Charcoal collected from under the base of a pāhoehoe flow, Hawaii
Detailed Description
Charcoal collected from under the base of a pāhoehoe flow in a black sooty zone over orange ash. The black sooty zone represents the region where the vegetation was converted to charcoal. The hammer is approximately 13 inches long. USGS photo by F. Trusdell.
Sources/Usage
Public Domain.