The West American Saiiet” 
interesting fact, and one which tions workable beds of coal may be 
seems to have escaped the notice of found, but the probabilities are a- 
all previous investigators, is s the ex- gainst it. The position of the str ta 
istence, on the Santa Rosa ranch of also militates aga‘nst the ibe 
a basaltic lava ane: tis lava flow. of finding artesian water 
forms a series of flat-topped hills, When we try to trace the uote 
beginning near Murrietta, at an alti-" s-heiof the h i! ight of the land dur- 
tude of 1800 feet, and éxtending ing the tertiary and the quarten 
westward, with bold cliffs to the Gane es we become almost‘ confu 
south, a distance of ten miles, reach- Some of these changes of level have 
ing ae eon St of 2500 eek < on Me- We ae accompanied by viol ent distur- 
i 
af : un ancient oratee sare ely of Piet Loma, and in she freq) 
= a voleanic conglomerate. Anoth-  ¢o1diy, e of the strata: False bay oce 
5 ie cupying a sypchinal basin; Pt. Lo: 
of Mesa Redondo, and ab is @ and La Jolla lying at the summi 
narrow stream of lava descended @ 4), anticlina ) 
distance of 2000 feet in che. course : . 
of a mile and a half, terminating in During the latter part of the ter 
De Luz valley. From the center of tiary this region was raised f 
= 
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of oak trees, and Fence called Oak now represented e the svat 
Ridge by the people of the valley. lands from Santa Barbara cy, 
Under the high, level table laucs At the beginning of the mode: 
of lava is a layer of soft sandstone. riod there was « great suo 
No other outcrop of sandstone ap- und the open ocean washed Uh 
pears in the vicinity, except in one of the granit@mour ~~ 
or two nooks in the Santa gad them to form the great stre 
mountains, at an altitude o. . mesa. ‘This y. 
‘Uhe great strain prodticed in she up- ual elevation, ad ane ess 
: this arty ou Losepagiti oc- numerous terr:ces 0: : 
ing after the miocer the ‘Ihe last elevation, stent 40 | 
“ac ‘Tomtit ene, of ‘the outburst. taken place so recen tly that 
ie - shells im the old bea ch line 
_ THE MESA FORMATION. living in the adjoining ocean 
When we come to the study of 
the mesa formation a difficulty arises 
as to the aeveR ee al relations of 
the various members of the tertiary . 
a a 
uch are some of the 
arises the difficulty in drawing a line sp ‘na teren te ce ta ly: des 
between the cretaceous rocks of Pt. more attention ‘shan it aa ae 
Loma and La Jolla and the tertiary. ceived — —San Dies? = Apr. 
Iti is ener that in these forma- 1891. 
