LOWEST STRATUM Crossword Clue
LOWEST STRATUM Crossword Clue
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Crossword Puzzle Infos
The lowest stratum is referred to as BEDROCK, which is the solid rock that lies beneath soil, sand, and gravel. BEDROCK is the most basic layer of the Earth's crust and is composed of igneous, sedimentary, and metamorphic rocks. It is the foundation of the Earth's surface and provides stability for the land above it.