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“Bite-Size Bits of Local, National, and Global History”
“Bite-Size Bits of Local, National, and Global History”

Golden in Jefferson County, Colorado — The American Mountains (Southwest)
 

Theropod Track

 
 
Theropod Track Marker image. Click for full size.
By Jackson Perrie, August 25, 2018
1. Theropod Track Marker
Inscription.  
First noted by Matt Mossbrucker and later described by Dr. Martin Lockley, this theropod (a carnivorous dinosaur) track was part of the top layer of sandstone at the Bone Site, 50 yards to the north. During road construction in 1937, this boulder was removed from the hillside and later moved to this location in 2013.
The sharp toe impressions show that this was a theropod. Since Allosaurus teeth and bones were found here in 1877, this footprint may be from a young Allosaurus. Other possibilities include Torvosaurus or Ceratosaurus.

From the footprint, one can determine the animal’s size. Multiply the length of the footprint (9 inches) by 5 to get the leg length (45 inches). For a Jurassic theropod, multiply the leg length by 3 to get the theropod’s head to tail length.

45 inches x 3 = 135 inches or 11.5 feet

The theropod that left this footprint would have been 11.5 feet long.

 
Topics. This historical marker is listed in these topic lists: AnimalsPaleontology.
 
Location. 39° 40.732′ N, 105° 
A young Allosaurus 9 inch footprint. image. Click for full size.
By Abigail Perrie, August 25, 2018
2. A young Allosaurus 9 inch footprint.
11.718′ W. Marker is in Golden, Colorado, in Jefferson County. The marker is on the Dinosaur Ridge Trail which is a 1.1 mile wide paved section of West Alameda Parkway that is closed to traffic. This marker is found 200 yards southeast of the parking area located at the junction of 93 (Hog Back Road) & West Alameda Parkway. This Trail has 15 unique dinosaur and geologic features. Touch for map. Marker is in this post office area: Golden CO 80401, United States of America. Touch for directions.
 
Other nearby markers. At least 8 other markers are within walking distance of this marker. Late Jurassic Time (within shouting distance of this marker); Morrison Fossil Area (within shouting distance of this marker); Rock Deformation (within shouting distance of this marker); Brontosaur Bulges (about 300 feet away, measured in a direct line); The Rocky Mountains (about 400 feet away); Bone Deposition (about 400 feet away); West Alameda Parkway / Dinosaur Ridge (about 500 feet away); Volcanic Ash (about 500 feet away). Touch for a list and map of all markers in Golden.
 
Also see . . .
1. Torvosaurus. (Submitted on October 19, 2018, by Alan M. Perrie of Unionville, Connecticut.)
2. Ceratosaurus. (Submitted on October 19, 2018, by Alan M. Perrie of Unionville, Connecticut.)
3. Theropod. (Submitted on October 19, 2018, by Alan M. Perrie of Unionville, Connecticut.)
 
 
Credits. This page was last revised on October 21, 2018. It was originally submitted on October 19, 2018, by Alan M. Perrie of Unionville, Connecticut. This page has been viewed 81 times since then. Photos:   1, 2. submitted on October 19, 2018, by Alan M. Perrie of Unionville, Connecticut. • Andrew Ruppenstein was the editor who published this page.
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Jan. 24, 2021