| 释义 |
Skiddavian, a. Geol.|skɪˈdeɪvɪən|
[f. Skiddav-, stem of latinized form of next + -ian.]
= Skiddaw b. Also absol.
1905J. E. Marr in Q. Jrnl. Geol. Soc. LXI. p. lxxxi, The time-divisions which I would..propose to adopt for the rocks of this [Ordovician] system are as follows:—Ashgillian. Caradocian. Llandeilian. Skiddavian. Ibid. p. lxxxii, The beds tabulated above may..be taken as defining the upper and lower limits of the Skiddavian Series. Ibid. p. lxxxiii, Didymograptus bifidus..belongs to the top of the Skiddavian. 1929W. W. Watts in Evans & Stubblefield Handbk. Geol. Brit. Isles 63 The Skiddavian fauna includes many species of Didymograptus. Ibid., The Manx Slates of the Isle of Man are probably in part of Skiddavian age. 1955G. G. Woodford tr. Gignoux's Stratigr. Geol. iii. 83 (caption) Upper Skiddavian: shales and sandstones of the upper Arenig. Lower Skiddavian: basal sandstone of the Arenig. |