地层

地层 refers to a layer or stratum of earth, typically used in geological contexts. It describes the horizontal layers of rock or soil that form over time, often used in discussions about geology, paleontology, and earth sciences.

The character 地 (dì) means 'earth' or 'ground,' while 层 (céng) means 'layer' or 'level.' Together, they form a compound that literally translates to 'earth layer,' emphasizing the concept of stratification in the earth's crust.

地层 is commonly used in scientific and academic settings, especially when discussing the formation of the Earth's surface. It is also sometimes used metaphorically in literature or politics to describe social or hierarchical layers.