noun
- organic sediments rich in hydrogen and carbon that accumulate in stagnant water bodies and can form petroleum over geological time
Usage: geological; technical
Examples
- The lake bottom contained thick layers of sapropels from centuries of organic matter accumulation.
- Geologists study sapropels to understand ancient environmental conditions.
- These sapropels formed in oxygen-poor waters where organic material could not fully decompose.
- The black sapropels indicated periods of high biological productivity in the ancient sea.
- Oil companies analyze sapropels as potential source rocks for petroleum formation.
- The core samples revealed alternating layers of sapropels and clay deposits.