| 单词 |
rudite |
| 释义 |
rudite Geol.|ˈruːdaɪt|
Also rudyte.
[f. L. rūd-us broken stone, rubble + -ite1.]
Any consolidated breccia or conglomerate consisting of particles larger than sand grains; = psephite.
1904A. W. Grabau in Amer. Geologist XXXIII. 242 The consolidated rock whether conglomerate or breccia may be called a rudyte. 1920― Gen. Geol. xviii. 569 Three textural types of rock may be recognized: (1) the rubble-rock or rubble-stone, or rudyte, which when the fragments are rounded is a conglomerate and when angular a breccia; (2) the sand-rock or sandstone or arenyte; and (3) the mud-rock or mud-stone or lutyte. 1935Bull. Nat. Res. Council (U.S.) XCVIII. 239 Rudite. This is a general term..for fragmental sedimentary rocks coarser than sand grains. 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)..and lutytes (lutaceous). 1966B. Simpson Rocks & Minerals xvii. 174 The quartz-rich rudites are quartz conglomerates and quartz breccias. 1971I. G. Gass et al. Understanding Earth i. 31/1 The rudites are represented by such rock types as conglomerate. |
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