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单词 Lewisian
释义 Lewisian, a. Geol.|luːˈɪsɪən|
[f. Lewis, name of the northern section of the largest island of the Outer Hebrides + -ian.]
Of, pertaining to, or characteristic of Lewis: applied to the earlier of the two main groups of Pre-Cambrian rocks in NW. Scotland. Also absol., the Lewisian rocks or strata.
1859R. I. Murchison in Q. Jrnl. Geol. Soc. XVI. 240 If this most ancient gneiss required a British name, it might indeed with propriety be termed the ‘Lewisian System’, seeing that the large island of the Lewis is essentially composed of it..; but the term‘Laurentian’ having been already applied to rocks of this age in North America by our distinguished associate Sir W. Logan, I adhere to that name.1887,1911[see Hebridean a. and n.].1938A. K. Wells Outl. Hist. Geol. vi. 49 The dykes can be followed right up to the junction of the Lewisian with the Torridonian.1943Jrnl. R. Anthrop. Inst. LXXIII. 75/1 The inconceivably old Lewisian rocks of the north-west Highlands.1957G. E. Hutchinson Treat. Limnol. I. i. 57 Peach and Horne (1910) record many irregular basins formed in this way on the Lewisian gneiss of the western seaboard of Sutherland and Ross, and also in the Outer Hebrides.
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更新时间:2025/2/23 21:49:49