1. Chemical Sedimentary Rock
Hill Science 6

2. Chemical Sedimentary Rock
Most common chemical sedimentary rock is limestone.
Forms in shallow sea water
CaCO3 precipitates out of sea water and forms limestone.

3. To Create a Precipitate

4. Chemical Sedimentary Rock
Chert – silica flint, agate and jasper
Yellowstone travertine - CaCO3 from hot springs
agate
chert

5. Chemical Sedimentary Rock
Geodes – silica filled cavities in limestone left by gas or organic matter that has decayed

6. Chemical Sedimentary Rock
Evaporites – crystals form when water evaporates gypsum, halite

7. Sedimentary Rocks
Tell us what the Earth's surface was like in the past.
Only sedimentary rocks contain fossils!
Fossils can tell us about ancient plants, animals, and climates.