1. Logging Clastics Depth Scale Contacts Grain Size Rock Type
Bioturbation
Color
Fossils and Sedimentary Structures
Comments
Text: Manual, p ; Compton, Ch. 11; p

2. Logging Clastics Goals To accurately and graphically represent:
Thicknesses of rock types.
Detailed, sequential descriptions.
Exact stratigraphic position of rock types,
sedimentary structures, and fossils.

3. Logging Clastics

4. Logging Clastics

5. Logging Clastics

6. Logging Clastics Depth Scale Contacts Grain Size Rock Type
Bioturbation
Color
Fossils and Sedimentary Structures
Comments
Text: Compton, Ch. 11; p

7. Calculate total depth and appropriate scale / units
Depth Scale
Calculate total depth and appropriate scale / units
Deepest (bottom)  Shallowest (top)

8. Contacts Mark major contacts
Determine nature of contacts (sharp, gradational, erosional)

9. Contacts S Sharp G Gradational
SI Sharp irregular B Gradational-interbedded
SC Sharp conformable VS Visibly scoured
SD Sharp disconformable BU Burrowed
ST Stylolite

10. Grain Size Determine grain size between major contacts.
Plot weathering profile of gravel:sand:mud.

11. Grain Size
Weathering Profile

12. Logging Clastics Depth Scale Contacts Grain Size Rock Type
Bioturbation
Color
Fossils and Sedimentary Structures
Comments
Text: Manual, p ; Compton, Ch. 11; p

13. Rock Type Determine rock type(s) and fill in patterns
(see Compton, p )

14. Rock Type
(Manual, p. 92)

15. Bioturbation
Determine extent of bioturbation

16. Color Indicate color with letter symbols. L - Light G - Gray C - Cream
M - Medium B - Brown W - White
D - Dark R - Red Bk - Black
m - Mottled O - Orange Cl - Clear
Y - Yellow Gn - Green
Bl – Blue
Example: LBG = light brownish gray

17. Logging Clastics Depth Scale Contacts Grain Size Rock Type
Bioturbation
Color
Fossils and Sedimentary Structures
Comments
Text: Manual, p ; Compton, Ch. 11; p

18. Fossils and Sedimentary Structures
Indicate fossils and sedimentary structures
(Manual p. 21a)

19. Fossils and Sedimentary Structures

20. Sedimentary Structures
Fossils and
Sedimentary Structures
Carbonate Structures
(Manual, p. 94)

21. Comments Include comments of features not depicted graphically
- soil horizons
- organics
- accessory minerals
- cements
- porosity

22. Examples

23. Examples

24. Examples

25. Examples