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Lava Mountain, Wyoming
Lava Mountain, Wyoming
Lava Mountain, Wyoming
Lava Mountain, Wyoming

Lava Mountain, Wyoming.  (A) View from Dubois, WY, in the Wind River basin looking northwest ~30 km toward Lava Mountain.

Lava Mountain, Wyoming.  (A) View from Dubois, WY, in the Wind River basin looking northwest ~30 km toward Lava Mountain.

Boiling dark gray mud splashing within a small depression
Mud Pot within the Mud Volcano thermal area of Yellowstone National Park
Mud Pot within the Mud Volcano thermal area of Yellowstone National Park
Mud Pot within the Mud Volcano thermal area of Yellowstone National Park

A mud pot in the Obsidian Pool Thermal Area, near Mud Volcano. The large amounts of suspended sediment make the thermal water much more viscous than pure water. Photo by Shaul Hurwitz, September 2014.

Wind turbines in Wyoming.
Wind turbines in Wyoming.
Wind turbines in Wyoming.
Beryl Spring's boiling blue pool. Yellowstone
Blue pool of boiling water at Beryl Springs, Yellowstone National Park
Blue pool of boiling water at Beryl Springs, Yellowstone National Park
Blue pool of boiling water at Beryl Springs, Yellowstone National Park

Beryl Spring's strongly boiling blue pool is about 8 m (25 ft) wide and contains high-chloride liquid water with a near-neutral pH. Immediately behind the pool is a loud, hissing fumarole producing a white cloud of steam. USGS Photo by Pat Shanks, 2002.

Beryl Spring's strongly boiling blue pool is about 8 m (25 ft) wide and contains high-chloride liquid water with a near-neutral pH. Immediately behind the pool is a loud, hissing fumarole producing a white cloud of steam. USGS Photo by Pat Shanks, 2002.

When looking for a place to set up a capture location, biologists look for existing bear sign such as bear scat.
Bear scat.
Bear scat.
Bear scat.

When looking for a place to set up a capture location, biologists look for existing bear sign such as scratches on trees and bear scat.  Sometimes traps are set in areas that have no obvious bear sign to determine if indeed bears are present.

When looking for a place to set up a capture location, biologists look for existing bear sign such as scratches on trees and bear scat.  Sometimes traps are set in areas that have no obvious bear sign to determine if indeed bears are present.

Photo of the Old Faithful Inn lobby
Photo of the Old Faithful Inn lobby
Photo of the Old Faithful Inn lobby
Photo of the Old Faithful Inn lobby

Photo of the Old Faithful Inn lobby, which features a six-story-tall fireplace and chimney made from rocks quarried form a rhyolite lava flow in Yellowstone.  NPS photo by Jim Peaco, July 22, 2013.

Photo of the Old Faithful Inn lobby, which features a six-story-tall fireplace and chimney made from rocks quarried form a rhyolite lava flow in Yellowstone.  NPS photo by Jim Peaco, July 22, 2013.

A geyser basin and hill in the distance, with pine trees in the foreground, under a mostly cloudy sky
Image of Biscuit Basin (visible between the trees) captured by the YVO mobile webcam on June 17, 2012
Image of Biscuit Basin (visible between the trees) captured by the YVO mobile webcam on June 17, 2012
black bulbous rock sample on white tubing resting on a barren, pale, sandy surface
Sulfur “cinder” from Cinder Pool in Norris Geyser Basin, Yellowstone National Park
Sulfur “cinder” from Cinder Pool in Norris Geyser Basin, Yellowstone National Park
Sulfur “cinder” from Cinder Pool in Norris Geyser Basin, Yellowstone National Park

Sulfur “cinder” attached to a sampling tube that was extracted from Cinder Pool in Norris Geyser Basin.  The “cinder” is sulfur that existed as a molten layer at the bottom of the pool and was carried upward by gas and solidified.  The black color is due to the presence of finely dispersed pyrite.

Sulfur “cinder” attached to a sampling tube that was extracted from Cinder Pool in Norris Geyser Basin.  The “cinder” is sulfur that existed as a molten layer at the bottom of the pool and was carried upward by gas and solidified.  The black color is due to the presence of finely dispersed pyrite.

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