Laurasia (lôrāzh`ə): see continental drift continental drift, geological theory that the relative positions of the continents on the earth's surface have changed considerably through geologic time. Though first proposed by American geologist Frank Bursley Taylor in a lecture in 1908, the first detailed theory
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Laurasia

Hypothetical former supercontinent in the Southern Hemisphere, which included modern North America, Europe, and Asia (except peninsular India). The concept that the continents were at one time joined was first set forth in detail by Alfred Wegener in 1912. He envisioned a single great landmass, Pangea, which supposedly began to separate early in the Jurassic Period (approximately 200 million to 146 million years ago). Subsequent research distinguished between a northern landmass, Laurasia, and Gondwana. Laurasia is thought to have fragmented into the present continents largely during the end of the Cretaceous Period and the beginning of the Paleogene Period. See also continental drift.

Laurasia

one of the two ancient supercontinents produced by the first split of the even larger supercontinent Pangaea about 200 million years ago, comprising what are now North America, Greenland, Europe, and Asia (excluding India)

Laurasia (redirected from Laurasian)

Laurasia

Laurasia
(redirected from Laurasian)