Friable Gunsight Butte Member sandstone makes hand-imprinting plausible
Claim about Kodachrome Basin Handprints · Stance: supporting
The wall rock is identified as the Gunsight Butte Member of the Jurassic Entrada Sandstone, described as fine-grained, weakly calcite-cemented, and unusually friable.
Site
- Kodachrome Basin Handprints Cannonville, Utah, United States
Evidence for and against
- USGS Geolex: Gunsight Butte Member (Entrada Sandstone) definition
Other claims about Kodachrome Basin Handprints
- The age and authorship of the handprints are not established
- Alternative hypothesis: the handprints are ancient Indigenous ritual marks (disputed)
- A Panorama Trail shelter contains more than 100 hand-shaped grooves
- Alternative hypothesis: some ‘handprints’ could be natural cavities later emphasized (disputed)
- The grooves are described as petrosomatoglyphs formed by repeated hand-rubbing
- Management tension: access vs preservation for a touch-sensitive site
- Kodachrome’s sandstone ‘pipes/spires’ have competing origin explanations
- Trail erosion and shifting ground level complicate contextual inference
- Modern visitors are likely deepening at least some grooves