The Ordovician period, occurring approximately 485 to 444 million years ago, is characterized by significant geological activity that led to the formation of various crustal features. During this time, the Earth's continents underwent substantial shifts, leading to the development of new landmasses and the accumulation of sedimentary rock layers. Key formations from this period include the Taconic Orogeny in North America, which resulted in the uplift of mountains, and extensive marine deposits that indicate a rich diversity of life. The Ordovician crust formations primarily consist of sandstone, shale, and limestone, reflecting both terrestrial and marine environments.
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