bigtiller
Super Member
- Joined
- Feb 1, 2006
- Messages
- 6,452
- Location
- central Iowa
- Tractor
- John Deere 2720 John Deere 3039R John Deere Z545R
oosik, very interesting, thanks.
There are bunches of boulders in Portland Or they tell me were moved there by the same process.Bigtiller - the rock type - basaltic lava. They are round because they have been caught up in one of the great out washes from Ancient Lake Missoula.
REALLY ancient history. 15,000 to 13,000 years ago. A monstrous big lake formed in northwestern Montana. Held back by a large ice dam. The water would eventually break thru this ice dam and flood across Idaho, WA & OR. It's what created the geography of a lot of these three states. My property is at the northern limits of what is called The Channeled Scablands.
Ancient LK Missoula burst thru this ice dam an estimated 40 times in the 2000 years. The flow was estimated to ten times the flow of all the rivers in the entire world. It has left some most interesting geography in these three states.
It is what definitely carved out my little lake. Five acres of open water - five acres of cattails. 80 feet deep down the center - 45 feet deep where the water meets the basaltic lava cliffs. A view off my front porch. View attachment 700573
You can also find the Huge ones that were left when the glaciers retreated.There are bunches of boulders in Portland Or they tell me were moved there by the same process.
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