The best size of gravel depends on the intended landscaping use and type of rock. To line or mulch a garden bed with smooth gravel, use rocks 1- to 2-inches in diameter.

Overall, out of all of the separate subtypes of sedimentary rock, fossils are most abundant in shale, sandstone and limestone, though they also appear in conglomerates and breccias. Shale With ...

Shale is a sedimentary rock made up of tiny grains of silica, clay and other minerals. Many types of rock have few physical or chemical differences in a particular chunk of that rock.

Sedimentary rock is one of the three main rock ... Sedimentary rocks include common types such as chalk, limestone, sandstone, clay and shale. Sedimentary rocks cover 75% of the Earth's surface.

The Science. Shale is a sedimentary rock made up of tiny grains of silica, clay and other minerals. Many types of rock have few physical or chemical differences in a particular chunk of that rock.

The best size of gravel depends on the intended landscaping use and type of rock. To line or mulch a garden bed with smooth gravel, use rocks 1- to 2-inches in diameter.