The park has thousands of these. Dr. Hartley said, “We’ve documented approximately 300 in the northern sector, but there are certainly more we’ve never cataloged, particularly in the drainage channels where the rock formations create cavities.”
The comparison between the topographic features visible in the first recovered image, the angle of the river corridor below, the specific configuration of the riolyte outcroppings in the middle ground, the elevation relative to the valley floor, and the park’s highresolution LAR survey data conducted by the NPS in 2021 as part of its backcountry hazard assessment program allowed Dr.
Hartley and a GIS specialist from the USGS to narrow the probable photography location to a search zone of approximately 0.4 square kilmters on the western face of a riolyte ridge 2.1 mi south of Tower Junction.
This area was within a/4 mile of the location where the camera bag had been found.Browse Reference
