The Absaroka Volcanics are features of the Eocene. Those who have studied the region have divided the rocks into formations and groups all with estimated occurances within the Eocene. There are intrusive and extrusive rocks that make up the Absarokas. There is evidence of lava flows, mudflows(lahars), dikes, sills, and stocks, as well as a range of tuffs and brecciated volcanoclastics. The composition of the rocks range from andesitic to rhyodacitic to dacitic.
The most interesting thing about the Absaroka
Volcanics is that they are concentrated in the
Absaroka Range. As was stated earlier, they are
quite extensive, but nowhere are they in such high
concentration as in the Range. This brings the
question of how they arrived to where they are.
Others have engaged in the same type of speculation
when attempting to understand the Heart mt fault
blocks. Some have gone as far as to say that the
volcanics are actual Heart mt blocks as well, ones
that have been transported along with the
mid-Paleozoic blocks. To read about the evidence
that I discovered in the field, and the conclusions
at which I have drawn as a result of my field work,
click here.
