The Geologic Story of Colorado National Monument: Revised EditionLohman, Stanley William
Science
The Geologic Story of Colorado National Monument: Revised Edition
Lohman, Stanley William
Colorado National Monument (Colo.); Geology -- Colorado -- Colorado National Monument
An interesting Late Jurassic vertebrate fossil locality in the Salt Wash
Member of the Morrison Formation, about 3 miles northwest of the West
Entrance of the Monument and about 3 miles southwest of Fruita, was
discovered in June 1975 by George Callison, Associate Professor of
Biology and Research Associate in Vertebrate Paleontology at the
California State University at Long Beach. During the summers of 1975
and 1976 Dr. Callison and his assistants removed the closely associated
skeletal remains of many small, primitive mammals and both small and
large dinosaurs and other reptiles. Part of the results were presented
in an unpublished manuscript.[28] During the summer of 1977 and later,
additional mammalian fossils were removed by Callison and assistants and
additional reptilian fossils were removed by Lance Erickson,
paleontologist of the Historical Museum and Institute of Western
Colorado (fig. 2). Hopefully, the work will be continued with the aid of
grants from several sources.
[Illustration: EXCAVATING TYPE SPECIMEN OF _BRACHIOSAURUS
ALTITHORAX_ RIGGS from south side of Riggs Hill. Photograph taken in
1900, reproduced by permission of the Field Museum of Natural
History (Chicago). See also figure 39. (Fig. 22)]
The locality, which covers parts of about 180 acres of public land
administered by the Bureau of Land Management, has been fenced and
posted to discourage vandalism, and has been designated the Fruita
Paleontological Area.
In order to evaluate the importance of the locality and to make plans
for its future development and protection, the Bureau of Land Management
held the Fruita Paleontological Workshop on March 28-30, 1977, to which
were invited several renowned vertebrate paleontologists and
archaeologists together with interested local personnel of the Bureau,
the National Park Service, and the Museum. All remarks and prepared
speeches were taken down by a shorthand reporter and were reproduced for
the attendees in the 83 page unpublished “The Fruita Paleontological
Report.”
[Illustration: SKELETONS OF TYPICAL DINOSAURS OF MORRISON
FORMATION.[29] _A_, _Camptosaurus_, a small dinosaur about 11 feet
long; _B_, _Apatosaurus_, a gigantic dinosaur about 76 feet long;
_C_, _Allosaurus_, a large carnivorous dinosaur about 30 feet long;
and _D_, _Stegosaurus_, a large armored dinosaur about 24 feet long.
(Fig. 23)]
Public-domain text, read in full here on John Shaqi.
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