| 释义 |
lutite Geol.|ˈlʌtaɪt|
Formerly also -yte.
[f. L. lut-um mud + -ite1 2 b.]
= pelite. So luˈtaceous a. [-aceous] = pelitic a.
1904A. W. Grabau in Amer. Geologist XXXIII. 242 The third texture [sc. that of ‘rock flour or impalpable powder’], finally, may be designated by the term lutaceous, (from lutum, mud), and for consolidated rocks of this type the term lutyte may be used, irrespective of chemical composition. Pelyte has been used particularly for argillaceous rocks of the group. 1941F. H. Lahee Field Geol. (ed. 4) 785 These terms [sc. psephite, psammite, pelite] are derived from the Greek. The equivalent terms, derived from the Latin and preferred by some geologists, are rudite.., arenite.., and lutite. 1959W. W. Moorhouse Study of Rocks in Thin Section xviii. 334 The clastic sediments are classified according to size as rudytes (rudaceous), which are conglomerates, arenytes (arenaceous) which are sands, and lutytes (lutaceous), which are shales and muds. 1970Nature 14 Mar. 1068/2 A sediment core..reveals the top 20 cm to be a greyish-brown fossiliferous lutite. |