1. By: Hailey Zerkle and Marina Nava
Weathering Project
By: Hailey Zerkle and Marina Nava

2. Mechanical Weathering
Ice Wedging
Mechanical Weathering
At Bryce Canyon water in the form of ice is the most efficient form of erosion for breaking rock into smaller pieces. The area receives approximately 100 inches of snowfall a year. It also experiences about 200 days of freeze/ thaw. Which means that everyday a small amount of snow melts and runs into the joints and freezes at night. When water freezes it expands to form an ice wedge in the joint widening the space. As the ice wedge grows by more water leaking into the joint and freezing it will finally break the rock.

3. http://science. nationalgeographic
Arizona Rock Formation
Photograph by Melissa Farlow
Winds sweeping through the Grand Canyon have eroded this sandstone outcrop into an anvil shape. Wind shapes these fantastical forms by eroding less dense rock, like sandstone, faster than surrounding rock.
Wind Abrasion
Mechanical Weathering - The wind blows sediments against a rock it breaks it down.

4. Water Abrasion Zion National Park, UT
Mechanical Weathering – The water bumps against the rocks and picks up sediment taking them with it.

5. Gravity Abrasion
Mechanical Weathering – Many rocks tumble down a hill together, bumping and grinding.

6. Mechanical Weathering –
Plant Roots
Mechanical Weathering –

7. Mechanical Weathering – Animals burrow in the ground and form a hole.
Animal Burrowing
Mechanical Weathering – Animals burrow in the ground and form a hole.

8. Effects of Acid Rain
Chemical Weathering

9. Chemical Weathering when iron and oxygen mix
Sedona, AZ
Oxidation/Rusting
Chemical Weathering when iron and oxygen mix
The deep red color for which Sedona is famous is due to the presence of hematite (iron oxide, otherwise known as rust) that stains the sandstone. 

10. Acid in Living Things (Lichens)
Chemical Weathering the Lichens release a week acid in the air.

11. Bonus: Strata

12. Bonus