Ordovician - Wikipedia The Ordovician received international approval in 1960 (forty years after Lapworth's death), when it was adopted as an official period of the Paleozoic Era by the International Geological Congress
Ordovician Period | Major Events, Extinction, Facts | Britannica Ordovician Period, in geologic time, the second period of the Paleozoic Era It began 485 4 million years ago, following the Cambrian Period, and ended 443 8 million years ago, when the Silurian Period began
The Ordovician Period The Ordovician Period lasted almost 45 million years, beginning 488 3 million years ago and ending 443 7 million years ago * During this period, the area north of the tropics was almost entirely ocean, and most of the world's land was collected into the southern supercontinent Gondwana
Ordovician - New World Encyclopedia The Ordovician, named after the Welsh tribe of the Ordovices, was defined by Charles Lapworth, in 1879, to resolve a dispute between followers of Adam Sedgwick and Roderick Murchison, who were placing the same rock beds in northern Wales into the Cambrian and Silurian periods, respectively
Prehistoric Life During the Ordovician Period - ThoughtCo The Ordovician is the second period of the Paleozoic Era (542-250 million years ago), preceded by the Cambrian and succeeded by the Silurian, Devonian, Carboniferous and Permian periods
Ordovician Period - Fossilicious The Ordovician Period (≈ 485–444 Ma) follows the Cambrian Explosion and marks a time of unparalleled diversification in the seas Trilobites, brachiopods, corals, and the first vertebrates flourished, setting the stage for complex ecosystems
Ordovician Period | Natural History Museum The Ordovician* lasted about 45 million years and saw the transition from very primitive to relatively modern life-forms in the seas
Ordovician Period Information and Facts - National Geographic During the Ordovician period, part of the Paleozoic era, a rich variety of marine life flourished in the vast seas and the first primitive plants began to appear on land—before the second largest
Ordovician - an overview | ScienceDirect Topics The Ordovician is defined as a geological period that lasted from 495 million years ago to 443 million years ago, following the Cambrian and preceding the Silurian, characterized by the development of diverse marine ecosystems and significant evolutionary radiations of various animal groups