| 单词 | lingula grit |
| 释义 | > as lemmasLingula grit C1. attributive (in sense 4) designating geological deposits characterized by abundant fossils of Lingula or other lingulate brachiopods, as Lingula bed, Lingula grit, Lingula slate. ΚΠ 1847 A. Sedgwick in Q. Jrnl. Geol. Soc. 3 i. 144 The beds of Moel Wyn and Cynicht..are above the Lingula beds of Festiniog. 1852 D. D. Owen Rep. Geol. Surv. Wisconsin, Iowa & Minnesota 50 The geologists of our own country had set down the Lingula beds of the New York Potsdam Sandstone as the oldest fossiliferous rocks in the United States. 1863 Q. Jrnl. Geol. Soc. 19 274 I had landed..in a parallel creek a mile to the westward, at the junction of the red and purple Cambrian grits with the Lingula-slates. 1958 Jrnl. Ecol. 46 573 The rock is Ordovician shale overlying Lingula grits. 2002 Jrnl. Crustacean Biol. 22 939/1 The specimens..are preserved in yellow-gray, massive, bioturbated siltstone, which is the basal unit of a fining-upward sequence that terminates in a Lingula bed. < as lemmas |
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