lewis and clark trail state park of
- Clastic rock (Wikipedia)
Clastic rocks are composed of fragments, or clasts, of pre-existing minerals and rock. A clast is a fragment of geological detritus, chunks, and smaller grains of rock broken off other rocks by physical weathering. Geologists use the term clastic to refer to sedimentary rocks and particles in sediment transport, whether in suspension or as bed load, and in sediment deposits.
- Touchet River (Wikipedia)
The Touchet River /ˈtuːʃi/ is a 65-mile (105 km) tributary of the Walla Walla River in southeastern Washington in the United States. The Touchet River drains an area of about 752 square miles (1,950 km2) in Columbia County and Walla Walla County.