yrvaand it's for our purposes we're actually going to draw a line and say it's not quite right to call it a thing. Unless you'd suggest a giant expanse of nothing is a thing but let's save that for another episode.. The climax of metamorphic crystallisation occurred at the low pressure granulite facies amphibolite facies boundary with mineral parageneses corresponding closely with the sillimanite cordierite orthoclase subfacies of the Abukuma type cordierite amphibolite facies except for the additional occurrence of orthopyroxene. Analyses of gneissic and some igneous rocks are presented. These data reveal significant differences between basic rocks of the two gneiss series. | 欢迎光临 深圳教育网 (http://szjyw.com/) | Powered by Discuz! X3.4 |