Grand Canyon 3-D Tour
Hurricane Fault at 192 Mile Canyon to Mollies Nipple
Grand Canyon Miles 192 to 200
View to the west-northwest
with the Hurricane Fault just above and parallel to the bottom edge.
Erosion along the fault has created 192 Mile Canyon at the extreme
lower left, but drainage from higher elevations (off the edge to the
left) uses 193 Mile Creek to join the Colorado River (just after it
turns to the west). Near the top edge and right of center, Lone
Mountain is bounded by two parallel northwest to southeast faults. The
river turns south (left) again where Parashant Wash/Fault meets the
river.
The vertical walls of the inner gorge that were prevalent to the east of the Toroweap Fault are much gentler through this section. First, the multiple faulting here has opened many fractures allowing easier erosion. Secondly, this part of the canyon has only had minimal down cutting in the last one million years. Hence erosion only widens the canyon instead of deepening it.
Rock layers next to the river consist of remnants of lava flows overlying Muav Limestone and Bright Angel Shale.
The vertical walls of the inner gorge that were prevalent to the east of the Toroweap Fault are much gentler through this section. First, the multiple faulting here has opened many fractures allowing easier erosion. Secondly, this part of the canyon has only had minimal down cutting in the last one million years. Hence erosion only widens the canyon instead of deepening it.
Rock layers next to the river consist of remnants of lava flows overlying Muav Limestone and Bright Angel Shale.
View to the southwest with
Parashant Wash entering from the right edge. Mollies Nipple is the
conical mountain rising above the Esplanade surface (to the right of
the river) and is an isolated remnant of the North Rim. The green
plateau in the upper right corner is part of the Shivwits Plateau
(North Rim).
There are still many remnants of lava flows that are found alongside the river. The Bright Angel Shale and Tapeats Sandstone layers were exposed at river level before the lava flows of the last one million years, and the present depth of the canyon hasn't changed much. However, erosion is slowly widening the gorge.
The cliffs above the river still contain the Muav and Redwall Limestone units that started way back in the Marble Canyon section, but other limestone units (mostly of Devonian age) also contribute in western areas of the Grand Canyon. The Redwall is no longer the reddish color since the Hermit Shale that stained it has now retreated further back from the edge. Thus for the rest of the canyon, these units all tend to blend into "generic limestones".
Return to river miles 184 to 192
Continue to river miles 200 to 208
Return to the Index Page for the Grand Canyon Tour
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There are still many remnants of lava flows that are found alongside the river. The Bright Angel Shale and Tapeats Sandstone layers were exposed at river level before the lava flows of the last one million years, and the present depth of the canyon hasn't changed much. However, erosion is slowly widening the gorge.
The cliffs above the river still contain the Muav and Redwall Limestone units that started way back in the Marble Canyon section, but other limestone units (mostly of Devonian age) also contribute in western areas of the Grand Canyon. The Redwall is no longer the reddish color since the Hermit Shale that stained it has now retreated further back from the edge. Thus for the rest of the canyon, these units all tend to blend into "generic limestones".
Return to river miles 184 to 192
Continue to river miles 200 to 208
Return to the Index Page for the Grand Canyon Tour
Web page generated via KompoZer