Laurasia

(redirected from Laurasian)
Also found in: Dictionary, Thesaurus, Medical.

Laurasia

(lôrāzh`ə): see continental driftcontinental 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 of
..... Click the link for more information.
.

Laurasia

 

(from “Laurentian Shield,” the former name of the Canadian Shield, and “Asia”), the ancient continent that included the North American, Eastern European, and Siberian platforms, and possibly the Chinese-Korean and South Chinese platforms as well as the Caledonian and Hercynian folded structures located between them. The unification of the North American and Eastern European platforms into a single land mass occurred at the beginning of the Devonian across the area now occupied by the northern part of the Atlantic Ocean. The other parts of Laurasia became joined together by the end of the Paleozoic. The breakup of Laurasia and the formation of the basin of the North Atlantic began in the middle of the Mesozoic.

Laurasia

[lȯ′rā·zhə]
(geology)
A continent theorized to have existed in the Northern Hemisphere; supposedly it broke up to form the present northern continents about the end of the Pennsylvanian period.

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)
References in periodicals archive ?
The biogeographic legacy The Laurasian collision of the Asian and Australian plates coincided with the Pliocene and Pleistocene interface, and formed the Wallace Line.
that the Laurasian and African Plate vermileonid faunas were separated for at least the entire duration of the Cretaceous Period, because the Tethys Sea lay between them throughout that long interval' (Stuckenberg 2000b: 199).
2002) proposed a similar migration from South America to the Old World via a Laurasian migration route for Malpighiaceae, another primarily tropical group.
Nyssa talamancana (Cornaceae): an addition to the remnant Laurasian Tertiary flora of southern Central America.