Torridonianadj.

/tɒrɪˈdəʊnɪən/

Etymology: < Torridon n. + -ian suffix.

Geology.

Of, pertaining to, or designating the later of the two main series of Pre-Cambrian rocks in NW. Scotland, which occur in a narrow belt running from Cape Wrath to Skye and consist chiefly of sandstones, grits, and shales; also the time of their deposition. Also absol., the Torridonian series.

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 > stratigraphic units > [adjective] > pre-Cambrian > specific

Huronian1854

Lewisian1859

Archaean1872

Torridon1873

Keweenawan1876

Pebidian1877

Malvernian1879

Longmyndian1887

Torridonian1893

Moinian1938

Laxfordian1950

1893 A. Geikie Text-bk. Geol. (ed. 3) 699 (table) Torridonian, dull red sandstones, shales and conglomerates attaining a thickness of at least 8000 or 10,000 feet.

1896 J. W. Judd Student's Lyell xxviii. 435/2 The Cambrian strata being found lying on every portion of the Torridonian series.

1902 Encycl. Brit. XXVIII. 655/2 This sedimentary accumulation is known as Torridonian from its large development in the district around Loch Torridon.

1930 B. N. Peach & J. Horne Chapters Geol. Scotl. 46 The old Archæan floor on which the Torridonian and Cambrian strata were deposited.

1938 A. K. Wells Outl. Hist. Geol. vi. 50 There is nothing inherently impossible in the suggestion that the Moinian rocks may be metamorphosed Torridonian.

1952 Geol. Mag. 89 70 The possibility of a Torridonian age for this very isolated outlier should not be excluded.

1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles iii. 46 Resting with marked unconformity upon the Lewisian of the foreland is the Torridonian Series, an enormous thickness of dominantly arenaceous rocks.

1971 Country Life 18 Nov. 1349/3 The fertile oolite soil gives way to Torridonian sandstone just north of James Gillie's croft.

1976 T. R. Owen Geol. Evol. Brit. Isles ii. 19 Radiometric datings (1000–800 m.y.) now confirm that the Torridonian and the Moine are the lateral equivalents of one another.

This entry has not yet been fully updated (first published 1986; most recently modified version published online September 2018).

单词	torridonian
释义	Torridonianadj. /tɒrɪˈdəʊnɪən/ Etymology: < Torridon n. + -ian suffix. Geology. Of, pertaining to, or designating the later of the two main series of Pre-Cambrian rocks in NW. Scotland, which occur in a narrow belt running from Cape Wrath to Skye and consist chiefly of sandstones, grits, and shales; also the time of their deposition. Also absol., the Torridonian series. 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 > stratigraphic units > [adjective] > pre-Cambrian > specific Huronian1854 Lewisian1859 Archaean1872 Torridon1873 Keweenawan1876 Pebidian1877 Malvernian1879 Longmyndian1887 Torridonian1893 Moinian1938 Laxfordian1950 1893 A. Geikie Text-bk. Geol. (ed. 3) 699 (table) Torridonian, dull red sandstones, shales and conglomerates attaining a thickness of at least 8000 or 10,000 feet. 1896 J. W. Judd Student's Lyell xxviii. 435/2 The Cambrian strata being found lying on every portion of the Torridonian series. 1902 Encycl. Brit. XXVIII. 655/2 This sedimentary accumulation is known as Torridonian from its large development in the district around Loch Torridon. 1930 B. N. Peach & J. Horne Chapters Geol. Scotl. 46 The old Archæan floor on which the Torridonian and Cambrian strata were deposited. 1938 A. K. Wells Outl. Hist. Geol. vi. 50 There is nothing inherently impossible in the suggestion that the Moinian rocks may be metamorphosed Torridonian. 1952 Geol. Mag. 89 70 The possibility of a Torridonian age for this very isolated outlier should not be excluded. 1969 G. M. Bennison & A. E. Wright Geol. Hist. Brit. Isles iii. 46 Resting with marked unconformity upon the Lewisian of the foreland is the Torridonian Series, an enormous thickness of dominantly arenaceous rocks. 1971 Country Life 18 Nov. 1349/3 The fertile oolite soil gives way to Torridonian sandstone just north of James Gillie's croft. 1976 T. R. Owen Geol. Evol. Brit. Isles ii. 19 Radiometric datings (1000–800 m.y.) now confirm that the Torridonian and the Moine are the lateral equivalents of one another. This entry has not yet been fully updated (first published 1986; most recently modified version published online September 2018). < adj.1893
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