Jisho

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ちそう 地層
Common word Links
Noun
1. stratum; geological formation; layer; bed (coal, gravel, etc.)​
Wikipedia definition
2. Stratum​In geology and related fields, a stratum is a layer of sedimentary rock or soil with internally consistent characteristics that distinguish it from other layers. The "stratum" is the fundamental unit in a stratigraphic column and forms the basis of the study of stratigraphy. When planning civil engineering projects or other large constructions, the strata of the area where the construction takes place is a significant factor in design decisions.
Read “Stratum” on English Wikipedia
Read “地層” on Japanese Wikipedia
Read “Stratum” on DBpedia

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