Near Buford in Albany County, Wyoming — The American West (Mountains)

The Gangplank

Photographed by Barry Swackhamer, September 19, 2015

1. The Gangplank Marker

Inscription. The granite rocks to the west are more than a billion years old (Pre-Cambrian in age). The sedimentary rocks to the east are some 10 million years old (Late Miocene in age). After the mountains were elevated, some 20,000 feet of rocks were eroded from their crest. Later the younger sedimentary rocks were deposited against the flank of the range.
The time between the formation of the granite to the west and the deposition of the onlapping sediments to the east is measured in terms of more than ten hundred million years. You are now standing on the gangplank.

Erected by Wyoming State Parks & Cultural Resources.

Topics. This historical marker is listed in this topic list: Natural Features.

Location. 41° 5.928′ N, 105° 6.755′ W. Marker is near Buford, Wyoming, in Albany County. It is on Interstate 80 Service Road (Local Route 80) near Warren Road, on the right when traveling west. Touch for map. Marker is in this post office area: Buford WY 82052, United States of America. Touch for directions.

Regionally, this marker is in Wyoming’s Laramie Basin. It is also

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in the American Mountain West.

Globally, it is in North America,

the Rocky Mountains,

the Western Hemisphere,

the Western World,

and the Anglosphere.

Historically, it finds itself in what was once the Republic of Texas.

Other nearby markers. At least one other marker is within 11 miles of this marker, measured as the crow flies: Geology, more than rocks (approx. 10.2 miles away in Colorado).

More about this marker. This marker in the truck parking area located on the north side of Interstate 80 at the Warren Road exit (Exit 345).

Photographed by Barry Swackhamer, September 19, 2015

2. The Gangplank Marker

Credits. This page was last revised on July 26, 2025. It was originally submitted on January 10, 2016, by Barry Swackhamer of Brentwood, California. This page has been viewed 2,045 times since then and 152 times this year. Photos: 1, 2. submitted on January 10, 2016, by Barry Swackhamer of Brentwood, California.