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Cosmic rays and the estimation of paleo-elevation



Does anyone know if extant high-elevation animals (say, Mountain Goats)
contain more C14 in their bodies than do extant low-elevation animals
(such as domestic sheep)?

And:

Are there any *stable* cosmic-ray-formed isotopes that might be present
in fossil bone?  For instance, archaeologists sometimes use lichens to
date rock surfaces.  Following that rationale, could isotopic ratios be
used to determine if a rock's surface was exposed to a high-elevation
environment (with more cosmic rays)?

I'm thinking about conglomerates.

<pb>
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