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Post by jakesrocks on Mar 10, 2011 12:27:10 GMT -5
They formed in a very shallow inland lake or sea, in a desert area. Very little water flow or wave action. There have been many theories about how they formed, but none seem to be plausible. This one has the "experts" stumped.
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Post by jakesrocks on Mar 10, 2011 15:03:24 GMT -5
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elementary
fully equipped rock polisher
Member since February 2006
Posts: 1,077
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Post by elementary on Mar 11, 2011 10:08:53 GMT -5
Thanks for sharing. I've heard about these things, but never had I taken a peak at any specimens very closely. They are interesting.
Shallow water, pointing in one direction? Hmmmm. Hypothesis.... Round concretion forms first. Water/current starts flowing a certain direction. Sand erodes from concretion but slowly forms a tail behind the original blob. That's why some blobs have no lump at top, it's all been eroded down the spike/tail, like the tail of a comet...
I'm wondering if the chemical composition in the concretion is slightly different than the surrounding sand it was found in.
Or, for people who don't believe humans built the pyramids or scratched out the Nazca lines, these concretions are the portapotty runoff from alien spacecraft...
Thanks for the mystery!
Lowell
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Post by jakesrocks on Mar 11, 2011 10:26:53 GMT -5
;D ;D I like the portapotty idea. lol
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