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MARKER DATABASE
“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”
Yellowstone National Park in Park County, Wyoming — The American West (Mountains)
 

Upper Falls of the Yellowstone River

 
 
Upper Falls of the Yellowstone River Marker image. Click for full size.
By Bernard Fisher, July 25, 2011
1. Upper Falls of the Yellowstone River Marker
Inscription. A waterfall is a clue that you are standing on a geologic crossroads.

A waterfall forms in a river channel where harder rocks meet softer rocks that erode more easily and quickly. Here, volcanic and hydrothermal activity have created the 109-foot (33 m) Upper falls.

Why here?

1 About 480,000 years ago, lava formed a layer of rock that resists erosion. The lava naturally cracks in a zig-zag pattern.

2 Over time, hydrothermal springs rose through some of these cracks, altering and weakening the lava.

3 The Yellowstone River flowed through the zig-zag cracks and eroded its river channel. Once the river reached the softer, hydrothermally-altered rock, erosion increased and created the Upper Falls.
 
Location. 44° 42.847′ N, 110° 29.88′ W. Marker is in Yellowstone National Park, Wyoming, in Park County. Marker can be reached from South Rim Drive 0.6 miles east of Grand Loop Road. Touch for map. Marker is in this post office area: Yellowstone National Park WY 82190, United States of America.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. Uncle Tomís Point (about 600 feet away, measured in a direct line); Brink of Upper Falls (about 700 feet away); Uncle Tomís Trail
Upper Falls Viewpoint image. Click for full size.
By Bernard Fisher, July 25, 2011
2. Upper Falls Viewpoint
(approx. 0.2 miles away); Brink of Lower Falls (approx. 0.4 miles away); Still Venting After All These Years (approx. 0.4 miles away); Chittenden Memorial Bridge (approx. half a mile away); Waterfall Makers (approx. 0.7 miles away); Lookout Point (approx. 0.7 miles away). Touch for a list and map of all markers in Yellowstone National Park.
 
Also see . . .  Yellowstone National Park. (Submitted on July 30, 2011, by Bernard Fisher of Mechanicsville, Virginia.)
 
Categories. Natural Features
 
Upper Falls of the Yellowstone River Marker image. Click for full size.
By Bill Coughlin, 44į 42.847
3. Upper Falls of the Yellowstone River Marker
Upper Falls of the Yellowstone River image. Click for full size.
By Bernard Fisher, July 25, 2011
4. Upper Falls of the Yellowstone River
Upper Falls of the Yellowstone River image. Click for full size.
By Bill Coughlin, July 31, 2015
5. Upper Falls of the Yellowstone River
 
 
Credits. This page was last revised on June 16, 2016. This page originally submitted on July 30, 2011, by Bernard Fisher of Mechanicsville, Virginia. This page has been viewed 447 times since then and 42 times this year. Photos:   1, 2. submitted on July 30, 2011, by Bernard Fisher of Mechanicsville, Virginia.   3. submitted on September 9, 2015, by Bill Coughlin of North Arlington, New Jersey.   4. submitted on July 30, 2011, by Bernard Fisher of Mechanicsville, Virginia.   5. submitted on September 9, 2015, by Bill Coughlin of North Arlington, New Jersey.
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