90 SANTA MARIA OIL DISTRICT, CALIFORNIA. 
along a considerable extent of its northern flank. In the region of 
the Pezzoni well an unproductive oil and gas bed is encountered at 
about 1,200 feet below the surface, immediately followed by a dia¬ 
base or lava rock in which the ferromagnesian minerals have been 
weathered to serpentine. In the Williams well the same or a similar 
oil and gas bed occurs much lower. The well was abandoned owing 
to the terrific gas pressure, which heaved heavy tar up into the hole 
and stopped operations. The Palmer well is productive, yielding oil 
of 16° or 17° gravity. Although not directly associated with the 
minor anticline northeast of Canada del Gato, the asphaltum occur¬ 
ring at Fugler Point, 1 mile north of Gary, is important in indicating 
the probable presence of petroleum in the upper end of the Santa 
Maria Valley. 
Conclusions regarding future development .—The region north of the 
Gato Ridge anticline, from the vicinity of Cuaslui Creek westward to 
a point at least a mile beyond the Howard Canyon road, is underlain 
by strata so nearly horizontal as to preclude their containing very 
productive accumulations of petroleum. North and northwest of 
this region, however, especially near the axes of the Gato Ridge 
anticline and the anticline north of it, the indications are good for 
productive wells. The conditions for the accumulation of petro¬ 
leum are also good along and just south of the axis of the Gato Ridge 
anticline in the vicinity of Cuaslui Creek and from this locality west¬ 
ward to the upper portion of Canada de los Coclies. The same might 
be said of the immediate vicinity of the row of prominent knobs 
which extend in a straight line northwestward for 5 miles from a 
point about a mile north of Los Alamos, and possibly also, but in a 
less degree, for the territory between these knobs and the axis of the 
anticline. These knobs mark an abrupt change in the dip of the 
beds from 3° to 12° SW. to 35° or 40° or possibly more, in the same 
direction. Wells would have to be sunk to a considerable depth 
along this last-mentioned line to reach the oil horizons, but if oil was 
encountered at all it would probably be in such quantities as to pay 
for the deep holes. 
LA ZACA CREEK-LISQUE CREEK ANTICLINE. 
Structure .—The La Zaca Creek-Lisque Creek anticline extends from 
the ridge southeast of Canada del Comasa southeastward at least as 
far as the edge of the Lompoc quadrangle east of Santa Agueda 
Creek. Its course is practically straight except at the northwestern 
extremity, which bows around toward the southwest and is en echelon 
with the east end of the Gato Ridge anticline. The dips along the 
axis are low in both directions, but distant from it they are much 
steeper, being as high as 30° or more to the northeast on the second 
