541 Ma)

Lithology: Sedimentary 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)
ADAMS, F.D. (1903) The Monteregian Hills a Canadian petrographical province. Journal of Geology, 11, 239 282.
ADAMS, F.D. (1913) The Monteregian Hills. International Geological Congress, Guide Book #3. 29-80. Geological Survey of Canada, Ottawa.
CURRIE, K.L. (1970) An hypothesis on the origin of alkaline rocks suggested by the tectonic setting of the Monteregian Hills. Canadian Mineralogist, 10, 411-420.
CURRIE, K.L.(1976) The Alkaline Rocks of Canada. Geological Survey of Canada Bulletin 239.
DRESSER, J.A. (1902) Report on the geology and petrography of Shefford Mountain. Geological Survey of Canada, Annual Report 13, L: 1-35.
DRESSER, J.A., and DENIS, T.C. (1944) Geology of Quebec. Vol. II, 469 470, Geological Report 20. Province of Quebec Department of Mines.
PHILPOTTS, A.R. (1970) Mechanism of emplacement of the Monteregian intrusion. In Alkali Rocks: The Monteregian Hills. Editor Perrault, G. Published by: Mineralogical Association of Canada.
WOOLEY, A.R. (1987) In: Alkaline Rocks and Carbonatites of the World. Part 1: North and South America. Published by University of Texas Press, Austin. 49 57.
Frisch, T. (1972) Iron Knebelite from the Nordmarkite of Shefford Miuntain, Quebec. Canadian Mineralogist, 11, 552-553.


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