|
Geological Survey Bulletin 1508
The Geologic Story of Colorado National Monument
|
TRIPS THROUGH AND AROUND
THE MONUMENT(continued)
Through the Monument from West to East Entrances
WEST ENTRANCE 10 REDLANDS VIEW |
AFTER TURNING SOUTH on Rim Rock Drive from the
intersection with Colorado Highway
340 (Broadway), we cross the Monument's
northern boundary and reach the checking
station at the West Entrance, where a small entry fee is
charged during the summer. At the first left turn we are in red
beds of the Chinle Formation, then in sheared and broken beds
of the Wingate Sandstone along the Kodels Canyon fault. At
the easternmost loop of the road we may look southeastward
across Lizard Canyon to the Lizard Canyon monocline (fig. 30),
and if we look down the slope to the east we will see one of John
Otto's well-built trails that formerly ascended the west side of
Lizard Canyon to what is now the campground, long before
Rim Rock Drive was built. Do not try to stop at the curve,
however; play it safe, drive on, and park at Redlands View a
quarter of a mile west.
By walking about 50 feet north of the turnout, we get
an excellent view to the west of the Kodels Canyon fault, as shown in
figure 31. Just to the north of the fault are the sheared and broken
beds of the Wingate Sandstone along the east end of this fault.
|
NEW EARTHFILL |
Just beyond the turnout the road curves left through
a cut in the Wingate Sandstone and ascends the east side of Fruita
Canyon. About a quarter of a mile from the
parking area we get a good view (fig. 44) to the west of the new
earthfill on Rim Rock Drive between the two tunnels. The original fill
was washed out in a few minutes on August 8, 1968, by a cloudburst that
dumped an estimated 4 inches of rain on
the mesa west of Fruita Canyon. A culvert beneath the road just north of
the north tunnel was wholly unable to cope with the resulting flood,
part of which plunged over the cliff but most of which roared southward
through the tunnel. According to the only known eyewitnessesa
couple from Ohio whose car was stalled in 18 inches of swift water in
the lower tunnelan estimated 4 feet of water flowing through the
north tunnel soon separated the two tunnels by a gaping chasm and flowed
down where the fill had been but moments earlier. They jockeyed their
car back and forth in the south tunnel and retraced the route back
toward Fruita. Later I viewed the chasm from the portal of the north
tunnel and found it awesome indeed.
|
NEW FILL ON RIM ROCK DRIVE BETWEEN TWO TUNNELS ON WEST SIDE
OF FRUITA CANYON, looking west from east side of canyon. Previous fill
was washed out by flash flood, as described in text. (Fig. 44)
|
The road remained closed for 1-1/2 years until
December 20, 1969, much to the annoyance and discomfort of both visitors
and Monument personnelparticularly the latter. During the summer,
the usual 16-mile daily round trip to the post office in Fruita via the
West Entrance was increased to about 80 miles by way of the East
Entrance. During the school season, wives of Monument personnel took
turns driving a station wagon full of children on two daily round trips
to the schools and post office in Fruita. Note in figure 44, taken only
6-1/2 years after the road was reopened, that small gullies already have
been cut in the lower half of the new fill. Another local cloudburst
could remove the new fill, but let us hope this does not happen!
On the next curve to the east the road cuts entirely
through the red Chinle Formation, which here has a measured thickness
of 103 feet.32 From the base of the Chinle to about the creek
crossing the road cuts expose the old Proterozoic metamorphic rocks,
which here have a purple hue.
32Lohman, 1965a, p. 22.
|
11 BALANCED ROCK |
At the southernmost loop of the road is a
parking area viewing Balanced Rock. The photograph for the
frontispiece was taken from the hillside near the foot of the
monolith.
|
12 HISTORIC TRAILS VIEW 13 FRUITA CANYON VIEW |
After the road turns north, we again cross the entire
Chinle Formation, then penetrate the Wingate Sandstone through the two
tunnels (turn on your lights) shown on all the maps and in
figures 33 and 44. Just beyond the highest
tunnel (turn off your lights) we reach Historic Trails View, with a sign noting
the early expeditions that traversed the area. West from the
parking area, but better yet by walking to the westernmost
curve, may be seen the northern part of the Black Ridge Trail.
This foot trail is part of the old stock trail over which sheep
and cattle once were driven down to the Grand Valley
from Glade Park and Piñon Mesa. The road then winds upward through a
series of switchbacks cut into the Kayenta Formation to Distant View
and then to a parking spot at the relatively new Fruita Canyon View,
which affords a splendid view of Fruita Canyon. Figure 45 was taken from
a point about a tenth of a mile to the east. On the right are housing
facilities for Monument personnel.
|
FRUITA CANYON, looking northeast from point on Rim
Rock Drive above head of canyon. Dark Proterozoic rocks floor the
canyon, above which are the slopes of the red Chinle Formation and the
cliffs of Wingate Sandstone capped by the lower resistant beds of the
Kayenta Formation. Beyond the Grand Valley are the dark Book Cliffs and
the more distant, light-colored Roan Cliffs, which are shown more
clearly in figure 48. (Fig. 45)
|
|
14 CAMPGROUND AND PICNIC AREA |
At the top of the hill just beyond the head of Fruita
Canyon, two roads turn left; the first makes several loops through the
modern campground and picnic area then returns to Rim Rock Drive; the
second enters a large parking lot at the Visitor Center. Let us take the
first road, then turn sharp to the left again just west of the
Saddlehorn and explore the camp and picnic areas, which are on a gently
sloping mesa of the Kayenta Formation dotted with piñon and juniper
trees and bushes of many kinds. The Saddlehorn is an erosional remnant
of the Entrada Sandstone. (See fig. 50.) The deluxe campground has both
drive-through and back-in campsites, modern restrooms, tables, piped
water, and grills. Two of the drive-through sites on the northernmost
loop are shown in figure 46.
|
CAMPSITES AT NORTH END OF CAMPGROUND, Grand Valley and Book
Cliffs beyond. (Fig. 46)
|
A view of the picnic area and parking lot is shown in figure
47. During the summer, evening slide talks are given by
rangers at a small amphitheater just north of the Saddlehorn
and to the left of the view shown in figure 47.
|
PICNIC AREA AND PARKING LOT, looking northeast from top of the
Saddlehorn.
Large groups can be accomodated by making advance reservations.
Cliff of Wingate Sandstone on right across Monument Canyon is part of
Lizard Canyon monocline. (See fig. 29.) (Fig. 47)
|
|
WINDOW ROCK |
An interesting quarter-of-a-mile self-guiding Window Rock
Nature Trail leads from the northeast corner of the campground
to Window Rock and loops back past Book Cliffs View,
which contains a table beneath a ramada. Window Rock Trail
connects with the scenic Canyon Rim Trail, which leads southwestward
to the Visitor Center. Views of Window Rock and
Monument Canyon from Canyon Rim Trail are shown in
figures 48 and 49.
|
WINDOW ROCK, a window eroded along a vertical joint
near the top of the Wingate Sandstone. Telephoto view looking northeast
from Canyon Rim Trail. Note fenced overlook on Kayenta Formation to left
of window to keep people from crossing joint above window, for someday
the monolith to the right will fall, as did Fallen Rock (fig. 35). Note
light-colored Roan Cliffs of Green River Formation beyond Book Cliffs.
(Fig. 48)
|
|
PIPE ORGAN, looking southeast across Monument Canyon from
Canyon Rim Trail, and Independence Monument to left beyond. Photograph by Darrell
Arnold, Grand Junction. (Fig. 49)
|
|
VISITOR CENTER MONUMENT HEADQUARTERS |
After we return to Rim Rock Drive, a double left turn brings
us to a large parking lot. We are now at the Visitor Center and
Monument Headquarters, which is well worth a visit. In the
front of the building are modern restrooms and a drinking
fountain. Inside the lobby may be purchased film, slides, post cards,
maps, booklets, and reports. A narrated slide show and museum help
materially in conveying just what the Monument
has to offer. I was pleased at being asked to
contribute several of the geologic exhibits, partly with the aid of
former Survey artist John R. Stacy. From the back door a path leads to a
fenced overlook for viewing an arm of Monument Canyon. The overlook also
is the beginning of Canyon Rim Trail which connects about half a mile
to the northeast with Window Rock Trail at Book Cliff View.
|
15 GAP IN ROCK RECORD |
Half a mile southwest of the parking lot is one of
the narrowest stretches of Rim Rock Drive at the edge of a Wingate
cliff that actually overhangs. But do not worry, it is well protected
by a rock wall. At the head of the canyon is a large jumbled landslide
of the Morrison Formation that has covered the cliff of Entrada Sandstone. Along the
narrow stretch and just beyond the landslide are excellent views on
the right of the erosional unconformity between the eroded
surface of the Kayenta Formation and the overlying Slick Rock Member
of the Entrada Sandstone, a view of which is shown in
figure 15 and a discussion of which is given on pages 35 to
39.
|
16 PIPE ORGAN |
From the next parking area to the northeast at
Pipe Organ Overlook we may hike half a mile over Otto's Trail to
an overlook of the Pipe Organ; a view of the Pipe Organ
from the northwest is shown in figure 49. From about the middle of this trail we
may look to the northwest across the canyon to the Visitor Center and
the Saddlehorn (fig. 50).
|
VISITOR CENTER AND THE SADDLEHORN, looking northwest across
canyon from Otto's Trail. Note thin-bedded bench of the Kayenta Formation separating
cliffs of the Entrada Sandstone above the Wingate Sandstone below. The
Saddlehorn is the remnant of the Entrada at the extreme right. (Fig.
50)
|
|
17 INDEPENDENCE VIEW |
At the next parking area at Independence View we see
Independence Monument (fig. 51) from quite a different angle
than the photograph shown in figure 6. This view clearly shows it to be
a thin erosional remnant of a narrow wall that once connected mesas to
the northeast and southwest and which separated the two entrances of
Monument Canyon.
|
INDEPENDENCE MONUMENT, looking northeast from
Independence View. Note updragged block of Wingate Sandstone at
northwestern end of Redlands fault, just to the right of center. The
other side of this block is shown in figure 41. Grand Mesa forms right
skyline. (Fig. 51)
|
|
18 GRAND VIEW |
Grand View, six-tenths of a mile farther southeast, affords
excellent views of several features in and near Monument Canyon.
A short improved trail to the northeast leads to a sandstone
ledge from which the infrared photograph for the front
cover was taken. The trail then veers eastward to a fenced cliff-top
viewpoint from which one may look nearly straight down
to a stretch of Monument Canyon Trail. You may see hikers on
the trail or buffalo in the canyon. The photograph for figure 6
was taken from a point just north of the north end of the parking area.
|
19 MONUMENT CANYON VIEW |
Another 1-1/3 miles takes us to the next parking area at
Monument Canyon View, from which one may walk a short
distance to the northeast. The photograph shown in figure 13 was taken
from a point northeast of the parking area.
From the head of Fruita Canyon to Monument Canyon
View, Rim Rock Drive is on a bench of the Kayenta Formation that
separates the two lines of cliffs. We must now leave this bench,
however, because from near Coke Ovens Overlook to beyond Artists Point
the bench ceases to exist, and the Entrada, Kayenta, and Wingate form
virtually a single cliff. Moreover, we must get up into the Morrison
Formation in order to cross the divide between Monument and Ute
Canyons. For these reasons, in the next three-quarters of a mile south
of Monument Canyon View the road cuts upward through the entire Entrada
Sandstone. Just beyond the first curve are quarries on the right from
which curb and building stones were cut by the Civilian Conservation
Corps in the 1930's for protecting overlooks and narrow stretches of
road. At the southwest end
of this stretch is another parking area at Coke Ovens Overlook,
which provides good views of the north side of the Coke
Ovens.
|
20 COKE OVENS OVERLOOK |
The next parking area a quarter of a mile to the southwest is the
Monument Canyon Trailhead of the long trail to the mouth of Monument
Canyon and of a short trail to the Coke Ovens.
|
21 ARTISTS POINT |
Half a mile to the southeast takes us to a large parking area
at Artists Point, which offers a wide variety of scenic views.
The best exposure of the Summerville Formation in the entire
area that I mapped33 is on the west side
of the road, as shown in figure 20. A short trail leads down to a fenced
overlook for viewing the Coke Ovens to the north (fig. 11) and Monument
Canyon to the northeast.
33Lohman, 1963, 1965a.
|
22 HIGHLAND VIEW DIVIDE |
The Summerville Formation is exposed on the right for
about the next half a mile. In the next three-quarters of a mile
to Highland View the roadcuts are in the
sandstone ledges of the Salt Wash Member of the Morrison Formation.
Another half a mile through massive Salt Wash sandstones
takes us to the second highest point on Rim Rock Drivethe
divide between Monument and Ute Canyons, altitude 6,593 feet. From here
we may look far to the south across Glade Park to high Piñon
Mesathe highest part of the Uncompahgre Plateau
northwest of Unaweep Canyon, where the altitude is
about 9,500 feet.
|
23 LIBERTY CAP TRAILHEAD |
Halfway down the hill to the south is a
parking area on the left at the head of Liberty Cap Trail, which
goes eastward about 6 miles to Liberty Capa prominant conical point atop
the Wingate cliff just west of the mouth of Ute Canyon, which
appears on the left skyline of figure 38. From there, the trail
descends about 2 miles to a gate in the boundary fence at the
mouth of Ute Canyon. The roads connecting the gate with
South Camp Road (fig. 3) were reported (1979) to be closed to
foot travel by private landowners, so hikers reaching this point
must either retrace their steps to the parking area at the head
of the Liberty Cap trail, or return by a primitive trail up main
Ute Canyon, turn right up the west arm of the canyon, and
regain Rim Rock Drive by a short switchback trail noted on
page 109. However, the Park Service hopes that in the future
some sort of corridor can be established to connect the trailhead
with the nearby roads. Most of the "trail" up Ute Canyon
is the normally dry channel of the creek, so hikers should
watch out for flash floods. The round trip by Liberty Cap Trail
alone is about 16 miles, and if the return trip is made by Ute
Canyon the total distance is about 13 miles. Accordingly,
hikers should allow a full day and carry food and
water.
|
GLADE PARK ROAD |
A quarter of a mile west of the Liberty Cap
parking area in the west arm of Ute Canyon is a junction with a
gravel road that leads 5 miles south to the Glade Park General
Store and Post Office, where groceries, beer, gasoline, and
fishing and camping supplies are available. Glade Park connects with
scenic roads leading east, west, and south. Later, we will cover in more
detail a round trip from the intersection in Ute Canyon to one near Cold
Shivers Point, and another round trip from Glade Park around the head of
No Thoroughfare Canyon and back to Grand Junction via the Little Park
Road.
But to continue with the trip through the
Monumentfrom the intersection with the gravel road to Glade Park,
Rim Rock Drive turns abruptly to the southeast and follows the west arm
of Ute Canyon for some 3 or 4 miles, past many interesting points. For
the next 1-1/3 miles to the first culvert, which crosses a large
tributary, the roadcuts are in the Summerville Formation and Entrada
Sandstone. The photographs in figures 16 and 17 were taken looking
north from the culvert and from just northwest of the culvert,
respectively.
|
24 FLOOD |
One day when my family and I were approaching the culvert
from the west, we heard a roar like an express train. Looking to
the south we saw that a severe thundershower was occurring
on the headwaters in Glade Park, so we raced ahead
and parked east of the culvert just in time to see and hear a 4-foot
wall of red water come roaring down the tributary, rolling boulders
along as if they were basketballs. Unfortunately, we had no time to
ready or use a camera, so we simply raced down the road embankment and
through the trees and brush to the north in time to see the flood plunge
eastward over a 350-foot cliff of the Wingate Sandstone to the canyon
below. This illustrates the need for caution when following or crossing
"dry" washes in the desert in stormy weather or when there
are storms in the distance.
|
25 UPPER UTE CANYON VIEW |
About two-tenths of a mile northeast of
the culvert is Ute Canyon View, which affords good views of
the northeast cliff face of the west arm of Ute Canyon.
|
26 FALLEN ROCK OVERLOOK UTE CANYON TRAILHEAD |
For the next 7-1/2 miles Rim Rock Drive is once again
on a bench of the Kayenta Formation between cliffs of the Entrada and
Wingate Sandstones. From Upper Ute Canyon View the road goes
southeastward along the canyon rim about three-tenths of a mile to a parking area. A short
trail leads down from the parking area to fenced Fallen Rock
Overlook; the view shown in figure 35 is from this point.
As noted in the caption of figure 35, and on page 108, the Ute Canyon
Trail zigzags down the slope from the road a quarter of a mile
southeast of the parking area, but there is no
parking area at the trailhead, so it is safer to park at Fallen Rock
Overlook and walk to the trailhead. The connection with this trail and
the Liberty Cap Trail also is discussed on page 108. On one hike down
this trail we saw two elk, which is a rare sight at such a low altitude,
for they generally stay on or near Piñon Mesa.
|
27 UTE CANYON |
About a mile to the southeast, just beyond
the steep dropoff on the left, there is room to park, walk a short
distance through the trees to the east, and observe a fine view of main
Ute Canyon, as shown in figure 52. Just beyond on our right are the
cliffs of the mottled salmon-and-white Slick Rock Member overlain by the
all white Moab Member, as shown in figure 18 and described in the
accompanying text.
|
UTE CANYON, looking northeast from point described in text.
Note grass-covered alluvium in distant part of canyon floor. (Fig. 52)
|
Half a mile southeast, where the road makes a gentle
U-turn and continues northeastward, we reach the highest point on Rim
Rock Drive at an altitude of about 6,640 feet. Note that the piñon ??? and
juniper are larger, and the bushes are larger and greener at this
altitude, for the average precipitation increases as we go higher.
|
28 LOWER UTE CANYON VIEW |
About a mile northeast of the highest point
on the road is a large parking area on the left, from which a short,
shaded trail leads to a fenced overlook called Lower Ute Canyon
View, which faces the northwest arm of Ute Canyon across
the main canyon.
|
29 RED CANYON OVERLOOK |
About half a mile beyond this parking
area, we reach a small parking area at Red Canyon Overlook,
from which the photograph shown in figure 12 was taken. The dark green bush
of Mormon Tea in the right foreground of figure 12 is one of the
largest I have seen in the Monument. The reasons for the differences
between the left and right walls of the canyon are
discussed on pages 79 and 80. The ripple-marked curbstones of
white sandstone in the parking area were quarried from the
Moab Member of the Entrada Sandstone northwest of Fruita
Canyon, as noted on page 96.
|
30 DS ROAD COLD SHIVERS POINT |
Another 2-1/2 miles around the south rim of Red Canyon and
the head of Columbus Canyon takes us to the junction with the
paved county road known as the DS Road, which leads
south and southwest to Glade Park and to the head of No Thoroughfare
Canyon. This important intersection will be included in trips through
Glade Park and around the head of No Thoroughfare Canyon, so it will be
discussed later. Meanwhile, we will continue our trip eastward from this
intersection. About a third of a mile to the northeast is a
large parking area, with a path leading to a fenced overlook at the
rim of Columbus Canyon for viewing Cold Shivers Pointperhaps the
most aptly titled feature in the Monument (fig. 53). A primitive path
leads from the overlook to the toadstool-shaped platform at upper right,
on which some visitors dare to stand, but not me. When the old, steep
Serpents Trail was the only route for autos to ascend from the East
Entrance, barrels of water were kept at this parking area to quench the
thirst of boiling radiators.
|
COLD SHIVERS POINT, looking north from fenced overlook on east
edge of Columbus Canyon. Named feature is toadstool-shaped rock
at upper right. Note dark Proterozoic rocks in canyon bottom. (Fig. 53)
|
|
31 HEAD OF SERPENTS TRAIL |
After leaving the parking area, the
downgrade on the Kayenta Formation begins to steepen to the northeast
until it becomes advisable to shift into second gear. In about half a
mile we descend a series of steep switchbacks cut into the Wingate
Sandstone on the steepening Ladder Creek monocline
(figs. 8, 29), and we reach the present upper end of the old
Serpents Trail (fig. 54), which is now an interesting foot
trail. As noted earlier, it is convenient to hike down this steep
2-1/2-mile trail and to have one member of the party drive ahead
and await the hikers at the parking area in the Devils Kitchen
Picnic Area, near the foot of the trail. One of many rewarding
views seen during the hike is shown in figure 55, another was
seen in figure 10.
|
TOP OF OLD SERPENTS TRAIL, looking northeast from switchbacks
above tunnel. Top of trail is seen at sign on lower right. Grand Mesa
forms right skyline. (Fig. 54)
|
|
LOOKING NORTHEAST FROM OLD SERPENTS TRAIL, before
1950 when the trail was still used by autos and trucks. One of John
Otto's old foot trails joins the old road at lower middle. Although no
thick lenses of sandstone appear in the Salt Wash Member of the Morrison
Formation in figure 21, in this view a lens about 50 feet thick begins
just around the corner near the base of the high bluff across No
Thoroughfare Canyon and is seen extending as far to the left as the
normally dry wash that drains the canyon. When water flows down the wash
after thundershowers (see p. 118) or from melting snow, the sandstone
lens takes in water (recharge) which moves slowly down the dip of the
lens to the northeast and supplies several artesian wells. In turn, the
light band of the Entrada Sandstone beneath the cottonwood trees at the
right middle and the dark patch of Wingate Sandstone at the extreme
lower right are recharged in like manner, and they supply water to
artesian wells to the northeast. As the older and deeper sandstones on
the right take in water at higher altitudes, the water in them is under
greater artesian head when tapped by wells. If you think you see covered
wagons near the middle of the photograph arranged in a circle for
defense against attack by Indians, you are correcta Western movie
was about to be filmed. (Fig. 55)
|
|
FOOT OF SERPENTS TRAIL |
Just beyond the lowest switchback shown in figure 54, we
penetrate the Wingate Sandstone through a tunnel, the south
portal of which is shown in figure 56. After we drive through a
deep cut in the Wingate Sandstone just south of the
tunnel, we cross the entire red Chinle Formation, then descend a series
of switchbacks in old Proterozoic rocks. The Chinle Formation is crossed
again near the foot of the hill, where it is about 80 feet
thick,34 then we recross the Wingate Sandstone and Kayenta
Formation to the parking area in the Devils Kitchen Picnic
Area, near the foot of the old Serpents Trail.
34Lohman, 1965a, p. 22, 21.
|
SOUTH PORTAL OF TUNNEL THROUGH WINGATE SANDSTONE, on west side
of No Thoroughfare Canyon above East Entrance. (Fig. 56)
|
|
32 DEVILS KITCHEN |
An improved marked trail leads southward from parking
area at the foot of the Serpents Trail, crosses No Thoroughfare Canyon,
and continues as an unimproved trail to the Devils Kitchen, a view of
which is shown in figure 57. The petroglyphs shown in figure 4 are
northeast of this parking area. Those interested in seeing them should
inquire at the ranger station or checking station at the East
Entrance.
|
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)
|
|
EAST ENTRANCE |
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.
|
bul/1508/sec12c.htm
Last Updated: 8-Jan-2007
|