| 释义 |
Kimmeridgian, a. (n.) Geol.
Also Kimeridgian.
[ad. F. kimméridgien (A. d'Orbigny Paléont. francaise. Terrains Jurassiques (1842–9) I. 610), replacing earlier kimméridien (J. Thurmann Essai sur les Soulèvemens jur. du Porrentruy (1832) i. 11).]
The specific epithet of that subdivision of the Upper Oolite which is prominent at Kimmeridge. Hence, of or pertaining to this subdivision (which is a stage of the Upper Jurassic next below the Portlandian). Also absol.
1851Q. Jrnl. Geol. Soc. VII. ii. 75 The characteristic condition of most of the Jurassic formations (Sequanian, Kimmeridgian, and Portlandian). 1863Dana Man. Geol. 449 The British subdivisions are for the most part recognized in France..in the Oolite—1, Bajocian..6, Kimmeridgian. 1931Gregory & Barrett Gen. Stratigr. x. 155 In places the Kimeridgian becomes sandy towards the top before passing into the Portlandian. 1967D. H. Rayner Stratigr. Brit. Isles ix. 303 The onset of marine muds at the beginning of Kimeridgian times brought in a period of exceptionally uniform sedimentation in the Jurassic shelf seas of Great Britain. 1969Proc. Geol. Soc. London Aug. 153 It is recommended that the beginning/base of the Age-Standard Stage Kimmeridgian be taken at the base of the Baylei Chronozone at the bottom of bed 26 of Arkell (1947) in Ringstead Bay, Dorset, England. |