United States, Nevada, Pershing County, Humboldt Range, Black Canyon, obvious black-stained vertical wash in steep tall cliff north of road ~100 m past switchback (~600 m past fork)
40.5419 -118.2035 +-5m.
2035 meters (6675ft)
vertical black-stained drainage channel in tall south-facing rhyolite cliff; _Artemisia_, desert scrub and scattered junipers
vertical granite in drainage channel weakly HCl+
cortex lacking, lobes to ~4mm wide undulating concave with thin margins to ~300um thick, medulla loose prosoplect, algae chains of Nostoc, lower surface smooth to finely wrinkly gray to greenish, isidia globose to globular abundant, apothecia not present