Interim Geologic Map of the Midvale Quadrangle, Salt Lake County, Utah (OFR-761)

By: Adam McKean

 The Midvale 7.5' quadrangle is in the south-central part of Salt Lake Valley.
Surficial unconsolidated geologic deposits within the quadrangle consist of alluvial, deltaic, eolian, lacustrine, and mass-movement deposits of Quaternary age. Lacustrine and deltaic sediments were deposited in late Pleistocene Lake Bonneville (30,000 to 13,000 years ago). During and following the regression, the Jordan River and other streams incised into Lake Bonneville deposits forming Holocene alluvial channels, which have exposed the Bonneville deposits and in places the pre-Bonneville deposits, and depositing Holocene floodplain and alluvial-fan sediments. A single outcrop of Pennsylvanian Oquirrh Group bedrock, likely Bingham Mine Formation, was previously exposed in the southeast corner of the quadrangle, but recent development has destroyed and covered it.

Published: 2024
Pages: 12
Plates: 2