Paleozoic


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Pa·le·o·zo·ic

 (pā′lē-ə-zō′ĭk)
adj.
Of, relating to, or being the era of geologic time from about 542 to 251 million years ago. The Paleozoic Era includes the Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, and Permian Periods and is characterized by the appearance of marine invertebrates, primitive fishes, land plants, and primitive reptiles. The end of this era is marked by the largest recorded mass extinction in the earth's history, in which 90 percent of marine life forms were wiped out. See Table at geologic time.
n.
The Paleozoic Era.

Pa•le•o•zo•ic

(ˌpeɪ li əˈzoʊ ɪk; esp. Brit. ˌpæl i-)

adj.
1. noting or pertaining to a geologic era occurring between 570 million and 230 million years ago, when fish, insects, and reptiles first appeared.
n.
2. the Paleozoic Era or group of systems.
[1830–40; paleo- + -zoic]

Pa·le·o·zo·ic

(pā′lē-ə-zō′ĭk)
The era of geologic time from about 540 to 245 million years ago. The Paleozoic Era is characterized by the appearance of marine invertebrate animals, primitive fish and reptiles, and land plants. See Chart at geologic time.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.Paleozoic - from 544 million to about 230 million years agoPaleozoic - from 544 million to about 230 million years ago
Permian, Permian period - from 280 million to 230 million years ago; reptiles
Carboniferous, Carboniferous period - from 345 million to 280 million years ago
Age of Fishes, Devonian, Devonian period - from 405 million to 345 million years ago; preponderance of fishes and appearance of amphibians and ammonites
Silurian, Silurian period - from 425 million to 405 million years ago; first air-breathing animals
Ordovician, Ordovician period - from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
Cambrian, Cambrian period - from 544 million to about 500 million years ago; marine invertebrates
Adj.1.Paleozoic - of or relating to or denoting the Paleozoic era
Translations

Paleozoic

adjpaläozoisch
References in periodicals archive ?
He covers four ages: Precambrian, Paleozoic, Mesozoic, and Cenozoic in the context of the Wisconsin-state park system.
Known as SWM A-2X, the company says that the exploratory well has been drilled to a total depth of 5,090m and encountered 18m of light oil in the Paleozoic sandstones of Dessouky formation of Carboniferous age.
The exploratory well, named SWM A-2X, has been drilled to a total depth of 5,090 meters and encountered 18 meters of light oil in the Paleozoic sandstones of Dessouky Formation of Carboniferous age.
Tectonic developments in the Paleozoic and great earth movements in the Early Mesozoic brought about elevations in Syria called paleohighs.
This project covers zones with silicification and samples with anomalous gold in both Paleozoic carbonate rocks and overlying Tertiary volcanic rocks along a 40 km long belt.
The exploration targets for natural gas in the Ordos Basin mainly consist of the Upper Paleozoic Carboniferous-Permian tight sandstone and the Lower Paleozoic Ordovician carbonate reservoirs.
This evidenced the continuous widespread deposition along the northwestern Indian passive margin during Early Paleozoic.
In the basin, the gas resources of Upper Paleozoic coal measures mainly distribute in the East and principally includes the east of Yanan area in the Yishan slope and the deflection fold belt in western Shanxi (Fig.
and blue sage painted over Paleozoic pages of stone,
Pettijohn, Bernie's thesis, completed in 1957, was a pioneering analysis of the Pocono sandstone formation of late Paleozoic age in the Central Appalachian basin, which unequivocally indicated that the sediment source was a continental landmass in the east.
Baltica, one of the major continental blocks during the Paleozoic, remained isolated after its Neoproterozoic detachment from Rodinia until its collision with Laurentia during the Silurian-Devonian.