Shaley means like a shale or having some shale component, as in shaley sandstone. One of the most common compounds in the Earth's crust. Common window glass is made of silica. The building block of the mineral quartz and other silicate minerals. Silicate minerals make up most rocks we see at the Earth's surface.
Silt is finer than sand, but coarser than clay. .
A depression in the surface commonly found in in karst landscapes. Sinkholes often form where limestone or some other soluble rock is partially dissolved by groundwater , then collapses to form a depression. Also known as dolines. The sliding mass of rock is called a slump block . All loose, unconsolidated earth and organic materials above bedrock that support plant growth. .