Texture Detrital (Clastic Texture) vs. Chemical (Crystalline Texture)

Chemical Rock Texture Crystalline Texture Coarse Fine

Detrital Rock Texture Clastic Texture Grain Size Grain Sorting Grain Rounding Grain Shape Sediment Maturity

Grain Size Gravel 2mm Sand 1/16 mm Mud - Silt 1/256 mm Mud - Clay

Detrital Rock Names (Based Primarily on Grain Size) Gravel -Sized: Conglomerate Sand Sized: Sandstone Mud-Sized: Mudstone Siltstone Shale

Grain Size Interpretation Gravel Sand Silt Clay High Energy Low Energy River, Beach River, Beach, Desert Delta, Shallow Ocean Deep Ocean, Lake, Swamp

Sorting

Sorting Interpretation: Poorly Sorted Well Sorted Transport Agent Gravity and Glaciers (and Rivers) Water and Wind

Clast Supported Conglomerate (River Deposits)

Matrix Supported Conglomerate (Glacial/Landslide Deposits) 2.2 Gyr Conglomerate “Modern” Glacial Sediments

Interpretation: Distance of Transport Short Far

Surface of Saturn’s Moon - Titan

Rounding & Shape Spherical Oblong

Gravel Sized Detrital Rocks (Subdivided Based on Grain Roundness) Conglomerate Breccia

Maturity Immature Mature Well Sorted Poorly Sorted Well Rounded All Quartz Immature Poorly Sorted Angular grains Mixed Composition

Sandstones (Subdivided based on maturity) Quartz Sandstone Arkose (Sandstone) Lithic Sandstone Sandstones (Subdivided based on maturity) Greywacke

Sandstones Under a Scope

Diagenesis: Lithification Sediment Rock

Cementation Typical Cement: Calcite Quartz