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Colorado River Raft Trip - Lee's Ferry to Whitmore Wash - Sept. 2006

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Pelzmann > small scale graben faulting - Unkar Group - PreCambrian - Lava Canyon trail

Pelzmann > Lava Canyon (Chuar) Rapids - Mile 65.5
Cardenas Basalt - age date 1,070 My (Rb-Sr) - over Dox Sandstone, PreCambrian

Pelzmann > Unkar Creek Anazasi - Mile 72.3

Pelzmann > Mile 75.7 - Shinumo Quartzite cliffs over red Hakatai Shale, PreCambrian
View downstream from campsite #3

Pelzmann > Mile 76 - Hance asbestos mine (white talus) on cliffs at top of diabase sill - mined in 1880's and 1890's
Mafic sill intruded into Bass Limestone.
from river: Vishnu Schist, Hotauta Conglomerate Mbr, Diabase Sill, Bass Ls, Hakatai Shale, Shinumo Quartzite at top of cliff (all PreCambrian) - Greatest Angular Unconformity

Pelzmann > Vishnu Schist - water polished - PreCambrian

Pelzmann > Bright Angel suspension bridge (1967)
Vishnu Schist & Zoraster Granite - Cambrian Tapeats Sandstone caps Inner Gorge
Mile 87.6 - Phantom Ranch - Granite Gorge

Pelzmann > Horn Creek Rapids (?) - Mile 90.2

small scale graben faulting - Unkar Group - PreCambrian - Lava Canyon trail

> small scale graben faulting - Unkar Group - PreCambrian - Lava Canyon trail

small scale graben faulting - Unkar Group - PreCambrian - Lava Canyon trail

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Keywords: grand canyon colorado river

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