GPS benchmark installation just below crater of Mount St. Helens.

GPS benchmark installation just below crater of Mount St. Helens....

Detailed Description

Epoxy is used to cement a permanent survey marker at a field location just below the crater of Mount St. Helens (north flank). The benchmark is used to create a fixed location for future GPS surveys.

Details

Image Dimensions: 900 x 678

Date Taken:

Location Taken: US