noun
- plural of siltstone; fine-grained sedimentary rocks composed primarily of silt-sized particles
Usage: geology
Examples
- The geologist collected samples of siltstones from the riverbank.
- These siltstones formed millions of years ago when fine sediments settled in ancient lakes.
- The construction crew encountered layers of siltstones while digging the foundation.
- Siltstones are softer than sandstones but harder than mudstones.
- The fossil was perfectly preserved in the siltstones.
- Oil companies often drill through siltstones to reach deeper rock formations.