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SEDIMENTARY ARCHIVES Terrestrial or Continental Environments.

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Presentation on theme: "SEDIMENTARY ARCHIVES Terrestrial or Continental Environments."— Presentation transcript:

1 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments

2 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments Fluvial

3 SEDIMENTARY ARCHIVES Continental Environments Fluvial Point Bar Silt, Sand, Clay Few fossils

4 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments Sediments highly variable, depends on energy of river

5 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments Alluvial fans

6 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments Lakes or Lacustrine

7 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments Lakes or Lacustrine

8 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments Glacial

9 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments Glacial

10 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments Glacial Till Outwash

11 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments Eolian

12 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments Eolian

13 SEDIMENTARY ARCHIVES Terrestrial or Continental Environments Eolian Wind can move sediment Sand size or smaller Very well sorted

14 SEDIMENTARY ARCHIVES Sedimentary Structures Formed during or shortly after deposition Prior to lithification Can be used to interpret environments "The question is not what you look at, but what you see" Henry David Thoreau November 1830

15 SEDIMENTARY ARCHIVES Sedimentary Structures Mudcracks

16 SEDIMENTARY ARCHIVES Sedimentary Structures

17 SEDIMENTARY ARCHIVES Sedimentary Structures

18 SEDIMENTARY ARCHIVES Sedimentary Structures Ripples Indicate direction Uni-directional = asymmetrical or current Bi-directional = symmetrical or oscillation Multi-directional = interference Found in shallow marine water and streams

19 SEDIMENTARY ARCHIVES Sedimentary Structures Ripples Oscillation RipplesUp direction?

20 SEDIMENTARY ARCHIVES Sedimentary Structures Ripples Current Ripples

21 SEDIMENTARY ARCHIVES Sedimentary Structures

22 SEDIMENTARY ARCHIVES Sedimentary Structures Ripples Interference Ripples

23 SEDIMENTARY ARCHIVES Sedimentary Structures Cross-bedding or Cross-stratification

24 SEDIMENTARY ARCHIVES Sedimentary Structures Cross-bedding or Cross-stratification Beds in which one set is inclined to others Advance of delta or dunes Current dominated environment Wind or water Slope of cross-bed can indicates current or prevailing wind direction

25 SEDIMENTARY ARCHIVES Sedimentary Structures Cross-bedding or Cross-stratification Tabular or Planar

26 SEDIMENTARY ARCHIVES Sedimentary Structures Cross-bedding or Cross-stratification Trough

27 SEDIMENTARY ARCHIVES Sedimentary Structures Graded beds


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