| 释义 |
slickenside|ˈslɪk(ə)nsaɪd|
Also -sides.
[f. dial. slicken, var. of slick a. + side n.1]
1. Min. A specular variety of galena found in Derbyshire.
1768Mettam in Whitehurst Formation of Earth (1778) 188, I send you, by the bearer, two specimens of our slickensides, containing all the variety of minerals where the explosions happen. 1789J. Pilkington Derbyshire I. 195 Slickenside with a smooth surface on each side... The crackling and explosions caused by scraping these slickensides with a pick-ax are well known. 1810Millar J. Williams' Min. Kingdom II. App. 448 Slickenside, which is a variety of galena, or sulphuret of lead, is also a product of these [Derbyshire] mines. 1850Ansted Elem. Geol., Min. etc. Gloss., Slickensides,..one of the ores of lead found in Derbyshire.
2. Geol. A polished (and sometimes striated) surface on the wall of a mineral lode, or on a line of fracture in a rock-mass; a smooth glistening surface produced by pressure and friction.
1822Conybeare & Phillips Geol. Eng. & Wales 401 These planes, when separated, are the slickensides of the mineralogist. 1859R. Hunt Guide Mus. Pract. Geol. (ed. 2) 164 The Slickensides evidently point to some sliding or grinding motion in the mass constituting the lode. 1880Nature XXI. 459 A kind of universal slickenside, consequent upon the crushing of a rock consisting of thin laminæ of different texture.
attrib.1839Murchison Silur. Syst. i. xxxiv. 462 The direction of these joints (many of which have slickenside surfaces). 1884Nature 13 Nov. 35 Parallel with the slickenside-lines. 1888Prestwich Geol. II. 134 Extreme lateral pressure, the result of which is the formation of slickenside surfaces, often strongly striated.
Hence ˈslickensided ppl. a. and pa. pple.; ˈslickensiding vbl. n.
1875Dawson Dawn of Life ii. 32 This graphite is composed of contorted and slickensided laminæ. 1883Science I. 191/2 A roof of slickensided ‘soapstone’. 1884Geol. Mag. 553 The dissolution being unequal, caused bosses to be left standing up, which were then ‘slickensided’ by the downward movement of the chalk. Ibid. 552 This movement would be..amply sufficient to account for the slickensiding observed. |