1.
geological stratum, rock layer
A layer of sedimentary rock or soil with internally consistent characteristics that distinguishes it from adjacent layers.
By studying the geological strata, we can understand the environment of the past.
Usage: 地層 is a technical term used in geology and earth science to describe layers of rock and sediment.
Common collocations
- 地層を調べる (to examine strata)
- 地層が堆積する (strata accumulate)
- 地層の断面 (cross-section of strata)
- 地層調査 (geological survey)
Geological terms
Stratigraphy: 地層の年代測定 (dating of strata) uses methods like radiocarbon dating and fossil correlation to determine the age of rock layers.