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

Happy "birthday," dear planet

(From the Nova Geoblog). Happy 6013th Birthday Earth.


NOVA Geoblog: Happy "birthday," dear planet

??How many of our legislators still believe in this Date is correct?? Are they having a birthday party today?

Harry Allen

'Shiva' Crater In India

Look at this giant Crater identified off India( 500 km diameter)



PALAEOBLOG: Did 'Shiva' Crater In India Doom The Dinosaurs?

Harry Allen

'Scary' climate message from past

The blog Arizona Geology had a link to this news- It is sobering if you know anyone on the coasts. So long Flordia with a rise of the sea levelof 80 to 130 feet.


BBC NEWS | Science & Environment | 'Scary' climate message from past


Harry Allen

The Big One Video

Here is a video of what could happen to California when the "Big One" goes near LA



Harry Allen