Fall Adult Education Geology Classes

Yavapai College has an upcoming class on the Geology of Arizona's Parks & Monuments taught by Terry Steinborn and Harry Allen. Classes will be on Thursdays, 9-11 am, at the college from September 17 through October 22. There will also be a separate Edventure field trip -"The Volcanoes of Northern Arizona" to the Flagstaff area on October 23. Visit www.yc.edu/ce (class), www.yc/edu.edv (field trip) or call 717-7755 to register.

| Geologic Structures

Check out George Davis's rock collection in 3D --So that you can see all sides of the rock structure. They take a little time to load but it is almost like looking at a hand specimen.

Welcome | Geologic Structures

Harry Allen

Chinleana: Repeat Photography

Bill Parker at the Petrified Forest has an interesting set of repeat photos fron the Park. As you can see there has not been much change in the rocks since the 1920's. Erosion is slow in the high desert.


Chinleana: Repeat Photography - Charles Camp and Annie Alexander - 1921


Harry Allen

San Pedro River report presages Verde's future

The Camp Verde Bugle does a good job explaining how the San Pedro decision could effect the Water Wars for the Verde water. "Sub flow" is what the battle is all about.


CVBugle - San Pedro River report presages Verde's future

This will be used in the law suits for the Verde Waters

Harry Allen

Acid rain responsible for mass extinction at T/J boundary

Triassic/Jurassic Extinction Info. from new paper.


Stratigraphy.net internals: Acid rain responsible for mass extinction at T/J boundary


Harry Allen

Great NewTopographic Map of the World

To all Map lovers:

This is a very cool Topographic map of the World

The Most Complete Topographic Map of the World

Harry Allen

State Senator: 'Earth has lasted 6,000 years without environmental laws'

Lee Allison's post on one of our senators

Arizona Geology: State Senator: 'Earth has lasted 6,000 years without environmental laws'

Do you ever wonder how we get such great laws in Arizona???


Harry Allen ( no relation )