Random question - are there any walls in the wasatch with routes on marble? I investigated the obvious outcrop of the rock in big cottonwood (around mile 9) and it seems like it would be real fun to climb.
Kyler R- Do you know what marble is? Allow me to help. It is limestone that has been altered by heat and or pressure- i.e. metamorphosed. The hell gate area is full of it. Look at the main hellgate wall/cliff from the LCC highway- its completely altered- see those giant swirls and streaks? This alteration even creates the "flakey" attributes. This limestone was altered mainly by the intrusion of the "alta stock"- what we climbers know as the quartz monzonite that we love and call LCC granite. Altered mississippian limestone = mississippian marble. Check a geologic map.
Also I'm fairly certain Bret Ruckman Studied geology too... this route name is not an accident: