Remote canyon accessible only by boat. Upslope is mixed hemlock hardwood. Cobblezone downstream has sycamore / dogbane woodland. Upstream is Collesium Rapids/;Sunny exposure of scoured sandstone bedrock in a near continuous rapid reach of large high-gradient river. Bedrock has close to horizontal bedding with rounded tops. Flooded by high water events. Vegetation is confined to a few herbs, scattared bryophytes, and high cover and diversity of lichens, with mosses in moist microsites.
Representativeness
Entire exposure of bedrock on river left below rapids.