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It's a showdown with rare earth elemental ore Monazite-(Ce) and index mineral Andalusite.
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Marcasite from
New Thorold quarry, Thorold Quarry (Walker Quarry), Thorold Township, Niagara Region, Ontario, Canada


Locality type:Quarry
Classification
Species:Marcasite
Formula:FeS2
Confirmation
Validity:Believed Valid
Associated Minerals Based on Photo Data:
Dolomite3
Calcite1
Data
Mineral Data:Click here to view Marcasite data
Locality Data:Click here to view New Thorold quarry, Thorold Quarry (Walker Quarry), Thorold Township, Niagara Region, Ontario, Canada
Data Identifiers
Mindat Occurrence Record ID:943114
Long-form Identifier:1:3:943114:0
GUID (UUID V4):0
Nearest other occurrences of Marcasite
0.3km (0.2 miles) ⓘThorold Quarry (Walker Quarry), Thorold Township, Niagara Region, Ontario, Canada
0.7km (0.4 miles) ⓘOld Thorold quarry, Thorold Quarry (Walker Quarry), Thorold Township, Niagara Region, Ontario, Canada
6.6km (4.1 miles) ⓘLaFarge-Queenston quarry, Niagara Township, Niagara Region, Ontario, Canada
26.5km (16.5 miles) ⓘSpring Creek Aggregates, Clinton Township, Niagara Region, Ontario, Canada
26.9km (16.7 miles) ⓘLincoln Quarry (Beamsville Quarry), Clinton Township, Niagara Region, Ontario, Canada
35.8km (22.2 miles) ⓘHolcim Quarry, Lockport, Niagara County, New York, USA
60.2km (37.4 miles) ⓘSpring Creek, Alden, Erie County, New York, USA
61.8km (38.4 miles) ⓘNelson Quarry, Burlington, Halton Region, Ontario, Canada
63.1km (39.2 miles) ⓘWaterdown area, East Flamborough Township, Hamilton, Ontario, Canada
63.8km (39.7 miles) ⓘClappisons road cut, East Flamborough Township, Hamilton, Ontario, Canada
References
Sabina, Ann P. (1986) Rocks and minerals for the collector: Bancroft - Parry Sound area and southern Ontario. Miscellaneous Report 39. Geological Survey of Canada 182 pp. doi:10.4095/121046
 
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