half a dozen isolated outcrops located about 50 miles south of
the Grand Canyon that we explored, two of them were richly fossiliferous.
The first site - The "SW" locality contained an abundant
but low diversity collection of fossils in the green shales.
A nearby hill graded from green shale at the base, to grey Muav
Limesone, and this was found only to contain a few trace fossils.
The second locality, here designated as the "IH" Locality
was an isolated ridge out in the middle of nowhere that had a
basal Tapeats Sandstone bed loaded with Lower Middle Cambrian
trace fossils, overlain by a brown and grey sequence of shales.
The top of the ridge was limestone beds that were literally made
of trilobite hash. Finally a cap rock of a darker dolomitic mudstone
preserved the ridge from erosion over the millenia.|