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4.

on the vertebrate fauna. on stratigraphic evidence he sub-

divided the Mint Canyon follllation, calling the lower part of.

the section the Tick Canyon formation, froru the type locality,

and retaining the name Mint uanyon formation for the remainder.

Jahns places the Tick Canyon ~eries in the late Lower Miocene

or earliest Middle Miocene, and the Mint uanyon fonnation in

the Upper Miocene epoeh.

C.D. Cooksey (7) in 1934, presented a refinement of

a portion of Kew•s map in a Master of Science Thesis .submitted

to the ualifornia Institute of Technology.

li.E. Wallace (8) made a study of the tuft beds in the

Mint Canyon formation and presented his interpretations in a

Master of Science Thesis to California Institute in 1940.

Bibliographz:

(1) o.H. liershey - Amer. Geologist Vol. 29, 1902.
Some tertiary formation of Southern California.

(2) G.H. Elridge and Ralph Arnold - U. s. Geol. Surv. Hull. 309, 1907
The Santa Clara Valley, Puente Hills and Los
Angeles district of southern California.

(3) w.s.w. Kew • U.S. Geol. Surv. Hull. 753, 1924.
Geology and uil Resources or a part of Los
Angeles and Ventura Counties, California.

(4) J.H. Maxson - uarnegie Inst. Wash. Pub. No. 404, Paper VII, 193<

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( .5) J:t. A. Stirton Am.er. Jour. Soi. vol. 26. 1933.

(6) R.H. Jahns - Carnegie Inst. Wash. ~b. No. 514, l'aper IX, 1940
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( 7) c . .u. Cooksey Ualifornia Institute ot ·.reohnology 'l'hesis, 1934.

(8) H.E. Wallace - California Institute of •reohnology 'l.1hesis, l.940.