1 / 15

ROCKS THAT FORM FROM AN ACCUMULATION OF SEDIMENTS DERIVED FROM PREEXISTING ROCKS AND/OR ORGANIC MATERIALS

Sedimentary Rocks . ROCKS THAT FORM FROM AN ACCUMULATION OF SEDIMENTS DERIVED FROM PREEXISTING ROCKS AND/OR ORGANIC MATERIALS. THREE KINDS OF SEDIMENTARY ROCKS. Clastic. Chemical (Crystalline) . Organic (Bioclastic) . CLASTIC SEDIMENTARY ROCKS.

crevan
Download Presentation

ROCKS THAT FORM FROM AN ACCUMULATION OF SEDIMENTS DERIVED FROM PREEXISTING ROCKS AND/OR ORGANIC MATERIALS

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 Rocks ROCKS THAT FORMFROM AN ACCUMULATION OF SEDIMENTS DERIVED FROM PREEXISTING ROCKS AND/OR ORGANIC MATERIALS

  2. THREE KINDS OF SEDIMENTARY ROCKS Clastic Chemical (Crystalline) Organic (Bioclastic)

  3. CLASTIC SEDIMENTARY ROCKS FORM FROM SOLID FRAGMENTS (SEDIMENTS) OF OTHER ROCKS. EXAMPLES: SHALE, SANDSTONE, CONGLOMERATE SEDIMENTS COME FROM THE WEATHERING OF EXISTING ROCKS. PARTICLE SIZE largest -> -> -> -> -> smallest BOULDERS, PEBBLES, SAND, SILT, CLAY

  4. Transportation and Sorting of Sediments FRAGMENTS ARE MOVED MOSTLY BY RUNNING WATER. WINDS, WAVES, AND GLACIERS ALSO MOVE PARTICLES. THE FARTHER A PARTICLE TRAVELS THE ROUNDER IT BECOMES ROCK FRAGMENTS SEPARATE THROUGH HORIZONTAL AND VERTICAL SORTING

  5. Lithification IS THE COMPACTION AND CEMENTATION OF ROCK FRAGMENTS THAT FORM SEDIMENTARY ROCKS. - THE LARGER THE SEDIMENTS IN THE ROCK THE MORE PERMEABLE (ABILITY TO LET WATER PASS THROUGH) THE ROCK.

  6. CONGLOMERATE IS A MIXTURE OF LARGE ROUNDED PEBBLES CEMENTED TOGETHER BY SMALLER SEDIMENTS (BRECCIA HAS ANGULAR FRAGMENTS)

  7. SANDSTONES ARE MADE LARGELY OF QUARTZ GRAINS. (PERMEABLE)

  8. SHALE FORMS FROM THE COMPACTION OF TINY FLAKES OF CLAY. (IMPERMEABLE)

  9. Chemical (Crystalline) Sedimentary Rocks FORM FROM THE PRECIPITATION OF MINERALS OUT OF SOLUTION THE MAIN CAUSE FOR DISSOLVED MINERALS TO PRECIPITATE, OR DROP OUT OF THE WATER, IS EVAPORATION. (SHALLOW SEA ENVIRONMENT)

  10. THIS RESULTS IN A CRYSTALLINE MASS OF INTERGROWN MINERAL CRYSTALS Examples LIMESTONE - COMPOSED PRIMARILY OF CALCITE; FIZZES WITH HCL DOLOSTONE - FIZZES WHEN POWDERED ROCK SALT - SAME PROPERTIES OF HALITE ROCK GYPSUM - SAME PROPERTIES OF GYPSUM

  11. Organic (Bioclastic) Sedimentary Rocks FORM FROM THE REMAINS OF LIVING THINGS OR ROCKS CONTAINING FOSSILS LIMESTONES (FIZZES IN HCL)- CONTAINS SHELLS COAL (SOOTY)- BURIAL OF DECAYED PLANTS; SWAMPS FOSSILIFEROUS SHALE – SHALE CONTAINING FOSSILS

  12. Sedimentary Features STRATIFICATION IS THE ARRANGEMENT OF DIFFERENT VISIBLE LAYERS OF ROCK.WHEN THE TYPE OF SEDIMENTS FOUND IN AN AREA CHANGE, A NEW TYPE OF SEDIMENTARY ROCK FORMS EX. GRAND CANYON

  13. FOSSILS ARE THE REMAINS, IMPRESSIONS, OR ANY OTHER EVIDENCE OF PLANTS AND ANIMALS PRESERVED IN ROCK.

  14. RIPPLE MARKS ARE FORMED BY THE ACTION OF WINDS, STREAMS, WAVES, AND CURRENTS ON SAND, AND FORM ON THE SURFACE OF BEDDING PLANES. MUD CRACKS DEVELOP WHEN DEPOSITS OF WET CLAY DRY UP AND CONTRACT.

  15. GEODES ARE HOLLOW SPHERES IN WHICH GROUNDWATER HAS DEPOSITED MINERALS

More Related