岩相 （lithic facies）是一定沉积环境中形成的岩石或岩石组合，它是沉积相的主要组成部分。岩相和沉积相是从属关系，而不是同一关系。另外，为了突出沉积环境中的古地理条件和沉积物特征中的岩性特征，通常把“岩相”和“古地理”这两个术语联系在一起，以表示沉积相中最重要最本质的内容。
n. lithofacies ; petrofacies
岩相显微镜 petrographic microscope
角闪岩相 amphibolite facies ; amphibolitic facies
岩相分析 Petrographic description ; RockClass ; [地质] lithofacies analysis ; facies analysis
岩相学分类 lithologic division
榴辉岩相 [岩] eclogite facies
角页岩相 [岩] hornfels facies
凝灰岩相 tuffaceous facies
成岩相 lapidofacies ; diagenetic facres
岩相学家 [地质] petrographer
It uses drilling welllogging, seismic section and outcrop to interpret the sedimentary system tracttridimensionally and each lithoface in basin , also recapitulate three dimensionalsedimentary pattern.
它综合利用钻井测井曲线、地震剖面及地表露头三种资料对盆地的沉积体系域及各岩相作立体解释,并概括为具有三维空间立体概念的沉积模式。
参考来源 - 柴达木盆地三湖凹陷北斜坡第四系层序地层学研究The analysis of volcanic petrology indicates that the volcanic lithofacies can be divided into volcanic breccia, lava, ash and sedimentary ones.
通过对火山岩岩石学特征分析,将火山岩岩相划分为火山角砾岩柑、火山熔岩相、火山灰相和火山沉积相。
参考来源 - 大洼油田中生界火山岩储集层特征·2,447,543篇论文数据，部分数据来源于NoteExpress
断裂带中已存在的角闪岩相岩石已与绿泥石新形成的逆行绿片岩相叠加。
The pre-exist amphibolite facies rocks in the fracture belt have been superimposed by retrograde green-schist facies with neoformation of chlorite.
岩相构造分析表明，该岩体并不是一个简单的透镜体。
Litho-tectonic analyses indicate that the rock body is not a simple lens.
据此，辛顿和鲍尔斯认为，这处火山岩相当年轻——大概几百岁。
This observation leads Sinton and Bowles to think the lava is fairly young-maybe a few hundred years old.
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