| 释义 |
Washita|ˈwɒʃɪtɔː|
The name Washita (see below) used attrib. and absol. to designate: a. [Fort Washita, Oklahoma.] (The rocks of) a subdivision of the Cretaceous in the central-southern U.S.A. b. [Ouachita or Washita Mountains, Arkansas.] A porous variety of novaculite used for sharpening cutting tools.
1860Trans. Acad. Sci. St. Louis I. 586 Washita limestone.—This important member of our Cretaceous System is made up of a nearly white, yellow, gray and blue limestone. 1885[see Arkansas1]. 1963A. Geikie Text-bk. Geol. (ed. 4) II. vi. iii. 1212 The Texas Lower Cretaceous deposits..have been divided into three formations... The highest formation, termed the Washita, consists of four groups.
1938A. Durst Wood Carving 18 The largest stone shown is the Washita oilstone; the others are various slips for the smaller tools. 1958J. R. Biggs Woodcuts 32 The knife should be kept sharp on the India or Washita stone. 1974Encycl. Brit. Micropædia X. 562/2 The Washita Group is the uppermost member of the Comanche Series. |
