| 释义 |
Namurian, a. (n.) Geol.|næˈm(j)uːrɪən|
[f. Namur, name of a town and province of southern Belgium + -ian.]
Of, pertaining to, or designating the lowest stage of the Upper Carboniferous in western Europe, lying above the Dinantian; also as n., the Namurian stage or epoch.
1915C. Schuchert Text-bk. Geol. II. xl. 729 Kayser adds a third series, the Namurian (Namur, Belgium), which is referred to the base of the Middle Carboniferous. 1931Gregory & Barrett Gen. Stratigr. vii. 118 Above the Dinantian [in Belgium] is a coarse sandstone, the great Grès d'Ardenne, corresponding to the Millstone Grit; it is called the Namurian. 1938A. K. Wells Outl. Hist. Geol. 100 The normal facies of the Namurian Stage is deltaic. 1963D. W. & E. E. Humphries tr. Termier's Erosion & Sedimentation xiii. 292 By the Namurian, subsidence had practically finished and the last reef phase passed into large biostromes. 1967D. H. Rayner Stratigr. Brit. Isles vii. 200 It is also the type area of the Millstone Grit, where millstones were once fashioned out of the coarser sandstones... The sandstones..probably represent a lesser proportion of Namurian time than their thickness at first sight suggests. |