Paleozoic - Wikipedia
网页The Paleozoic was a time of dramatic geological, climatic, and evolutionary change. The Cambrian witnessed the most rapid and widespread diversification of life in Earth's history, known as the Cambrian explosion, in which most modern phyla first appeared.
Paleozoic Era | Description, Climate, & Facts | Britannica
网页2024年8月9日 · Paleozoic Era, major interval of geologic time that began 538.8 million years ago with the Cambrian explosion, an extraordinary diversification of marine animals, and ended about 252 million years ago with the end-Permian extinction, the greatest extinction event in Earth history.
Paleozoic Era: Facts & Information - Live Science
网页2013年6月20日 · The Paleozoic Era, which ran from 541 million to 251.9 million years ago, was a time of great change on Earth. The era began with the breakup of one supercontinent and the formation...
Paleozoic | U.S. Geological Survey - USGS.gov
网页Paleozoic (541-252 million years ago) means ‘ancient life.’ The oldest animals on Earth appeared just before the start of this era in the Ediacaran Period, but scientists had not yet discovered them when the geologic timescale was made.
The Paleozoic Era - University of California Museum of Paleontology
网页The Paleozoic is divided into six periods: the Cambrian, Ordovician, Silurian, Devonian, Carboniferous (in the U.S., this is divided into the Mississippian and Pennsylvanian Periods), and Permian. Most of these names derive from locations where rocks of …
Paleozoic Era summary | Britannica
网页Paleozoic Era, or Palaeozoic Era, Major interval of geologic time, c. 542–251 million years ago. From the Greek for “ancient life,” it is the first era of the Phanerozoic Eon and is followed by the Mesozoic Era.
8.4: Paleozoic Era - Geosciences LibreTexts
网页2024年8月21日 · The Paleozoic era was dominated by marine organisms, but by the middle of the era, plants and animals had evolved to live and reproduce on land, including amphibians and reptiles. Fish evolved jaws and fins evolved into jointed limbs.
Periods of the Paleozoic Era - ThoughtCo
网页2019年5月23日 · Learn about the periods of the Paleozoic Era, from the Cambrian Period (542–488 million years ago) to the Permian Period (297–251 million years ago).
Paleozoic Era - U.S. National Park Service
网页2023年7月5日 · During the Paleozoic Era (541 to 251.9 million years ago), fish diversified and marine organisms were very abundant. In North America, the Paleozoic is characterized by multiple advances and retreats of shallow seas and repeated continental collisions that formed the Appalachian Mountains.
Paleozoic Era - Encyclopedia.com
网页2018年6月11日 · The Paleozoic Era spanned that period of geologic time during which the evolution of the first invertebrates, vertebrates, terrestrial (land-based) plants, bony fish, reptiles, insects, etc. took place.