SHRATIGRAPHY OF CAETFORNIA COAST RANGES. 421 
lying series of jasper and sandstone. _ The most northerly known 
occurrence of the Knoxviile beds in the Santa Lucia Range is 
on Pine Mountain opposite the town of San Simeon. The 
Knoxville beds here outcrop on the very summit of the range, 
being partly capped by liparite. They have an exposure of at 
least two miles from northwest to southeast and a width of a 
mile. The lower slopes of the mountain surrounding the beds 
consist of jasper, sandstone and dark, fine-grained eruptives. A 
section exposed along the grade of an old road crossing the 
mountain makes it very evident that the Knoxville overlies these 
rocks unconformably, but no good contacts were found there 
owing to the enormous amount of débris. On the southern 
slope the Knoxville beds are well exposed, dipping northerly at a 
gentle angle. To the east they are replaced by a ridge formed 
of hard sandstone and jasper, and in a little gulch eroded 
between these two formations, their relation to each other is dis- 
tinctly shown. At one point the bottom and east side of the 
gulch consists of gray sandstone with thin, irregular layers of 
shale having a vertical dip and a north and south strike. On 
the west side the Knoxville shales, Awcella-bearing a few hun- 
dred feet above, appear in contact with the sandstone, dipping 
west at an angle of 4o°. A short distance further up the gulch 
the Knoxville shales extend up to and overlie the gray sandstone 
with as marked a discordance in dip as that first noted. Less 
than one hundred feet away green jasper is interstratified with 
the sandstone. 
Another area of the Knoxville beds occurs in the same range, 
north of the town of San Luis Obispo. The beds form much of 
the mountainous area extending from the railroad tunnel north- 
west for about fifteen miles. On the southwest these beds rest 
against a great serpentine ridge which forms one of the crests of 
the range. On the northeast they are underlaid by the sand- 
stone and jasper of the Golden Gate series. At many points 
about the heads of Toro and Morro Creeks the Knoxville appears 
to have no great thickness, for it flanks the little hills and ridges 
of the Golden Gate series which project through it in the most 
