Golden in Jefferson County, Colorado — The American Mountains (Southwest)
Bone Deposition
Photographed By Alan M. Perrie, August 25, 2018
1. Bone Deposition Marker
Inscription.
Bone Deposition. .
Dinosaur bones were deposited here on the inside of a meander by a fast-flowing stream. This deposit known as a “point bar” grew by the addition of sand, causing growth of the point bar towards the outer bank and downstream. Larger, heavier bones were deposited by a faster stream flow. Closer to the edge, the stream was slower and shallower so that the small sand grains and smaller bones were left behind. The bones are radioactive due to chemical reactions where uranium-bearing groundwater deposited uranium in the decaying bones. Follow sand layers laterally and vertically as they represent individual point bars. Note how layer 1 started out thick and pinched out as deposition migrated downstream. Looking closely, notice larger sand grains (and sometimes larger bones) at the base trending to smaller grains and no bones at the top. The numbers in the photo and the drawing correspond to the different point bar deposits. The layer marked 1 was deposited first and is the oldest of the 3 layers. .
Dinosaur bones were deposited here on the inside of a meander by a
fast-flowing stream. This deposit known as a “point bar” grew by the addition
of sand, causing growth of the point bar towards the outer bank and
downstream. Larger, heavier bones were deposited by a faster stream flow.
Closer to the edge, the stream was slower and shallower so that the small sand
grains and smaller bones were left behind. The bones are radioactive due to
chemical reactions where uranium-bearing groundwater deposited uranium
in the decaying bones.
Follow sand layers laterally and vertically as they represent individual point bars.
Note how layer 1 started out thick and pinched out as deposition migrated
downstream. Looking closely, notice larger sand grains (and sometimes larger bones)
at the base trending to smaller grains and no bones at the top.
The numbers in the photo and the drawing correspond to the different point
bar deposits. The layer marked 1 was deposited first and is the oldest of the 3 layers.
Erected by Friends of Dinosaur Ridge.
Topics. This historical marker is listed in these topic lists: Animals • Paleontology.
Location. 39° 40.777′ N, 105°
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11.793′ 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 150 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.
Also see . . . Dinosaur Ridge. (Submitted on October 18, 2018, by Alan M. Perrie of Unionville, Connecticut.)
Photographed By Jackson Perrie, August 25, 2018
2. A large Dinosaur bone deposit.
Photographed By Abigail Perrie, August 25, 2018
3. A small Dinosaur bone next to the Dinosaur Ridge Trail
Credits. This page was last revised on October 29, 2020. It was originally submitted on October 18, 2018, by Alan M. Perrie of Unionville, Connecticut. This page has been viewed 215 times since then and 14 times this year. Photos:1, 2, 3. submitted on October 18, 2018, by Alan M. Perrie of Unionville, Connecticut. • Andrew Ruppenstein was the editor who published this page.
