SEDIMENTARY ROCKS.

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Presentation transcript:

SEDIMENTARY ROCKS

SEDIMENTARY ROCKS Sedimentary rocks- formed from loose sediment (the broken fragments of other rocks). These sediments are transported, deposited and eventually compacted and cemented together. This is called lithification.

Clastic rocks are composed of fragments, or clasts, of pre-existing rock.

Bioclastic rocks are composed of organic debris such as plants (lignite, coal) or shells (coquina, fossiliferous limestone).

Chemical/ Crystalline: formed from minerals that were once dissolved in water.

Are all Sed. Rocks distinguishable in only one of the groups (Clastic, Organic, Chemical)??

Sed Rx mini-LAB GET OUT YOUR GREEN Rock ID Charts AND Your Objective Notes

Sedimentary Rock Features Stratification/Strata - is the building up of layers

Sedimentary Rock Features Mud Cracks - cracks formed by the drying, of the mud

Sedimentary Rock Features Ripple Marks - wavy feature formed by wind, wave, or current.

Sedimentary Rock Features Fossils - Organic organisms fossilized/cemented into rock layer.

Sed Rx I.D.-LAB Using your Rock mini-Lab for help with identification. When done get a check from Mr. Shelson Work on Test Review quietly at your lab table.

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Acid Rain Acid rain is rain or any other form of precipitation that is unusually acidic.

pH Scale DRAW this Scale Acidic Neutral Basic

pH Scale The pH scale measures how acidic or basic a substance is. The pH scale ranges from 0 to 14. A pH of 7 is neutral. A pH less than 7 is acidic. A pH greater than 7 is basic.

Parent Rock Sandy Soil Clay-Rich - QUARTZ - BASALT

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