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Powder for seismic experiments

By Woods Hole Coastal and Marine Science Center April 2018 (approx.)
Workers wearing safety gear and hard hats pour pink powder into a hole in the dirt. another person looks on.
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Detailed Description

Contractors pour explosive powder into one of the holes where shots were detonated to provide seismic (sound) energy for the experiment. See study area map for shot locations.

Sources/Usage

Public Domain.