1. California Resources: GypsumBy
John Doe
Rowland High School
Earth Science - Period 3 - Ms. Holl
October 17, 2005

2. What is gypsum? A mineral and a sedimentary rock
Found in thick layers after salt water evaporates
It is a SULFATE - made of oxygen and sulfur (CaSO4.2H2O)
Very soft - 2 on Mohs' hardness scale
A fingernail can easily scratch it

3. Pictures of Gypsum

4. Who uses gypsum? Builders - Cement, drywall, and plaster
Dentists - Making molds of of teeth
Doctors - Surgical casts
You and Me - Toothpaste
Artists and Metal workers - “Plaster of Paris”, Gesso, molds
Farmers - add to soil
Chefs - Makes tofu firm!!

5. Where is gypsum found in California?
Colorado Desert
Imperial Valley
In a deep crack between plates!

6. Resources Used for this Presentation

7. The End
Any questions?