Definition of paleozoic in English English dictionary
Of a geologic era within the Phanerozoic eon that comprises the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian periods from about 542 to 250 million years ago, from the age of trilobites to that of reptiles
Of a geologic era within the Phanerozoic eon and comprises the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian periods from about 542 to 250 million years ago, from the age of trilobites to that of reptiles
A geological term denoting the time in Earth history between 570 and 245 million years ago
Of or pertaining to, or designating, the older division of geological time during which life is known to have existed, including the Silurian, Devonian, and Carboniferous ages, and also to the life or rocks of those ages
- A geologic era that is marked by the culmination of all classes of invertebrates except insects and the appearance of seed-bearing plants, amphibians and reptiles The Paleozoic era is divided into seven periods designated by inundations of seas The Mississippian and Pennsylvanian periods of Kentucky occurred during the Paleozoic era
{s} of the Paleozoic Era, pertaining to the early geological period in which fish reptile and insects first appeared on Earth
— A geological term denoting the time in Earth history between about 570 and 245 million years ago
An era of geologic time, from the end of the Precambrian to the beginning of the Mesozoic, spanning the time between 544 and 248 million years ago The word Paleozoic is from Greek and means "old life "
The era containing the Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian periods It is usually divided into upper and lower with three periods in each division
The interval of geologic time from the Cambrian through the Permian Periods, roughly 540 to 245 million years ago
or Palaeozoic Era Major interval of geologic time, 543-248 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. It is divided into six periods: (from oldest to youngest) the Cambrian, Ordovician, Silurian, Devonian, Carboniferous, and Permian. During the early Paleozoic, much of North America was covered by a warm, shallow sea with many coral reefs. Fossils from this time include marine invertebrates and primitive fish; the plants were predominantly algae, with some mosses and ferns. During the late Paleozoic, huge, swampy forest regions covered much of the northern continents. Plant and animal life flourished. Amphibians left the oceans to live on land, reptiles evolved as fully terrestrial life forms, and insect life began. Ferns grew to tree size, and precursors of the conifers appeared