Bits and pieces of other rocks that have been weathered.
Precipitation of ions, chemical weathering.
Order of sediments
Gravel, sand, silt, clay.
Gravel. Large pieces clearly visible.
Sand. Sand grains, gritty and visible.
Silt. Mainly quartz, silt sized grains
Clay. Mostly clay and mud, no grains visible.
Salty, formed from halite.
Fine grained, soft.
Fizzes in HCl.
Clear shells in rock.
Banded, forms in caves, looks kind of like bacon.