paleovolcanic是什么意思

用法例句

The geochemical characteristics and ore-prospecting effects in Yiyang palaeovolcanic rock area of Hunan Province;

根据地球化学特征在古火山岩区寻找金矿

The geochemical feature and forming tectonic environment of Zhangchun group palaeovolcanic rock, Northeast Jiangxi;

赣东北张村岩群古火山岩地球化学特征及形成构造环境

Long-standing ancient remains, rare paleovolcanoes-The thinking f or establishing the national geologic park of the Shanmen, Siping-Yitong volcano es;

悠悠古遗址 珍稀古火山——关于建立四平山门—伊通火山国家地质公园的若干思考

Researches in paleovolcanic geology and metallogeny to Zheyaoshan Cu-Zn deposit area of Baiyin Ore-field suggest that the area is a large paleovolcanic crater well-developed with a suite of erupted,erupt-flooded and flooded phases,volcanic stump,subvolcanic intrusions and extrusives as well as erupt-sedemantary phases.

古火山地质学和矿床学研究表明，白银矿田折腰山Ｃｕ－Ｚｎ矿床地段，是一个火山岩岩相发育齐全（包括喷发－爆发相、喷发－溢流相、溢流相、火山颈相、次火山侵入相、火山侵出相以及喷发－沉积相）、空间展布有序、相序关系清楚的大型古火山口。