Inorganic Land-Derived Sedimentary Rocks

Texture

Clastic

Pebbles, cobbles, and/or boulders embedded in sand, silt, and/or clay

Grain Size

Composition

Comments

Rock Name

Sand

(0.006 to 0.2cm)

Silt

(0.0004 to 0.006cm)

Clay

(less than 0.0004cm)

Mostly quartz, feldspar, and clay minerals; may contain fragments of other rocks and minerals

Rounded Fragments

Angular Fragments

Fine to coarse

Very fine grain

Compact, may split easily

Conglomerate

Breccia

Sandstone (sst)

Siltstone

Shale