Panthalassan.

Brit.

/ˌpanθəˈlasə/, U.S.

/ˌpænθəˈlæsə/

Forms: also with lower-case initial.

Origin: A borrowing from Greek, combined with an English element. Etymons: pan- comb. form, Greek θάλασσα.

Etymology: < pan- comb. form + ancient Greek θάλασσα sea (see thalasso- comb. form). Compare Pangaea n.

Geology.

(The name of) a worldwide ocean, such as would have surrounded the supercontinent of Pangaea.

ΘΚΠ

the world > the earth > water > sea or ocean > [noun] > ocean, open sea, or deep sea > proto-ocean

Panthalassa1893

proto-ocean1973

1893 E. Suess in Nat. Sci. 2 186 We might..rather be induced to infer that in Prepalæozoic times there may have existed a universal hydrosphere or panthalassa covering the whole of the planet.

1924 J. G. A. Skerl tr. A. Wegener Orig. Continents & Oceans x. 149 In the most ancient ‘pre-geological times’ the film of sial..could then have been..only about 30 km. thick, and have been covered with a ‘Panthalassa’..which probably left exposed only small proportions, or none at all, of the earth's surface.

1970 R. S. Dietz in H. Johnson & B. L. Smith Megatectonics Continents & Oceans iii. 36 (caption) Accretionary development of two supercontinents (Laurasia and Gondwana)..surrounded by the equatorial universal ocean of Panthalassa.

1992 New Scientist 25 Jan. 51/2 On the opposite side of the globe, the vast Panthalassa Ocean stretched 220° around the world.

2000 R. Kunzig Mapping Deep v. 81 The Pacific..is a remnant of Panthalassa, the global ocean that surrounded the supercontinent Pangaea until about 170 million years ago.

This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022).

单词	panthalassa
释义	Panthalassan. Brit. /ˌpanθəˈlasə/, U.S. /ˌpænθəˈlæsə/ Forms: also with lower-case initial. Origin: A borrowing from Greek, combined with an English element. Etymons: pan- comb. form, Greek θάλασσα. Etymology: < pan- comb. form + ancient Greek θάλασσα sea (see thalasso- comb. form). Compare Pangaea n. Geology. (The name of) a worldwide ocean, such as would have surrounded the supercontinent of Pangaea. ΘΚΠ the world > the earth > water > sea or ocean > [noun] > ocean, open sea, or deep sea > proto-ocean Panthalassa1893 proto-ocean1973 1893 E. Suess in Nat. Sci. 2 186 We might..rather be induced to infer that in Prepalæozoic times there may have existed a universal hydrosphere or panthalassa covering the whole of the planet. 1924 J. G. A. Skerl tr. A. Wegener Orig. Continents & Oceans x. 149 In the most ancient ‘pre-geological times’ the film of sial..could then have been..only about 30 km. thick, and have been covered with a ‘Panthalassa’..which probably left exposed only small proportions, or none at all, of the earth's surface. 1970 R. S. Dietz in H. Johnson & B. L. Smith Megatectonics Continents & Oceans iii. 36 (caption) Accretionary development of two supercontinents (Laurasia and Gondwana)..surrounded by the equatorial universal ocean of Panthalassa. 1992 New Scientist 25 Jan. 51/2 On the opposite side of the globe, the vast Panthalassa Ocean stretched 220° around the world. 2000 R. Kunzig Mapping Deep v. 81 The Pacific..is a remnant of Panthalassa, the global ocean that surrounded the supercontinent Pangaea until about 170 million years ago. This entry has been updated (OED Third Edition, March 2005; most recently modified version published online March 2022). < n.1893
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