Geology Story of the Verde formation

Steve Ayres of the Verde News wrote a good overview of those White rocks in the Verde Valley


geology story

Harry Allen

End of the BIF's

Another article on what could have been the cause of the end the Banded Iron Formation Deposition about 1.85 Billion years ago.



Giant Asteroid Impact Could Have Stirred Entire Ocean | Wired Science | Wired.com

Harry Allen

Banded Iron Formations:

a "new" BIF depositional model:

Banded Iron Formations: Interaction of Air, Water and Rocks


Some thoughts on how our BIFs got here.

Metamorphic Rocks Class change

Hard Rock Fans take note:

Terry Steinborn's Metamorphic Rocks class At Yavapai Community Ed has been changed to the SpringII Session (April-May). It was going to be given in the SpringI session.

Harry Allen