Keewatinn.

/kiːˈweɪtɪn/

Etymology: < Keewatin, the name of a district in the Northwest Territories, Canada.

Geology.

Used attributively and absol. to denote the oldest division of the Archaean in North America and rocks representing it, found in the Canadian Shield region.

ΘΚΠ

the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > pre-Cambrian formations

Huronian1857

Labradorian1870

Keweenawan1876

sparagmite1882

Keewatin1886

Torridonian1893

Laxfordian1950

the world > the earth > structure of the earth > age or period > [noun] > Pre-Cambrian > Proterozoic > specific

Keweenawan1876

Keewatin1886

1886 A. C. Lawson in Ann. Rep. Geol. Surv. Canada 1885 I. 14 cc The most appropriate name for the series that suggests itself to me is ‘Keewatin’, the Indian name for the North-west, or the North-west wind, which has been applied to the district within which the rocks occur.

1886 A. C. Lawson in Ann. Rep. Geol. Surv. Canada 1885 I. 19 cc The contact of the Laurentian gneiss and the Keewatin schists.

1906 T. C. Chamberlin & R. D. Salisbury Geol. III. 330 The extension of the Kewatin ice-sheet to the southward.

1913 F. D. Adams Probl. Canad. Shield (1915) 59 The widely extended Keewatin series.

1925 Bull. Geol. Soc. Amer. 36 363 The Coutchiching beds pass down under the Keewatin.

1927 Jrnl. Geol. (Chicago) 35 143 At present the general use of the term Keewatin in the United States and Canada is as the name of the oldest rock series of the region.

1927 Jrnl. Geol. (Chicago) 35 143 The view that the Keewatin rocks are the oldest in Canada is moreover inconsistent with much recent geological work.

1970 J. A. Dorr & D. F. Eschman Geol. Michigan iv. 39/1 Nearly 3·5 billion years ago, during Keewatin time, streams from bordering highlands deposited sediments and lavas poured out on the surface of the earth in what is now the Upper Peninsula of Michigan.

1972 L. W. Mintz Hist. Geol. xiii. 388 Keewatin rocks, like all other very old sediments, appear to be oceanic in origin and consist chiefly of metamorphosed lavas and turbidites.

This entry has not yet been fully updated (first published 1933; most recently modified version published online September 2018).

单词	keewatin
释义	Keewatinn. /kiːˈweɪtɪn/ Etymology: < Keewatin, the name of a district in the Northwest Territories, Canada. Geology. Used attributively and absol. to denote the oldest division of the Archaean in North America and rocks representing it, found in the Canadian Shield region. ΘΚΠ the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > pre-Cambrian formations Huronian1857 Labradorian1870 Keweenawan1876 sparagmite1882 Keewatin1886 Torridonian1893 Laxfordian1950 the world > the earth > structure of the earth > age or period > [noun] > Pre-Cambrian > Proterozoic > specific Keweenawan1876 Keewatin1886 1886 A. C. Lawson in Ann. Rep. Geol. Surv. Canada 1885 I. 14 cc The most appropriate name for the series that suggests itself to me is ‘Keewatin’, the Indian name for the North-west, or the North-west wind, which has been applied to the district within which the rocks occur. 1886 A. C. Lawson in Ann. Rep. Geol. Surv. Canada 1885 I. 19 cc The contact of the Laurentian gneiss and the Keewatin schists. 1906 T. C. Chamberlin & R. D. Salisbury Geol. III. 330 The extension of the Kewatin ice-sheet to the southward. 1913 F. D. Adams Probl. Canad. Shield (1915) 59 The widely extended Keewatin series. 1925 Bull. Geol. Soc. Amer. 36 363 The Coutchiching beds pass down under the Keewatin. 1927 Jrnl. Geol. (Chicago) 35 143 At present the general use of the term Keewatin in the United States and Canada is as the name of the oldest rock series of the region. 1927 Jrnl. Geol. (Chicago) 35 143 The view that the Keewatin rocks are the oldest in Canada is moreover inconsistent with much recent geological work. 1970 J. A. Dorr & D. F. Eschman Geol. Michigan iv. 39/1 Nearly 3·5 billion years ago, during Keewatin time, streams from bordering highlands deposited sediments and lavas poured out on the surface of the earth in what is now the Upper Peninsula of Michigan. 1972 L. W. Mintz Hist. Geol. xiii. 388 Keewatin rocks, like all other very old sediments, appear to be oceanic in origin and consist chiefly of metamorphosed lavas and turbidites. This entry has not yet been fully updated (first published 1933; most recently modified version published online September 2018). < n.1886
随便看	θ58152 θ58153 θ58154 θ58155 θ58156 θ58157 θ58158 θ58159 θ5816 θ58160 θ58161 θ58162 θ58163 θ58164 θ58165 θ58166 θ58167 θ58168 θ58169 θ5817 θ58170 θ58171 θ58172 θ58173 θ58174