| 释义 |
Santonian, a. Geol.|sænˈtəʊnɪən|
[ad. F. Santonien (H. Coquand 1857, in Bull. de la Soc. géol. de France XIV. 749) f. Santon, native or characteristic of Saintes, a town in Charente-Maritime Dept. (f. L. Santoni or Santones, ancient name of a people of Aquitania), + -ien -ian.]
Name of a stage in the Upper Cretaceous in France and adjacent areas, corresponding to the middle Senonian and to part of the Upper Chalk in Britain; of or pertaining to this stage and to the strata which characterize it, or the geological age during which it was deposited. Freq. absol.
1869H. Coquand in Q. Jrnl. Geol. Soc. XXV. 239, I have divided the Cretaceous formation of the south-west [of France] in the following manner..Santonian stage (of Saintes). 1885A. Geikie Text-bk. Geol. (ed. 2) 833 This stage [sc. the Senonian]..consists mainly of white chalk separable into the two divisions of: 1st, Micraster (Santonian) sub-stage composed of chalk beds [etc.]. 1924C. Schuchert Text-bk. Geol. (ed. 2) II. xxxviii. 537 Upper Cretaceous [of Europe]... Senonian... Santonian. 1971Nature 18 June 439/2 Misfit motion in the African plate closed this rift in Santonian time. 1974Encycl. Brit. Micropædia VIII. 886/2 In northern Europe the Santonian is represented by the Granulaten Chalk, the equivalent of portions of the Upper Chalk in Great Britain. |