Laurasian.

Brit.

/lɔːˈreɪʒə/,

/lɔːˈreɪʃə/, U.S.

/lɔˈreɪʒə/,

/lɔˈreɪʃə/

Etymology: modern Latin (R. Staub Der Bewegungsmech. der Erde (1928) ii. 121), < Laur(entia , name given to the ancient forerunner of North America (from the Laurentian strata of the Canadian Shield by which it is represented today) + Eur)asia (see Eurasian adj. 2a).

Geology.

A vast continental area or supercontinent thought to have once existed in the northern hemisphere and to have broken up in Mesozoic or late Palæozoic times forming North America, Greenland, Europe, and most of Asia north of the Himalayas. Also, these land masses collectively as they exist today.

ΘΚΠ

the world > the earth > land > land mass > continent > [noun] > specific

Lemuria1864

Gondwanaland1896

subcontinent1896

Fennoscandia1907

subcontinent1907

Pangaea1924

Laurasia1931

Euramerica1972

Gondwana-

1931 Trans. Geol. Soc. Glasgow 18 578 The long history of the Tethys girdling the continental shelf of the earth between Gondwanaland and Laurasia is a clear indication of the operation of some opposing force tending to pull the continents apart.

1937 A. L. Du Toit Our Wandering Continents ii. 24 Through..alternating ‘polar flight’ and ‘polar drift’ Laurasia and Gondwana have successively impinged upon or else parted from one another.

1944 A. Holmes Princ. Physical Geol. xvii. 367 The [earthquake] belts form two rings..: one enclosing North America and most of Asia and Europe (known collectively as Laurasia), and the other enclosing South America, Africa and Arabia, India, Australia, and Antarctica (known collectively as Gondwanaland).

1971 I. G. Gass et al. Understanding Earth xv. 229 Gondwanaland..probably formed about 500 million years ago, and Laurasia, west of the Urals, about 370 million years ago.

1974 Daily Tel. 10 Apr. (Colour Suppl.) 20/1 Whether Laurasia and Gondwanaland were themselves joined together into a supercontinent is a question still to be resolved.

Derivatives

Lauˈrasian adj.

ΘΚΠ

the world > the earth > land > land mass > continent > [adjective] > specific

lemurian1871

triarctic1883

Euramerican1959

Laurasian1962

1962 L. C. King Morphol. of Earth xii. 399 At the beginning of Cretaceous time virtually the whole of the vast continental interior had been reduced to a landscape of low relief—the Laurasian surface.

1973 Nature 1 June 278/2 The Atlantic and Indian Oceans originated from the break up of the Gondwanan and Laurasian continents.

This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2022).

单词	laurasia
释义	Laurasian. Brit. /lɔːˈreɪʒə/, /lɔːˈreɪʃə/, U.S. /lɔˈreɪʒə/, /lɔˈreɪʃə/ Etymology: modern Latin (R. Staub Der Bewegungsmech. der Erde (1928) ii. 121), < Laur(entia , name given to the ancient forerunner of North America (from the Laurentian strata of the Canadian Shield by which it is represented today) + Eur)asia (see Eurasian adj. 2a). Geology. A vast continental area or supercontinent thought to have once existed in the northern hemisphere and to have broken up in Mesozoic or late Palæozoic times forming North America, Greenland, Europe, and most of Asia north of the Himalayas. Also, these land masses collectively as they exist today. ΘΚΠ the world > the earth > land > land mass > continent > [noun] > specific Lemuria1864 Gondwanaland1896 subcontinent1896 Fennoscandia1907 subcontinent1907 Pangaea1924 Laurasia1931 Euramerica1972 Gondwana- 1931 Trans. Geol. Soc. Glasgow 18 578 The long history of the Tethys girdling the continental shelf of the earth between Gondwanaland and Laurasia is a clear indication of the operation of some opposing force tending to pull the continents apart. 1937 A. L. Du Toit Our Wandering Continents ii. 24 Through..alternating ‘polar flight’ and ‘polar drift’ Laurasia and Gondwana have successively impinged upon or else parted from one another. 1944 A. Holmes Princ. Physical Geol. xvii. 367 The [earthquake] belts form two rings..: one enclosing North America and most of Asia and Europe (known collectively as Laurasia), and the other enclosing South America, Africa and Arabia, India, Australia, and Antarctica (known collectively as Gondwanaland). 1971 I. G. Gass et al. Understanding Earth xv. 229 Gondwanaland..probably formed about 500 million years ago, and Laurasia, west of the Urals, about 370 million years ago. 1974 Daily Tel. 10 Apr. (Colour Suppl.) 20/1 Whether Laurasia and Gondwanaland were themselves joined together into a supercontinent is a question still to be resolved. Derivatives Lauˈrasian adj. ΘΚΠ the world > the earth > land > land mass > continent > [adjective] > specific lemurian1871 triarctic1883 Euramerican1959 Laurasian1962 1962 L. C. King Morphol. of Earth xii. 399 At the beginning of Cretaceous time virtually the whole of the vast continental interior had been reduced to a landscape of low relief—the Laurasian surface. 1973 Nature 1 June 278/2 The Atlantic and Indian Oceans originated from the break up of the Gondwanan and Laurasian continents. This entry has not yet been fully updated (first published 1976; most recently modified version published online March 2022). < n.1931
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