L-915 (Collingwood Chert): Collection includes raw material, outer surface, and naturally-weathered specimens.
L-915 (Collingwood Chert)
Collingwood Chert is also known as Fossil Hill, Grey County, Amabel, Bruce, or Manitoulin. It is white, bluish white, gray, or commonly speckled "salt and pepper" by black iron or manganese oxides and clear quartz crystals. When weathered it is patinated white, sometimes stained buff or shades of yellow or red. It has brachiopods, silicified and colonial corals, bryozoans, and echinoderm inclusions. It has a medium to very fine texture. Deposits are interbedded with host dolomite beds.
Geology remarks: Epoch- Silurian, Series- Middle Silurian, Form- Fossil Hill
Location remarks: Grey County, Ontario, Canada
Archaeology remarks: Parkhill and Thedford Paleo-Indian sites in Ontario, Canada; Vdora site, 1982, and Fisher site, 1983, by Peter Storck.
