PROJ00455

• Contract/PO #: C153583
• Contractor Name: Ute Water Conservancy District
• Water District: 0
• Bill Number: XB 99-999
• Loan Projects - Doc Type: Feasibility Study

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Alluvial and eolian deoosits
Qa _ Alluvial deposits; chiefly silt, sand, and gravel in flood plains, fans, and low terraces
Qae - Alluvial, eolian, and lake deposits; chiefly silt and sand on ridges and mesa tops

Colluvial deoosits
Qc - Earthflow, mudflow, landslide. and talus deposits

Alluvial f!ravels
Qag _ Terrace and fan deposits fonned during several cycles of erosion

Terrace IZravel
Qt - Terrace deposits formed during earlier cycles of erosion

Basalt
Tb _ Scoriaceous and vesicular lava capping Grand Mesa and Mount Callahan. Represents several flows on Grand Mesa

Pediment deoosits

Qp -

Sand and gravel veneering pediment surfaces fonned during several cycles of erosion

Till
Stony glacial debris
Qpt - or Pinedale (1) age
Qbt - or Bull Lake (1) age

Hunter Canyon Formation

Kh -

Buff and gray medium to coarse grained massive cliff-fonning sandstone and gray to greenish-gray shale. Thickness
375 to 1,400 reet

Uinta. Green River. and Wasatch Fonnations
Unila Fonnalion:
Tu - Main body; brown, red, and green sandstone, siltstone, and shale
Tuu - Unnamed tongue; yellow-brown sandstone and siltstone
Green River Fonna/ion:

Tge -
Tgeu-

Tgp -

Evacuation Creek Member; gray marlstone and yellow-brown siltstone and sandstone
Unnamed tongue; gray marlstone and yellow-brown siltstone, sandstone, and tuff
Parachute Creek Member; gray marlstone and dark gray oil shale; some yellow-brown sandstone, siltstone, and tuff

PROJECT NO.
33701

DATE
1/91

REVISION
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STEFFEN ROBERTSON & KIRSTEN (U.S.)
Consulting Engineers & Scientists

PREPARED BY,

FIGURE 3.3A

GEOLOGIC MAP
LEGEND