HEAD OF SERPENTS TRAIL

[Mile-marker 31]

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 2½-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.

[Illustration: 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)]

[Illustration: 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)]

[Illustration: 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 correct—a Western movie

was about to be filmed. (Fig. 55)]

[Illustration: Petroglyph]

[Illustration: SOUTH PORTAL OF TUNNEL THROUGH WINGATE SANDSTONE, on

west side of No Thoroughfare Canyon above East Entrance. (Fig. 56)]

The Geologic Story of Colorado National Monument Revised Edition · 第 92 / 115 题