Site hosted by Build your free website today!

Rocks In My Head

Blog Tools
Edit your Blog
Build a Blog
RSS Feed
View Profile
« September 2010 »
1 2 3 4
5 6 7 8 9 10 11
12 13 14 15 16 17 18
19 20 21 22 23 24 25
26 27 28 29 30
Entries by Topic
All topics  «
geology et al
some days are pretty good
My own link
Rock Shop
You are not logged in. Log in
Hubbard County Geology
It frustrates me that I cannot seem to find much about the geology of my own county, but I keep looking.  Lately I've discovered that most of the rocks are from the early proterozoic, which was when the gathering up of oxygen in the earth's atmosphere took place.  It was a time of major glaciation.  Life consisted of complex single cell organisms, and some multi-celled.  Other rocks are from the late archaen, which preceded the proterozoic.  The atmosphere lacked free oxygen.  Liquid water was present.  Temperatures were close to modern day temps.  Stromatolites were present.

Posted by oh5/ojhoff at 2:52 PM CDT
Updated: 08/23/11 7:20 PM CDT
Post Comment | Permalink | Share This Post

View Latest Entries