ordovician

listen to the pronunciation of ordovician
English - Turkish
ordovizyen
Ordovisyen
paleozoyik zamanın 510-439 my aralığını kapsayan devri
English - English
Of a geologic period within the Paleozoic era; comprises lower, middle and upper epochs from about 488 to 443 million years ago
The Ordovician period
{s} pertaining to the second period in the Paleozoic era which is characterized by the presence of algae and seaweeds (Geology)
Of or pertaining to a division of the Silurian formation, corresponding in general to the Lower Silurian of most authors, exclusive of the Cambrian
The Ordovician formation
from 500 million to 425 million years ago; conodonts and ostracods and algae and seaweeds
ordovian

Related Terms

Ordovician Period
Interval of geologic time, 490-443 million years ago, the second oldest period of the Paleozoic Era. It follows the Cambrian and precedes the Silurian. During the Ordovician, many of the landmasses were aligned in the tropics. Life was dominated by marine invertebrates, but some forms of land plants may have appeared during the middle of the period. Spores suggesting a tropical terrestrial environment have been found in rocks of that age