Bulletin . a number ofpoints in this vicinity, the age of the strata was considered of minorimportance, and no attempt was made to verify. The description givenof these deposits, brownish-red sandstones and conglomerates, withminor layers of sandy and muddy shale, applies to the rocks hereobserved. The detailed structure of this tract and its immediate vicinity israther complicated, and lacking any adequate number of exposures, and details as to the old wells, cannot be determined with cer-tainty at all points from workdone up to this time. Themain features, however, maybe taken as follows: Th
Bulletin . a number ofpoints in this vicinity, the age of the strata was considered of minorimportance, and no attempt was made to verify. The description givenof these deposits, brownish-red sandstones and conglomerates, withminor layers of sandy and muddy shale, applies to the rocks hereobserved. The detailed structure of this tract and its immediate vicinity israther complicated, and lacking any adequate number of exposures, and details as to the old wells, cannot be determined with cer-tainty at all points from workdone up to this time. Themain features, however, maybe taken as follows: The ridge known as Sul-phur Mountain has. farther tothe east, the straicture shownFigure 6. in Figure 6 (which must be considered highly generalized). Tiuit is, it is a syncline, faultcnl awayat both sides. Toward the west end, however, and where it enters this tract, theridge divides, extending one arm west and one southwest. The westernarm terminates along the east line of the Pirie tract, the soutliwestern. 30 PETROLEUM IN SOUTHERN CALIFORNIA. runs some distance farther to the west,
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