Description:A sedimentary rock formed from calcium carbonate deposited on a shallow, tropical sea-floor. Calcium carbonate is formed as a result of the living processes of plants and animals. In this rock, white areas are veins, formed when the rock was fractured while below the surface, and the fractures were filled by more calcium carbonate deposited from hot groundwater.
Representing:Paleozoic sedimentary rock of Western Canada Sedimentary Basin, deposited in the Mississippian Period, about 340 million
Original location:Exshaw Quarry, Alberta