Colorado River
Summer 2004
Images
Lees Ferry to House Rock
House Rock to Eminence
Eminence to Below LCR
Below LCR to Above Zoroaster
Above Zoroaster to 122-Mile
122-Mile to Matkat Hotel
Matkat Hotel to Whitmore Wash
Whitmore Wash to Gneiss Canyon
Gneiss Canyon to South Cove
Miscellaneous
Panoramas
Videos
Gneiss Canyon to South Cove
Sunday June 6, 2004 (Day 9)
Showing some leg (Leighty)
Mile 261 - Frolicking boat people at Quatermaster. We provided amusement for those watching from the helipad above. See VIDEO.
John & John (Leighty)
Mile 265 to 275 - With sand bars always lurking below the surface, the Johns keep eye on our progress during the lake portion of the Grand Canyon.

Boat lunch (Leighty)
Mile 265 to 275 - Our last lunch feast.
Wheeler Ridge (Leighty)
Mile 284 - West of our jetboat, north-trending Wheeler Ridge is the first distinctive feature seen on Lake Mead. Flat iron-shaped ridges are formed by streams cutting into the tilted layers. The Permian and Pennsylvanian Esplande Sandstone, Pakoon Limestone, and Callville Limestone of the Supai Group are exposed on this side of the ridge.

Dipping strata in Grand Wash Canyon (Leighty)
Mile 285 - Higher lake levels leave a bleached mark on these tilted Wheeler Ridge layers in Grand Wash Canyon. The Wheeler Fault lies just to the west, and with about 4,500 feet of west-side-down displacement, it is responsible for eastward tilt of Wheeler Ridge.

Lava cap (Leighty)
Mile 286 - To the north, a lava flow remnant (basalt of Grand Wash) overlies light-colored sedimentary deposits of the Late Tertiary Muddy Creek Formation. The Muddy Creek sediments are Late Miocene in age (11.6 to 5.3 Ma). This Pliocene lava flow (~3.8 Ma) is older than the lavas in the Vulcans Throne to Whitmore Wash area.
West of Wheeler (Leighty)
Mile 286.5 - Looking SE, back at Wheeler Ridge. This section includes the Temple Butte Limestone at the bottom, the massive Redwall Limestone in the middle, and the Callville Limestone of the Supai Group at the top.
Center Point Ridge (Leighty)
Mile 286.5 - Passing the smaller Center Point Ridge. Kaibab Limestone forms the cliff here.
Iceberg Ridge (Leighty)
Mile 287 - Iceberg Ridge is just west of Wheeler Ridge.
Spectacular flat irons (Leighty)
Mile 287 - More cool flat irons developed in the tilted Paleozoic sedimentary rocks of Iceberg Ridge.
Angular unconformity (Leighty)
Mile 287.5 - View N of the lavas overlying light-colored sedimentary rocks. The tilted reddish rocks at the bottom are rocks of the Triassic Moenkopi Formation(?) , last seen at Lees Ferry. The contact between the Moenkopi and overlying rocks is an angular unconformity, representing roughly 200 Ma.
Iceberg Ridge (Leighty)
Mile 288 - View S of east-dipping Iceberg Ridge.
Iceberg Canyon (Leighty)
Mile 288.5 - More flat irons in Iceberg Canyon, formed in the sedimentary layers of the Esplande Sandstone, Pakoon Limestone, and Callville Limestone of the Supai Group. The Iceberg Fault, an oblique-slip fault with over 2700 feet of displacement, trends down this canyon, as does the Arizona-Nevada border (Nevada on the rhe right). South Cove is about 8 miles away from here, at Mile 296.8.
Pointing to the sky (Leighty)
Mile 288.5 - A close-up view of the flat irons.
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Day 9