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
Just beyond the parking area, near the foot of the old Serpents Trail, a
road turns left to a larger parking area for the Devils Kitchen Picnic
Area, where covered tables, grills, and water are available. Just beyond
we pass the checking station and housing facilities for Monument
personnel at the East Entrance of the Monument. During the summer, fees
are collected at this checking station from persons entering the
Monument. A well just east of the housing area obtains water from the
Entrada Sandstone to supply the houses and picnic area.
[Illustration: Petroglyph]
[Illustration: DEVILS KITCHEN, looking north from ridge in middle of
No Thoroughfare Canyon. An erosional remnant of the Wingate
Sandstone capped by the lowermost sandstone of the Kayenta
Formation. Photograph by T. F. Giles, U.S. Geological Survey. (Fig.
57)]
From the East Entrance to Grand Junction
SOUTH CAMP ROAD SHORTCUT
Three fourths of a mile beyond the checking station, South Camp Road
turns left and joins South Broadway 2½ miles to the northwest. This
provides a fine shortcut for persons desirous of travelling back
northwestward through The Redlands to regain the West Entrance of the
Monument. The intersection of South Camp Road and South Broadway, a key
point on the trip “From Grand Junction through The Redlands to the West
Entrance of the Monument,” is noted on page 89.
But let us continue our 3-mile return trip to Grand Junction, in order
to point out several things of interest along Monument Road in the lower
part of No Thoroughfare Canyon. As the canyon narrows just beyond the
road intersection, we see on both sides colorful badlands of the
Morrison Formation capped by the rusty looking basal sandstones of the
Burro Canyon Formation. Behind the building on the right just before the
road curves to the left is an artesian well 575 feet deep that taps both
the Entrada Sandstone and a sandstone lens in the Morrison
Formation[40].
GAP IN ROCK RECORD
[Mile-marker 33]
About 2½ miles below the checking station, we pass on the left the basal
sandstone of the Burro Canyon Formation resting on the Morrison
Formation, as shown in the lower left of figure 24. Just beyond we may
look up the hill to the left and see the 40-foot basal conglomerate of
the Dakota Sandstone resting unconformably on an old erosion surface
atop the Burro Canyon Formation.
FLOOD DAMAGE
Public-domain text, read in full here on John Shaqi.
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