| 单词 | culm measures or series |
| 释义 | > as lemmasculm measures or series 3. Geology. (More fully culm measures or series.) A name given by some geologists to a series of shales, sandstones, etc. containing, in places, thin beds of impure anthracite, which represent the Carboniferous series in North Devon; also to strata supposed to be the analogues of these elsewhere.The Culm series is generally considered to be contemporary with the Carboniferous limestone, but is much less rich in marine remains. It is extensively developed along the borders of Austria, Poland, and Russia; and includes the calp of Ireland. ΘΚΠ the world > the earth > structure of the earth > age or period > stratigraphic units > [noun] > primary or Palaeozoic > carboniferous spec. millstone grit1682 tumbler-beds1821 culm measures or series1836 Mississippian1893 Pennsylvanian1902 1808 C. Vancouver Gen. View Agric. Devon i. 54 Some years since a vein of culm appearing near the surface on the parish of Chittlehampton.] 1836 Sedgwick & Murchison in Brit. Assoc. Rep. (1837) V. (title) A classification of..Rocks..of Devonshire..On the true position of the Culm Deposits. 1837 Sedgwick & Murchison Trans. Geol. Soc. 5 670 The base of the culm series. 1837 Sedgwick & Murchison Trans. Geol. Soc. (note) 5 670 The undoubted culm-measures. 1839 H. T. De la Beche Rep. Geol. Cornwall 124 Anthracite, or culm, occurs in a few beds, of very variable thickness, between Greenacliff..and..Chittlehampton..The culm itself seems the result of irregular accumulations of vegetable matter intermingled with mud and sand. 1882 A. Geikie Text-bk. Geol. vi. iv. §2. 748. < as lemmas |
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