凝灰质 meaning in English
tuffaceous
Examples
- The main characters of the thermal fluid activity are recognized as follow : many types and stages of veins are widely developed ; vitrinite reflectivity of different areas varies apparently with the depth ; there was a high temperature field during the formation of the thermal fluid , meanwhile , the volcaniclastic rocks were modificated by the thermal fluid activity , for example , sericitization of plagioclase , chloritization of volcanic detritus in andesitic detris tuff ; in the tufaceous mud , the thermal fluid activity accelerates " maturating " of the organic carbon by heating ; and the trace elements show an anomaly in the wall rocks
同时，受热流体活动的影响，热流体对火山碎屑岩具有一定改造作用，如在安山质岩屑凝灰岩中，斜长石绢云母化、火山岩岩屑绿泥石化明显；在凝灰质泥岩中，热流体对围岩中有机碳具有明显的“催熟”加热作用，微量元素则出现异常现象。 - Lithologically different rock sheets intertexturally superimposed with faults and folds of various styles . while , the southern belt is chiefly of devonian tuff , tuffaceous schist , marble relatively stable in strata and manifested by regional asymmetric fold easi - westward in axis , with well developed superimposed overthrust south - northward which controlled the whole structural framework in this area
南带以泥盆系凝灰岩、凝灰质片岩、大理岩为主，地层相对稳定，表现为轴向东西的区域性不对称褶皱，广泛分布控制全区构造格局的南北向逆冲推覆的叠瓦式断裂。