There is also volcanic material deposited here that presumably came from the Yellowstone area.

The protection of the Yellowstone area was Sheridan's personal crusade.

People have lived in the Yellowstone area for about 11,000 years.

Further, the tract is important winter habitat for one of the largest elk herds in greater Yellowstone area.

The average rate of movement of the plate in the Yellowstone area for the last 16.5 million years has been about 4.6 centimeters annually.

His reports of thermal activity in the Yellowstone area were considered at the time to be fictional.

The grizzly population in the greater Yellowstone area is estimated to be at least 600.

The article helped raise awareness of the Yellowstone area before it became a national park.

Live seismograms for the Yellowstone area (links to webicorders, updated every ten minutes).

Discussion of earthquakes in Yellowstone area (map and discussion).