Page 14 - flint1939

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remains. rill the fossils in the area, however, have been

fregmentary a.s they ha.ve, as a rule, beE'n trc:ns '.orted. Frag-
mentary horse teeth and the :Jroxime_l pha_la.nge of a_ camel, Alti-

camellus species (Ppper Miocene), were found by the author at
the locality listed on the me_,,, as Fl. Numerous fresh water

g2stropods, ?aludestrina ir:,i ts tor -='illsbury, are :=iresent in
this f=:rmation, but they are of no i:r: ·ortance in dating. the

formation.
The Mint Canyon format ion is me.de up of interbedded se.nc.-

stones, shales, ash, ~nd conglomerates. The beds are discon-
tinuous and subject to lateral change. Two zones cf bec:s may

be distinguished in this eree. The lo~er zone m&de un of

sandstones and shales fer the most ~art, with some conglom-

erate, is slightly colored. The coloring is predominately
brown with ,'::cme reds end yellows. These slightly colored beds

lie below the lower ash beds in the northern part of the area.
Above the,se ther-- is e. zone of beds which e:·e predomine.tely

white in color. Interbeddcd 'di th the sedi-::ients e.re eight

easily distinguishable ash beds. The lower six ash beds are

made un of crystalline ~sh; the upper two are almost purel1

nitric. fhe crystalline ash be~s occur e.s three sets of two

each. Each ssh bed of a peir is separated fr~m the other by

from 25 to 75 feet of sandstoneE and conglomerates. The p2irs

are se:;:iarated from ea.ch other C"/ several hundr1:;d feet of varied

sediments. The ash ~e~~ a~e all lensing cut to the ee.stward.