noun
- a fine-grained sedimentary rock composed primarily of silt-sized particles
Usage: geology
Examples
- The geologist identified the gray rock formation as siltstone.
- Siltstone layers were visible in the cliff face along the river.
- The ancient siltstone contained well-preserved fossils.
- Construction workers encountered siltstone while digging the foundation.
- The quarry produced high-quality siltstone for building materials.
- Siltstone forms when fine sediments are compressed over millions of years.