noun
- a type of sandstone containing a mixture of quartz, feldspar, and rock fragments in a clay matrix
Usage: geology
Examples
- The geologist identified the rock sample as wacke based on its composition.
- Wacke formations are common in deep marine environments.
- The cliff face exposed layers of dark wacke sandstone.
- Students learned to distinguish wacke from other sedimentary rocks.
- The wacke contained visible fragments of volcanic material.