ROCKS THAT FORM FROM AN ACCUMULATION OF SEDIMENTS DERIVED FROM PREEXISTING ROCKS AND/OR ORGANIC MATERIALS - PowerPoint PPT Presentation

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

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ROCKS THAT FORM FROM AN ACCUMULATION OF SEDIMENTS DERIVED FROM PREEXISTING ROCKS AND/OR ORGANIC MATERIALS Sediments that harden into rocks. Here's a recipe for ... – PowerPoint PPT presentation

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


1
Sedimentary Rocks
ROCKS THAT FORM FROM AN ACCUMULATION OF SEDIMENTS
DERIVED FROM PREEXISTING ROCKS AND/OR ORGANIC
MATERIALS
Sediments that harden into rocks.
2
  • Here's a recipe for sedimentary rockYou take a
    layer of sand and put another hundred layers on
    top,Then let it sit for years and years,Let the
    pressure build -You know, it may sound
    weird,But that's how you make sedimentary rock!

3
THREE KINDS OF SEDIMENTARY ROCKS
Clastic
Chemical (Crystalline)
Organic (Bioclastic)
4
What does a rock want to be when it grows up?
  • A rock star!

5
CLASTIC SEDIMENTARY ROCKS
FORM FROM SOLID FRAGMENTS (SEDIMENTS) OF OTHER
ROCKS. EXAMPLES SHALE, SANDSTONE, CONGLOMERATE
SEDIMENTS COME FROM THE WEATHERING OF EXISTING
ROCKS.
6
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
7
Horizontal Sorting
8
Vertical Sorting
9
What do you do to a baby rock?
  • Rock it!

10
Lithification

IS THE COMPACTION AND CEMENTATION OF ROCK
FRAGMENTS THAT FORM SEDIMENTARY ROCKS.
In coarse sediments (gravel and sand) sediments
do not stick together unless cemented. Dissolved
minerals settle into spaces between grains and
bind them together.
- THE LARGER THE SEDIMENTS IN THE ROCK THE MORE
PERMEABLE (ABILITY TO LET WATER PASS THROUGH) THE
ROCK.
11

12
Where is a rocks favorite golf course?
  • Pebble Beach!

13
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)
14
THIS RESULTS IN A CRYSTALLINE MASS OF INTERGROWN
MINERAL CRYSTALS
15
Whats a rocks favorite cereal?
  • Cocoa Pebbles!

16
Organic (Bioclastic) Sedimentary Rocks
Form from the remains of living things or rocks
containing fossils
17
Sedimentary Features
Stratification is the arrangement if different
visible layers of rock.
Fossils - are the remains, impressions, or any
other evidence of plants and animals preserved in
rock.
18
Whats a rocks favorite type of music?
  • Rock n Roll!

19
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