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研究沉积岩时,对其颜色的描述有着重要的意义。因为沉积岩的颜色代表着它形成时的物质来源、沉积环境及气候变化条件等;同时颜色也是划分和对比地层的良好标志。为此,本文拟对沉积岩颜色描述中常出现的一些问题,谈几点看法。 (一)复合色问题: 复合色亦称混合色,系指某岩层显示由两种或三种色素混合而成的颜色,如紫红色、灰黄绿色等。在描述复合色时,应遵循“前次后主”的原则。即所描述的颜色,后边是主色,前边系附加成分,是形容主色的。例如,紫红色指带有紫色的红色;灰黄绿色指以绿色为
When studying sedimentary rocks, its color description is of great significance. Because the sedimentary rock color represents the material source when it is formed, sedimentary environment and climate change conditions; at the same time the color is also a good marker for the division and contrast stratigraphy. For this reason, this article intends to talk about some problems often appearing in the color description of sedimentary rocks. (A) the complex color issue: complex color, also known as mixed color, refers to a rock formation by two or three colors mixed colors, such as purple, gray-green. In describing the complex color, should follow the “last Lord” principle. That described the color, followed by the main color, the front of additional components, is to describe the main color. For example, purple refers to purple with red; gray-green refers to green