Most metamorphic rocks have been greatly changed and deformed that any fossils preserved In the origInal rocks will not be recognizable. 绝大多数变质岩曾遭受过剧烈的变化和变形,任何在原岩中保存的化石将因这种后来的变化和变形而无法辨认。
( especially of metamorphic rock) having thin leaflike layers or strata. (特别是指变质岩石)有像叶子一样的薄岩层或者地层。
Classification and nomenclature schemes of the rocks Classification and nomenclature schemes of metamorphic rocks GB/T17412.3-1998岩石分类和命名方案变质岩岩石的分类和命名方案
Nanxiong in geology is Yanshanian Sinian Cambrian granite and metamorphic rocks body. 南雄境内地质属燕山期花岗岩体及寒武纪震旦纪变质岩体。
The analysis results show that there are two types of zircons from the Danzhu granodiorite: magmatic zircon and metamorphic zircon. 研究结果表明,该花岗闪长岩中存在两种不同类型的锆石:岩浆锆石和变质锆石。
Even foliated metamorphic rocks and banded gabbro can be curved to form folds. 即使变质岩中的片理以及辉长岩中的条带也可产生弯曲而形成褶皱。
Gneiss, a metamorphic rock, can be commonly found in Precambrian areas. 片麻岩,变质岩,可以发现,在常见的前寒武纪地区。
Rocks are classified into three main types: igneous, sedimentary, and metamorphic. 岩石分为三大类:火成岩、沉积岩和变质岩。
As the important member in Dabie ultrahigh pressure metamorphic belt, meta-granitoids are often associated with coesite-bearing eclogites. 大别山超高压变质带中变质花岗岩常与榴辉岩密切伴生。
Classification of Rock Mass Structures in Slopes of Magmatic and Metamorphic Rocks 蛇绿岩-放射虫岩推覆体岩浆岩和变质岩边坡岩体结构类型的划分
Dark brown to black mica found in igneous and metamorphic rock. 深棕色到黑色的云母,发现于火成岩与变质岩中。
We have the different understanding of metamorphic rock in the work area, then change the mixed granite and a part of migmatite into granite. 对区内变质岩有不同的认识,将混合花岗岩和混合岩中的一部分改为花岗岩。
The Imjingang and Ogcheon belts do not exhibit any metamorphic characteristics of collisional orogenic belts. 临津江带和沃川带都不具有碰撞造山带的变质特征。
Discovery and geological significance of metamorphic and intrusive rock ( system) of Qimantage region in Jinning epoch; 政和地区变质岩石形成于晋宁期,遭受了四期复杂的构造变形作用。
Metamorphic basement of the jiangnan Proterozoic Paleo-island arc mainly consists of low-grade metamorphic volcanic sedimentary rocks. 江南元古宙古岛弧的基底变质岩主要由浅变质的岛弧火山&沉积岩系组成。
The Archaean meta-basalts are distinguished into two meta-basalts formed in the greenstone belt and in the high-grade metamorphic region. 本文把太古代变质玄武岩分成绿岩带变质玄武岩和高级区变质玄武岩。
A fine-grained metamorphic rock formed by the action of heat on clay rocks. 一种细颗粒的变质岩,由泥质岩受热形成。
A brown or yellow-green olivine found in igneous and metamorphic rocks and used as a gemstone. 一种褐色或黄绿色的橄榄石,见于火成岩和变质岩中,用作宝石。
Hydrocarbons commonly occur in sedimentary basins and are absent from intervening areas of igneous and metamorphic rocks. 在沉积盆地中,碳氢化合物很常见,而在间杂的火成岩与变质岩中则找不到。
A laminated metamorphic rock similar to granite. 一种类似花岗岩的片状变质岩。
What kinds of regional metamorphic rocks are present in the area? 在这一地区有哪些种类的区域变质岩?
A metamorphic rock composed chiefly of amphibole and plagioclase. 一种主要由闪石和斜长岩组成的变质岩。
In this paper, the amphibolites in Chencai group metamorphic rocks have been studied by means of geochemistry. 本文对陈蔡群变质岩中的斜长用闪岩进行了地球化学研究。
Some metamorphic minerals, such as tourmaline and piedmontite, also occur in skarn rock. 在矽卡岩中还有与电气石、红帘石等变质矿物。
The tectonic evolution of west Tianshan includes three deformation cycles and six deformation generations, which bear close relationship with sedimentary, metamorphic and magmatic events. 在西天山的构造演化中,至少发生了三个变形旋回和六个变形世代的构造事件,并伴随着密切相关的沉积事件、变质事件和岩浆事件。
High-pressure metamorphic rocks form during subduction of Earth's crust to mantle depths at convergent plate margins. 高压变质岩是在俯冲的过程中形成的,从地壳到地幔,深度不等的聚合板块边缘。
The high-grade metamorphic complexes, extending from east to west, experienced multiple phases of deformation and metamorphism. 区内高级变质杂岩总体上呈近东西向延伸,经历多期变质变形作用改造。
The oldest metamorphic rock and the youngest Danxia landscapes coexist. 这里,湖南最老的变质岩和最年青的丹霞共存。
The amphibolite and basic granulite may be comparable to the world's metamorphic tholeiite. 斜长角闪岩和基性麻粒岩可与世界变质拉斑玄武岩对比。
The process of change from any previously existing rocks into metamorphic rocks is called metamorphism. 将原来岩石改变成为变质岩的这种作用称之为变质作用。