3000 Year Old Tree

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Comments (5)

cbaisan on October 17, 2009

What is the story here Ron? Was there some radiocarbon work done on the trees? Flodded from a lava flow? or some other reason? That is some very clear water!

Cheers, Chris

Ron Cooper on October 17, 2009

Hi Chris, The lake was created when a lava flow plugged up a canyon. Cold water inundated the forest in the canyon and there are still trees from the forest standing on the lake bottom. The water stays at a constant 32 degrees farenheit year around which accounts for the remarkable degree of preservation. I don't know how the age of the trees was dated. Much of the water that flows into the lake comes from underground springs and water that has been filtered through surrounding lava beds

Area Man on October 2, 2011

The Sand Mountain lava flow that formed the lake dates to about 3,000 years ago. Carbon dating samples of drowned trees was done for the Forest Service in 1963 and determined the ages of two samples to be about 3,000 years before present. The average temperature of the lake is 43 F and the water is extremely pure.

cbaisan on October 2, 2011

Thanks for that A_M, interesting. Radiocarbon was in its infancy in 1963 - no calibration, etc. That said the date gives a ball-park idea.

Area Man on October 2, 2011

It is from an 1965 University of Oregon Article by G.T. Benson of the Geology Department. http://www.oregongeology.org/pubs/OG/OBv27n02.pdf

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Photo details

  • Uploaded on October 15, 2009
  • © All Rights Reserved
    by Ron Cooper
    • Taken on 2009/10/11 13:23:53
    • Exposure: 0.008s (1/125)
    • Focal Length: 12.00mm
    • F/Stop: f/4.000
    • ISO Speed: ISO100
    • Exposure Bias: -0.50 EV
    • No flash