The Ordovician is a geologic period and system, the second of six of the
Paleozoic Era, that spans 41.2 million years from the end of the Cambrian Period
The Ordovician Period lasted almost 45 million years, beginning 488.3 million
years ago and ending 443.7 million years ago.* During this period, the area north
Ordovician strata are characterized by numerous and diverse trilobites and
conodonts (phosphatic fossils with a tooth-like appearance) found in sequences
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prehistoric periods from National Geographic.
Sep 29, 2015 ... Ordovician Period, in geologic time, the second period of the Paleozoic Era. It
began 485.4 million years ago, following the Cambrian Period, ...
During the Ordovician Life expanded in diversity tremendously. There were
extensive reef complexes in the tropics. The early Ordovician was thought to be
Ordovician Life Metazoan invertebrates dominated Ordovician life. While far less
famous than the Cambrian Explosion, the Ordovician encompassed a massive ...
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Make research projects and school reports about Ordovician period easy with ...
The Ordovician Period is the second period of the Paleozoic Era. The Ordovician
Period began about 490 million years ago and lasted for about 47 million ...
The Ordovician Period is the second period of the Paleozoic Era. This important
period saw the origin and rapid evolution of many new types of invertebrate ...