Radioactive bones in the Morrison Formation

["Simon, Robert (RISI)" <RISI@chevrontexaco.com>]

        It has long been recognized that some of the dinosaur bones in the
Morrison Formation are radioactive. I haven't seen much concerning the
degree of radioactivity and any potential health risks to excavators,
preparators or researchers. Since we test for NORM (naturally occurring
radioactive material) in some of our oil and gas wells in Louisiana, I had
some Morrison bones tested. The results were interesting and worth noting. A
bone a co-worker acquired a long time ago from Vernal, Utah near the Wonsits
Valley Oil and Gas Field recently tested 'pretty warm'. About 1200 counts
per minute and I believe 80uR/hr. Probably due to Ra226 and/or Ra228. A bone
from Colorado (bought from a dealer a long time ago) also tested warm. Bones
from Morrison sites in the Big Horn Basin, Wyoming were tested and were not
warm, only equivalent to normal background for Wyoming. It was suggested
that the bone from Vernal was 'warm' enough that after handling, hands
should be washed. 
        I wonder if studies have been done at Vernal and other places to
check the radioactivity to ensure the safety and protection of both the
workers and the public.

        Bob Simon
        ChevronTexaco