The intrusion sequence for igneous rocks is indicated by crosscutting and inclusion relationships . 火成岩的归入顺序由切割和包含关系来表示。
The synthetic interpretation of the gravity , magnetic , electrical , and seismic is an effective combination method to study the igneous rocks of the yingmaili area 重磁电震综合解释是研究塔北地区火成岩的有效方法组合。
Obsidian is a semi translucent to opaque natural glass formed by volcanic activity . its color is usually smoky brown to black or sometimes a mixture of both 黑曜石obsidian属于火成岩的一种,很多人都以为黑曜石并不属于水晶,但是黑曜的成分也是sio2二氧化硅为主。
Rhodochrosite is also credited with improving eyesight , enhancing memory , and improving the eyesight . obsidian is a semi translucent to opaque natural glass formed by volcanic activity 黑曜石obsidian属于火成岩的一种,黑曜石是火山溶岩迅速冷却后形成的一种天然玻璃,属于非纯晶质的水晶宝石。
The content of this paper consis of noise attenuation , amplitude compsation , deconvolution and retraced processing flows etc . this theme will illustrate some aimed processing in practice 处理攻关实例:渤海湾a区块,馆陶以下为200一900米的火成岩沉积,由于火成岩的屏蔽作用,长期以来,火成岩以下地层得不到好的反射。