![]() Abundant glaciers caused sea level to drop.A MASS EXTINCTION ended the Ordovician Period when ~80% of species living in the shallow seas became extinct!.What else happened during the Ordovician Period ? Later, these sedimentary rocks rose above sea level in what is now Virginia.The mountains eventually eroded, sending large amounts of sediment into the shallow sea that later solidified into sedimentary rocks (shales and sandstones).Near the end of this period, North America and northern Europe collided, forming the Taconic Mountains north of Virginia.What was Virginia like during the Ordovician Period ? They were similar to mosses and other plants without deep roots or leaves.What plants were on Earth during the Ordovician Period ? This nautiloid, known as Orthoceras is extinct today, but would have propelled itself toward you quickly by sucking in water at one end and squeezing it out at the other. ![]()
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