The Cretaceous period got its name from the type of rock that was deposited along the northern shores of the Tethys seas at this periods time. This rock, formed from the metamorphosed deposits of the tiny limestone GH.LGUJLG of algae known as diatoms,is known as chalk.
The Ordovician lasted for 47 million years from 490 to 443 Million Years Ago.
During the Ordovician period, the supercontinent Gondwana was the largest landmass on Earth. Gondwana included parts of present-day Africa, South America, Antarctica, Australia, and the Indian subcontinent.
The Ordovician period came first. It started 485.4 million years ago and finished 443.8 million years ago. Then came the Silurian and Devonian periods, followed at 358.9 million years ago by the Carboniferous.
there was plate tectonic movement
The Ordovician period was characterized by a warmer climate overall, with high sea levels and a wide distribution of shallow tropical seas. The climate was relatively stable during this time, with no polar ice caps, leading to a more uniform global temperature. However, there were still fluctuations in temperature and sea levels throughout the period.
The Ordovician period came after the Cambrian period.
The Silurian period followed the Ordovician period.
The Ordovician period follows the extinction at the end of the Cambrian period.
470 million years ago was in the Ordovician Period (488.3 - 443.7 Ma).Phanerozoic Eon (542 Ma - Now)Paleozoic Era (542 - 251Ma)Ordovician Period (488.3 - 443.7Ma)Middle Ordovician Epoch (471.8 - 460.9Ma)Dapingian Age (471.8 - 468.1Ma)
Ordovician Period
copper
Ordovician period
Ordovician Period
The Ordovician lasted for 47 million years from 490 to 443 Million Years Ago.
Algae was the dominant plant of the Ordovician. There were little to no other plants (other then algae) during the Ordovician. In the Ordovician, the common types of algae were Stromatolites (Blue green algae), and Tetradium (Red algae).
490 million years ago.
The Ordovician period and the Silurian period