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Paleozoic    音标拼音: [p,eliəz'oɪk]
a. 古生代的
n. 古生代

古生代的古生代

Paleozoic
adj 1: of or relating to or denoting the Paleozoic era
n 1: from 544 million to about 230 million years ago [synonym:
{Paleozoic}, {Paleozoic era}]


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  • Paleozoic - Wikipedia
    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
    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 The major
  • The Paleozoic Era - University of California Museum of Paleontology
    The Paleozoic is bracketed by two of the most important events in the history of animal life At its beginning, multicelled animals underwent a dramatic "explosion" in diversity, and almost all living animal phyla appeared within a few millions of years At the other end of the Paleozoic, the largest mass extinction in history wiped out approximately 90% of all marine animal species The
  • Paleozoic | U. S. Geological Survey - USGS. gov
    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 Life was primitive during the Paleozoic and included many invertebrates (animals without backbones) and the earliest fish and amphibians
  • Paleozoic Era - U. S. National Park Service
    Common Paleozoic fossils include trilobites and cephalopods, as well as insects and ferns The greatest mass extinction in Earth's history ended this era Paleozoic Resources The Paleozoic Era is further divided in to seven periods sub-periods: the Cambrian, the Ordovician, the Silurian, the Devonian, the Mississippian, the Pennsylvanian, the
  • 8. 4: Paleozoic Era - Geosciences LibreTexts
    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 Lungs evolved and life emerged from the sea onto land to become the first four-legged tetrapods, amphibians
  • Paleozoic Era - an overview | ScienceDirect Topics
    The Paleozoic Era is divided into the Cambrian, Ordovician, Silurian, Devonian, and Carboniferous periods, each with characteristic groups of fossils The Cambrian Period saw the explosion of new kinds of invertebrate animals in the oceans, including trilobites (Figure 2), primitive kinds of shellfish, including brachiopods and molluscs, and other groups of invertebrates that failed to survive
  • Paleozoic - ScienceDaily
    The Paleozoic Era is a major division of the geologic timescale, one of four geologic eras The Paleozoic includes six geologic periods; from oldest to youngest -- the Cambrian, Ordovician
  • Paleozoic - New World Encyclopedia
    The Paleozoic era (from the Greek palaio, meaning "old" and zoion, "animals," meaning "ancient life") is an interval of about 291 million years defined on the geologic timescale as spanning roughly from 542 to 251 million years ago (mya), and as being the earliest of three eras of the Phanerozoic eon The Paleozoic era is followed by the Mesozoic and Cenozoic eras The Paleozoic era comprises
  • Paleozoic Era | Geology | Research Starters - EBSCO
    <p>The Paleozoic Era, spanning from approximately 544 to 251 million years ago, is the oldest era of the Phanerozoic eon and marks a significant period in Earth #039;s history characterized by diverse and complex life forms This era is divided into seven distinct periods: Cambrian, Ordovician, Silurian, Devonian, Mississippian, Pennsylvanian, and Permian Fossils play a crucial role in





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