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28 de jun. de 2024 · 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.
- Psilophytes
Paleozoic Era. In Paleozoic Era: Paleozoic life. Leafless...
- Conodonts
conodont, minute toothlike fossil composed of the mineral...
- Mississippian
Mississippian Subperiod, first major subdivision of the...
- Ediacara Fauna
Ediacara fauna, unique assemblage of soft-bodied organisms...
- Ordovician Period
Ordovician Period, in geologic time, the second period of...
- Proterozoic Eon
Proterozoic Eon, the younger of the two divisions of...
- Supercontinent
supercontinent, large landmass that accounts for the vast...
- Silurian Period
Silurian Period, in geologic time, the third period of the...
- Psilophytes
13 de jun. de 2024 · Ordovician Period, in geologic time, the second period of the Paleozoic Era. It began 485.4 million years ago and ended 443.8 million years ago. The interval was a time of intense diversification (an increase in the number of species) of marine animal life in what became known as the Ordovician radiation.
2 de jul. de 2024 · The Cretaceous–Paleogene (K–Pg) extinction event, also known as the Cretaceous–Tertiary (K–T) extinction, was a sudden mass extinction of three-quarters of the plant and animal species on Earth, approximately 66 million years ago. The event caused the extinction of all non-avian dinosaurs.
26 de jun. de 2024 · Approximately 251.9 million years ago, the Permian–Triassic (P–T, P–Tr) extinction event (PTME; also known as the Late Permian extinction event, the Latest Permian extinction event, the End-Permian extinction event, and colloquially as the Great Dying) forms the boundary between the Permian and Triassic geologic periods, and ...
Hace 2 días · The Permian ended with the most extensive extinction event recorded in paleontology: the Permian–Triassic extinction event. 90 to 95% of marine species became extinct, as well as 70% of all land organisms.
1 de jul. de 2024 · The Cenozoic Era is generally divided into three periods: the Paleogene (66 million to 23 million years ago), the Neogene (23 million to 2.6 million years ago), and the Quaternary (2.6 million years ago to the present); however, the era has been traditionally divided into the Tertiary and Quaternary periods.
26 de jun. de 2024 · Most noticeably, extinction occurred at very low background rates in the IAA throughout its Cenozoic history, except for the small and discrete peaks as mentioned in the last paragraph (Fig....
