地層

1. Origins, structure, and basic meaning

• Structure: The geological noun 地層 (ちそう) is a stratum or layer formed by accumulated material.
• Basic usage: Exposed layers can be sketched on a cliff, and multiple 地層 may be described as overlapping in different colors.

2. Common pitfalls and similar expressions

• Layers of earth and rock
  • It denotes a layered structure formed over time, not merely one patch of ground surface.