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三、怎样研究沉积相(一)以古生物作为确定沉积相的最重要依据因为生物对环境极为敏感.因而人们将其作为划分沉积相的主要依据。1.最简单的分带有时人们因为无条件或者仅需作一般了解,常常根据底栖或浮游生物的相对含量,便可大体粗略地判断大的沉积相带。如台地以底栖生物为主,盆地以浮游生物为主,而斜坡带在生物组合上则属混相带.既有底栖生物,亦有相当量的浮游生物。2.利用生物共生组合分带人们看到各种沉积环境下常有一些标志性共生化石可供划分沉积相带之用。例如:泻湖相:
How to study sedimentary facies (1) Paleontology is the most important basis for determining sedimentary facies Because organisms are extremely sensitive to the environment, they are the main basis for the division of sedimentary facies. 1. The easiest zoning Sometimes people because of unconditional or only for general understanding, often based on the relative content of benthic or plankton can be roughly roughly determine the large sedimentary facies. For example, benthic benthic merozoites are dominant in the platform, plankton dominated the basin, and the slope zone belonged to a mixed phase on the biological assemblage, which included both benthic organisms and a considerable amount of plankton. 2. The use of bio-symbiotic combination zoning people see a variety of sedimentary environment often some of the landmark symbiotic fossils for the division of sedimentary facies purposes. For example: lagoon phase: