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Chemical/temperature sensor on the floor of Yellowstone Lake

By Yellowstone Volcano Observatory August 2018 (approx.)
Chemical/temperature sensor on the floor of Yellowstone Lake
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Detailed Description

Sensor (left) and battery/electronics package (right) at vent location A in the Deep Hole area of Yellowstone Lake.  Photo was taken immediately before recovery from the lake floor. Notice the battery/electronics package slightly submerged in sediment.

Sources/Usage

Public Domain.