Palaeozoic
Palaeozoic The first (570–248 Ma) of the three eras of the Phanerozoic. The Cambrian, Ordovician, and Silurian Periods together form the Lower Palaeozoic sub-era; the Devonian, Carboniferous, and Permian the Upper Palaeozoic sub-era. During the Palaeozoic, two major orogenies occurred: the Caledonian during the Lower Palaeozoic, and the Variscan in late Palaeozoic times. The faunas of the Palaeozoic are noted for the presence of many invertebrate organisms, including trilobites (Trilobita), graptolites (Graptolithina), brachiopods (Brachiopoda), cephalopods (Cephalopoda), and corals. By the end of the era, amphibians and reptiles were major components of various communities and giant tree-ferns, horsetails, and cycads gave rise to extensive forests.
Palaeozoic
Palaeozoic (Paleozoic) The first of the 3 eras of the Phanerozoic, about 590–248 Ma ago. The Cambrian, Ordovician, and Silurian Periods together form the Lower Palaeozoic Sub-Era; the Devonian, Carboniferous, and Permian the Upper Palaeozoic Sub-Era. It was an era of great evolutionary change among plants, which began to invade the land at its beginning. By the end of the era, amphibians and reptiles were major components of various communities and giant treeferns, horsetails (Calamitaceae), and cycads (Cycadaceae) gave rise to extensive forests. The name is derived from palaeo- and the Greek zoe, meaning ‘life’.
Palaeozoic
Palaeozoic (Paleozoic) The first of the three eras of the Phanerozoic, about 542–251 Ma ago. The Cambrian, Ordovician, and Silurian Periods together form the Lower Palaeozoic Sub-Era; the Devonian, Carboniferous, and Permian the Upper Palaeozoic Sub-Era. The faunas of the Palaeozoic are noted for the presence of many invertebrate organisms including Trilobitomorpha, Graptolithina, Brachiopoda, Cephalopoda, and corals. By the end of the era, amphibians and reptiles were major components of various communities and giant tree-ferns, horsetails, and cycads gave rise to extensive forests.
Palaeozoic
Palaeozoic(Paleozoic) The first of the three eras of the Phanerozoic, about 570–248 Ma ago. The Cambrian, Ordovician, and Silurian Periods together form the Lower Palaeozoic Sub-Era; the Devonian, Carboniferous, and Permian the Upper Palaeozoic Sub-Era. It was an era of great evolutionary change among plants, which began to invade the land at its beginning. By the end of the era, amphibians and reptiles were major components of various communities and giant tree-ferns, horsetails (Calamitaceae), and cycads gave rise to extensive forests. The faunas of the Palaeozoic are noted for the presence of many invertebrate organisms including trilobites, graptolites, brachiopods, cephalopods, and corals. The name is derived from palaeo- and the Greek zoe, meaning ‘life’.
Palaeozoic
Palaeozoic The first era of Phanerozoic time. It follows the Precambrian and is subdivided into the Lower Palaeozoic, comprising the Cambrian, Ordovician, and Silurian periods, and the Upper Palaeozoic, comprising the Devonian, Carboniferous, and Permian periods, It extended from about 590 million years ago to about 248 million years ago, when it was succeeded by the Mesozoic era.
Palaeozoic
Palaeozoic Second era of geological time, after the Precambrian era, lasting from 590 million to 248 million years ago. It is sub-divided into six periods: Cambrian, Ordovician, Silurian, Devonian, Carboniferous and Permian. Invertebrate animals evolved hard skeletons capable of being preserved as fossils in the Cambrian; fish-like vertebrates appeared in the Ordovician; amphibians emerged in the Devonian; and reptiles in the Carboniferous.
More From encyclopedia.com
Mesozoic Era , In geologic time , the Mesozoic Era, the second era in the Phanerozoic Eon , spans the time between roughly 250 million years ago (mya) and 65 mya.
T… Paleozoic Era , In geologic time , the Paleozoic Era, the first era in the Phanerozoic Eon , covers the time between roughly 544 million years ago (mya) and until 24… Era , era •Altamira, chimera, clearer, Elvira, era, hearer, Hera, hetaera, interferer, lempira, lira, lire, Madeira, Megaera, monstera, rangatira, rearer,… erathem , erathem The chronostratigraphic unit that is equivalent to the geologic-time unit era. An erathem comprises a number of systems grouped together and… Allosaurus , Jurassic Central period of the Mesozoic era, lasting from 213 to 144 million years ago. In this period there were saurischian and ornithischian dinos… Cretaceous , Cretaceous •factious, fractious •anxious • captious •precious, semi-precious •infectious •conscientious, contentious, licentious, pretentious, senten…
About this article
Paleozoic
All Sources -
You Might Also Like
NEARBY TERMS
Paleozoic