Today’s deskcrop comes from a small knob that may no longer exist. The sample consists of drusy quartz that fills vugs in the Mississippian Leadville Limestone. The vugs were formed when the Leadville Limestone was exposed to surface weathering and developed a karst topography. The hill from which this sample was collected is thought to have been a paleokarst tower. Unfortunately, when I last visited the locality a few summers ago it was on the verge of being blasted away to make room for a campsite.
Opposite Side of the Knob, Where the Molas Lake Formation Redbeds Overly the Leadville Limestone
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