1 / 27

SEDIMENTARY ARCHIVES

SEDIMENTARY ARCHIVES. Sedimentary Structures Sole marks. SEDIMENTARY ARCHIVES. Sedimentary Structures Flute casts. SEDIMENTARY ARCHIVES. Sedimentary Structures Tool marks. SEDIMENTARY ARCHIVES. Sedimentary Structures Flame Structures. SEDIMENTARY ARCHIVES. Sedimentary Structures

hkunkel
Download Presentation

SEDIMENTARY ARCHIVES

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. SEDIMENTARY ARCHIVES Sedimentary Structures Sole marks

  2. SEDIMENTARY ARCHIVES Sedimentary Structures Flute casts

  3. SEDIMENTARY ARCHIVES Sedimentary Structures Tool marks

  4. SEDIMENTARY ARCHIVES Sedimentary Structures Flame Structures

  5. SEDIMENTARY ARCHIVES Sedimentary Structures Geopetal Structures or Which Way is UP? Load structures

  6. SEDIMENTARY ARCHIVES Sedimentary Structures Geopetal Structures or Which Way is UP? Mudcracks

  7. SEDIMENTARY ARCHIVES Sedimentary Structures Geopetal Structures or Which Way is UP? Planar Cross-beds

  8. SEDIMENTARY ARCHIVES Sedimentary Structures Geopetal Structures or Which Way is UP? Trough Cross-beds

  9. SEDIMENTARY ARCHIVES Sedimentary Structures Geopetal Structures or Which Way is UP? Oscillation ripples

  10. SEDIMENTARY ARCHIVES Sedimentary Structures Geopetal Structures or Which Way is UP? Tool marks

  11. SEDIMENTARY ARCHIVES Sedimentary Structures Geopetal Structures or Which Way is UP? Fossils

  12. SEDIMENTARY ARCHIVES Sedimentary Structures Geopetal Structures or Which Way is UP? Fossils

  13. SEDIMENTARY ARCHIVES Sedimentary Structures Geopetal Structures or Which Way is UP? Raindrop Impressions

  14. SEDIMENTARY ARCHIVES Interpretation of Sedimentary Rocks Provide information about conditions in and near the site of deposition Such as: source area from composition amount of transport erosion Qtz vs. Feldspar (clay and iron compounds) vs Ferromagnesians Immature vs mature

  15. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks "Systems of classification are not hatracks, objectively presented to us by nature. They are dynamic theories developed to express particular views..." Stephen Jay Gould

  16. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks

  17. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks

  18. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks TEXTURE

  19. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks

  20. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks • >90% Quartz • Cement: silica calcite Quartz Arenite

  21. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks • >25% Feldspar • Granitic source • Remainder is quartz • Cement: clay calcite iron oxides Feldspathic Arenite Arkose

  22. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks • >33% rock fragments • Immature sandstone • Poorly sorted, angular • Remainder is quartz, feldspar • Cement: very little mostly clays Lithic Arenite Greywacke

  23. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks

  24. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks Carbonates • Composition • Carbonate rocks consist of limestone and dolostone. The minerals present in each are: • Limestone • Calcite • Aragonite • Dolostone • Dolomite

  25. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks Carbonates Most of marine origin Directly or indirectly related to biological processes Skeletal remains may be visible Can be evaporites Changes in water temp., alkalinity, CO2 conc. Clear, shallow tropical waters

  26. SEDIMENTARY ARCHIVES Classification of Sedimentary Rocks Carbonates Characteristics of most marine carbonate environments: Warm water Tropical climate (30 ° N - 30 ° S of equator) Shallow water (less than 200 m deep) Clear water (low to no terrigenous input) Sunlight required for photosynthesis by algae

More Related