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The Mary Bay crater, the bay with small ponds behind it in this picture.

The Mary Bay crater, the bay with small ponds behind it in this picture.
The Mary Bay crater, the bay with small ponds behind it in this picture.
The Mary Bay crater, the bay with small ponds behind it in this picture.
The Mary Bay crater, the bay with small ponds behind it in this picture.
Geolocation data
(44°41′13″N, 110°33′22″W)
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423563
Linder, Chris
The Mary Bay crater, the bay with small ponds behind it in this picture.
Still Image
09/19/2016
graphics/Linder_HD-YLAKE/cl_20160822073345.jpg
Caption from Oceanus magazine, Vol. 52, No. 2, pg. 55:
Yellowstone Lake is the largest freshwater lake above 7,000 feet in North America, with more than 110 miles of shoreline. Its northern half lies in the geothermally active Yellowstone Caldera. The lake has the worlds largest collection of craters that form from hydrothermal explosions, which occur at the lake bottom. Researchers brought tools normally used to measure the deep oceans to explore what is happening at the bottom of this deep lake.
Caption from expedition blog:
If the pressure suddenly drops on a large quantity of near-boiling water, the liquid flashes to steam, causing a steam explosion. Yellowstone Lake hosts the world's largest collection of hydrothermal explosion craters, including the Mary Bay crater (the bay with small ponds behind it in this picture), which is about 1-1/2 miles in diamter and over 350 feet deep. Aerial support provided by LightHawk. Work was completed under an authorized Yellowstone Research Permit.
Photo by Chris Linder
© Woods Hole Oceanographic Institution
http://hdylake.org/
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