The limestones are very fossiliferous .
The limestones contain evidence of the abundant marine life that existed at the time of their creation , including fossil crinoids ( sea - lilies ) , corals and brachiopods .
The limestones are very fossiliferous , and contain evidence of the abundant marine life that existed at the time of their creation , including fossil crinoids ( sea - lilies ) , corals and brachiopods .