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
As we continue westward on South Broadway, note on the right the
brightly colored mudstone and siltstone of the Brushy Basin Member of
the Morrison Formation strewn with large blocks of rusty-looking
sandstone from the Burro Canyon Formation, which caps the high ridge on
the right. Just above the deep cut on the right four-tenths of a mile
west of the intersection with South Camp Road is a bronze plaque set in
a masonry monument, whose lettering is easily readable in figure 39.
Many years after the excavation in 1900 (fig. 22), Elmer Riggs contacted
Al Look, of Grand Junction, in regard to the casting and erection of
this plaque. Al, Elmer, Ed Faber, and a few other citizens put up the
necessary funds and personally erected the plaque and monument. Somehow
or other, _Brachiosaurus_ was misspelled _Brachyosaurus_, as shown in
figure 39, but the intentions were good. Later I will call attention to
another similar monument commemorating the finding by Riggs of another
dinosaur skeleton.
[Illustration: CLOSEUP OF UPDRAGGED WINGATE SANDSTONE ALONG REDLANDS
FAULT, looking northwest from side road 1½ miles southwest of
intersection of South Camp Road and South Broadway. White “pimple”
atop cliff near left skyline is Liberty Cap, an erosional remnant of
the Wingate Sandstone, reachable via the Liberty Cap Trail (fig. 3;
and p. 108). Chinle Formation here was largely squeezed out along
the fault. (Fig. 38)]
WATCH TURNS
After a sharp turn to the north and another to the west, South Broadway
reaches the top of a hill just above the Elk’s Club and curves gently to
the right past sandstone lenses in the Salt Wash Member of the Morrison
Formation. A 610-foot-deep well at the house on the left formerly flowed
about 1½ gallons a minute from the Entrada and Wingate Sandstones.
[Illustration: BRONZE PLAQUE AND MONUMENT MARKING THE DISCOVERY OF
_BRACHIOSAURUS ALTITHORAX_ RIGGS, above roadcut on South Broadway
four-tenths of a mile west of South Camp Road. See also figure 22.
For discrepancy in spelling text. (Fig. 39)]
LEFT TURN
WATCH FOR BUFFALO
[Mile-marker 6]
Public-domain text, read in full here on John Shaqi.
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