| 单词 | picritic |
| 释义 | > as lemmaspiˈcritic piˈcritic adj. Geology containing or of the nature of picrite ( 2). ΘΚΠ the world > the earth > structure of the earth > constituent materials > rock > igneous rock > [adjective] > hypabyssal > varieties of ophiolitic1909 picritic1931 1931 Amer. Jrnl. Sci. 221 403 Even a picritic sub-basalt..exhibits some interstitial quartz. 1958 Trans. Royal Soc. Edinb. 63 459 It is proposed to use the term ‘picritic’ to denote, in minor intrusions and lavas, an amount of forsteritic olivine considerably beyond that which normally crystallizes in basaltic magma. This amount of olivine varies between 25 and 60 per cent. 1965 Carnegie Inst. Year Bk. 1964 126/2 In general, picritic lavas and hypabyssal intrusives are few in number and restricted to the lower parts of both oceanic and continental volcanic columns. 1993 Jrnl. Petrol. 34 682 Berg (1980) interpreted the Snowflake Troctolite Zone in the Hettasch Intrusion, Labrador, as representing a quench of picritic magma emplaced along the floor of a leucotroctolite magma chamber. < as lemmas |
| 随便看 |
英语词典包含1132095条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。