Laurasia


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Related to Laurasia: Panthalassa

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
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.

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 ?
ART: Have students research plate tectonics and learn about Pangaea, Gondwana, and Laurasia, as well as the current movement of Earth's plates.
Geobotanists think the origin of the ginseng plant goes back tens of millions of years, to when the Northern Hemisphere's paleocontinent Laurasia broke apart to form northern Asia and North America, thereby separating what had once been a single ecological zone.
La primera fractura dio origen a dos supercontinentes, uno denominado Laurasia y el otro Gondwana, separados por el mar de Thetys.
It will take you back millions of years from the time about 500m years ago when Britain was further south of the Equator than it is north of it now, to the carboniferous period 327-300m years ago when the rocks of the Pennines (coal measures, millstone grit and carboniferous limestone) were formed, with Britain on the edge of the huge Laurasia continent and near the Equator on its long voyage north.
The Moldanubian Zone is a part of the Variscan orogenic belt, which resulted from the collision of Laurasia and Gondwana, and several small microplates between these, in the Devonian to Carboniferous times (Matte 1986).
Look straight ahead to the footpath sign next to Laurasia House and follow the path through a kissing gate into a meadow.
De acuerdo con Florin (citado por Leppik, 1973) las coniferas tuvieron su origen en regiones subtropicales y climas calidos; sus fosiles mas primitivos se han encontrado en la epoca tardia del Carbonifero y del Permico temprano; para la constitucion de los supercontinentes de Laurasia (Norte) y Gondwanalandia (Sur), las coniferas se encontraban bien establecidas y sus familias estaban diferenciadas.
After the repeated fragmentation of continents, Laurasia and Gondwana, the different continents and islands separated, and their floras and faunas evolved independently.
The more persuasive geological arguments to which I tentatively subscribe contend that over the past 500 million years continental landmasses have brecciated from a single continent of Pangaea, splitting into Gondwana and Laurasia, fragmenting again and again, and ultimately reforming into the continents we recognize today.
BY THIS time the Earth's continents Laurasia and Gondwana were on the move and a new sea was gradually forming between them.
The world before our world - the land called Pangaea - has started to break up and two distinct land masses, Laurasia to the north and Gondwana to the south, are taking shape.
Es un hecho comprobado, por ejemplo, que las primeras especies de pinos aparecieron en los campos de lava de lo que ahora es el territorio nacional durante la era Mesozoica --hace unos 200 millones de anos--, cuando todavia formaba parte del supercontinente de Laurasia, que al fragmentarse dio origen a Norteamerica y Eurasia.