thumbnail

Geologic map of the Wenatchee 1:100,000 Quadrangle, central Washington

IMAP 1311

By:
, , , , , and

Links

Abstract

The rocks and deposits within the Wenatchee quadrangle can be grouped into six generalized units: (1) Precambrian(?) Swakane Biotite Gneiss in the northeastern part of the quadrangle and the probable Jurassic low-grade metamorphic suite, mostly composed of the Easton Schist, in the southwestern part; (2) the Mesozoic Ingalls Tectonic Complex; (3) the Mesozoic Mount Stuart batholith; (4) lower and middle Tertiary nonmarine sedimentary and volcanic rocks; (5) Miocene basalt flows and interbedded epiclastic rocks constituting part of the Columbia River Basalt Group and interbedded silicic volcaniclastic rocks of the Ellensburg Formation; and (6) Pliocene to Holocene alluvium, glacial, flood, and mass-wastage deposits.

Study Area

Additional Publication Details

Publication type:
Report
Publication Subtype:
USGS Numbered Series
Title:
Geologic map of the Wenatchee 1:100,000 Quadrangle, central Washington
Series title:
IMAP
Series number:
1311
Subseries:
NONE
Edition:
-
Year Published:
1982
Language:
ENGLISH
Description:
1 map :col. ;56 x 75 cm., on sheet 106 x 140 cm., folded in envelope 30 x 24 cm.
Scale:
100000