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, there are fossil remains of several different animals including colonial and solitary corals, and much smaller fragments of crinoids (also known as sea-lillies).
Representing:Paleozoic sedimentary rock of Western Canada Sedimentary Basin, deposited in the Mississippian Period, about 340 million
Original location:Exshaw Quarry, Alberta