Paleoenvironmental Comments

1. size & shape interaction

2. shape studies

3. quartz sand size & roundness

4. quartz SEM studies

5. unstrained quartz

6. shape sorting

7. faceted pebbles, dreikanter/ventifacts

8. wind blown sands

best sorting 0.1-0.3 mm

9. flat iron shape & striated surface

10. river & beach pebbles

11. grain 1-10 mm movement

12. pebble roundness & paleocurrents

13. stream pebble orientation

13a.

beach pebbles

13b.

imbrication & location

14. imbrication genesis

15. pebble orientation in conglomerates & turbidite sequences;

16. glacial till clasts

17. silt & clay in sands

18. streamline shape

19. size analysis

20. sediment transport rate

21. fluvial facies

22. grain orientation

23. massive sands

24. rolling clasts

25. small clasts & fissility

26. grain orientation in ripples

27. cross beds

28. 3 facies interpretation from grain orientation

28a.

river channel sands

28b.

beach sands

28c.

barrier island sands variable

3 barrier island facies: offshore, beach, aeolian

29. black materials

30. kaolinite rind on feldspars - pseudomorphs

31. feldspar alteration

32. heavy minerals

33. quartz & carbonate together

34. parent material

35. source area/provenance

links to real world images

36. provenance & orogenic setting

igneous & metamorphic rocks & tectonic settings

37. heavy- mineral assemblages

 

Gel3510 Sedimentation page

rbj 10/1999