lutiten.
/ˈlʌtʌɪt/ Geology.
= pelite n.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [noun] > other argillaceous
tough-stonea1641
waxen vein1681
mudstone1736
marlstone1766
marlite1794
pelite1879
lutite1904
1904 A. W. Grabau in Amer. Geologist 33 242 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.
1941 F. 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.
1959 W. 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.
1970 Nature 14 Mar. 1068/2 A sediment core..reveals the top 20 cm to be a greyish-brown fossiliferous lutite.
Derivatives
luˈtaceous adj. [-aceous suffix] = pelitic adj.
ΘΚΠ
the world > the earth > structure of the earth > constituent materials > rock > sedimentary rock > [adjective] > other argillaceous
pelitic1879
lutaceous1904
1904Lutaceous [see main sense]. 1959Lutaceous [see main sense].
This entry has not yet been fully updated (first published 1976; most recently modified version published online December 2020).
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n.1904