|Date:||2005 12:00 AM|
|Volcano(es):||Basalt of Gertrude Creek|
|Photographer/Creator:||U.S. Geological Survey; BigTopo 7|
This website is supported by the U.S. Geological Survey under Cooperative Agreement Grant G22AC00137
Mention of trade names or commercial products does not constitute their endorsement by the U.S. Geological Survey.