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Near Adamana in Apache County, Arizona — The American Mountains (Southwest)
 

Pioneers of Paleontology

Petrified Forest

— National Park Service, U.S. Department of the Interior —

 
 
Pioneers of Paleontology Marker image. Click for full size.
Photographed by Duane and Tracy Marsteller, September 25, 2025
1. Pioneers of Paleontology Marker
Inscription.
In the summer of 1921, heiress and explorer Annie Montague Alexander and her research partner Louise Kellogg set off into the badlands in front of you. Intrigued by fossils discovered by John Muir fifteen years earlier, Annie and Louise unearthed numerous specimens including phytosaurs and metoposaurs. The work of these women pioneered the science of vertebrate paleontology in Petrified Forest National Park. They were assisted by Dr. Charles Camp from the University of California's Museum of Paleontology, a museum that was founded by Alexander in 1921. Camp went on to work in the area for nearly a decade.

Since that time, research teams from organizations such as the American Museum of Natural History and the Smithsonian Institution have worked in the Blue Forest collecting fossil vertebrates. Annie Alexander's legacy lives on through the work of scientists who continue to make discoveries here about life in the Late Triassic.

[Captions:]
Charles L. Camp exploring the petrified wood deposits in 1923.

Alexander and Kellogg's campsite in the Blue Forest in 1921 (above); Skull of a reptile found by Camp (left) and the skull of an amphibian (above ).

Annie Alexander exploring badlands in 1921 in what is now Petrified Forest National
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Erected by National Park Service, U.S. Department of the Interior.
 
Topics. This historical marker is listed in these topic lists: PaleontologyWomen. A significant historical year for this entry is 1921.
 
Location. 34° 56.6′ N, 109° 46.649′ W. Marker is near Adamana, Arizona, in Apache County. It is on Petrified Forest Road 1.6 miles north of Blue Mesa Scenic Road, on the right when traveling north. It is at the Historic Blue Forest Trailhead in Petrified Forest National Park. Touch for map. Marker is in this post office area: Chambers AZ 86502, United States of America. Touch for directions.

Regionally, this marker is in the American Southwest, in the Mountain West, in Colorado Plateau, and at the Four Corners. Globally, it is in North America, the Western Hemisphere, the Western World, and the Anglosphere. Historically, it finds itself in what was once New Spain and also Mexico’s Alta California.

Other nearby markers. At least 8 other markers are within 3 miles of this marker, measured as the crow flies: A different marker also named Pioneers of Paleontology (about 600 feet away, measured in a direct line); Metoposaur Genesis Supreme (approx. 1.3 miles away); The Funky Worm (approx. 1.4 miles away); Newspaper Rock Petroglyphs Archeological District (approx. 1.8 miles away); Work of Generations (approx. 1.8 miles away); Summer Solstice Marker (approx. 2.3 miles away); A Canvas for Ideas (approx. 2.3 miles away); Roosevelt's Tree Army: The CCC (approx. 2.3 miles away). Touch for a list and map of all markers in Adamana.
 
Another marker is no longer nearby. Newspaper Rock (was approx. 1.8 miles away but has been replaced with another marker now near it).
 
Also see . . .
Pioneers of Paleontology Marker image. Click for full size.
Photographed by Duane and Tracy Marsteller, September 25, 2025
2. Pioneers of Paleontology Marker
 Annie Montague Alexander (1867-1950). In 1901 a young lady attending John C. Merriam’s lectures on paleontology at the University of California was so fascinated by his discoveries of extinct mammals and reptiles in northern California and Oregon that she offered to underwrite the costs of his summer collecting expedition if she could take part in the field work. (University of California Museum of Paleontology) (Submitted on October 15, 2025, by Duane and Tracy Marsteller of Murfreesboro, Tennessee.) 
 
 
Credits. This page was last revised on October 17, 2025. It was originally submitted on October 15, 2025, by Duane and Tracy Marsteller of Murfreesboro, Tennessee. This page has been viewed 69 times since then and 20 times this year. Photos:   1, 2. submitted on October 15, 2025, by Duane and Tracy Marsteller of Murfreesboro, Tennessee.
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Jun. 22, 2026