The USGS Nansemond pipe extensometer.

The USGS Nansemond pipe extensometer.

Detailed Description

The USGS Nansemond pipe extensometer (59D 39) showing the triangular table in green and the instrument bridge in yellow above the extensometer. The piers that support the table extend down 65 feet. The movement of the table relative to the extensometer is how land-surface movement is measured.

Details

Image Dimensions: 4032 x 3024

Date Taken:

Location Taken: VA, US

Credits

David L. Nelms