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

2. Chemical Rock Texture
Crystalline Texture
Coarse
Fine

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

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

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

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

7. Sorting

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

9. Clast Supported Conglomerate (River Deposits)

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

11. Interpretation: Distance of Transport
Short
Far

12. Surface of Saturn’s Moon - Titan

13. Rounding & Shape
Spherical
Oblong

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

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

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

17. Sandstones Under a Scope

18. Diagenesis: Lithification
Sediment
Rock

19. Cementation
Typical Cement:
Calcite
Quartz