112 CONTRIBUTIONS TO ECONOMIC GEOLOGY, 3902. [bull. 213. 
Beyond here the structure is not as well known. In a general way it 
is believed that the beds dip northwardly and pass through several 
minor folds and considerable faulting until "beyond Connor Peak 
the beds of the Lower Coal Measure group are found to be pushed up 
and crumpled together in short sharp folds, giving no less than three 
small anticlines. " a At the extreme north end of the range, along 
the general northeast-southwest strike, the dip is much disturbed and 
varies from vertical and 40° N. on the mainland to 5°, 10°, and 30° S. 
in Sheep Rock and outlying outcrops along the shore to the north. 
Structure of the district. — The Bingham district itself thus lies in a 
broad, shallow, synclinal basin which pitches gently northward and 
is limited on the west by the Tooele anticline and on the east by the 
abrupt Bingham upturn. Minor folds occur with various irregulari- 
ties of strike, but they are relatively unimportant. Fracturing and 
Assuring lias taken place very extensively throughout the district. 
The amount of displacement in the instances studied is not, however, 
great, rarely amounting to 100 feet. 
The general distribution of these sediments and intrusives is sim- 
ple, but the detailed distribution is most complex and irregular. 
Briefly, the three great limestone series and the massive quartzites 
which separate them occupy the southern and southeastern portions 
of the area, and strike from the main divide on the west northeast- 
ward through the district. The great siliceous upper series of quartz- 
ites, calcareous shales, sandstones, and thin limestones overlie them 
and occupjr the north and northwest half of the area. The intrusives 
lie mainly in the southern portion of the area in two great divisions, 
the lower, lying south of the middle limestone series (Old Jordan- 
Telegraph- Yosemite and Commercial-Brooklyn limestones), and the 
upper, which overlies this lime series. The sediments and their asso- 
ciated intrusives disappear on the east along a generally north-south 
line under the later volcanics, which in turn are blanketed by Quat- 
ernary deposits. In brief, the geological map of this area may be 
pictured roughly as follows: Conceive an oblong area in which the 
four points of the compass lie at the four corners; draw a straight 
line from the north corner to the middle of the southeast side, a sec- 
ond line from the same corner to the middle of the southwest side, 
and a third across the south corner in an east-west direction; then 
the first line will delimit the contact between the late deposits (Quat- 
ernary and volcanic) on the east and the Carboniferous on the west, 
the second will delimit the great siliceous series on the north from tin 
main mineralized area comprising the limestone series with separat 
ing quartzites and intrusives on the south, and the third will delimit 
the Lower Carboniferous to the south from the Upper Carboniferous 
to the north. 
« Emmons, S. F., U. S. Geol. Expl. Fortieth Par., Vol. II, p. 444. 
