Page 15 - cooksey1934

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Geologic age Kew 1923; U. S. G. S. Bul l. 753 , 1924
Parts of L.A. & Ventura Countie s
.
, l luvium
Q1haternary
Terrace deposits 25.0 1
-
------------------ Siiugus f ormation
(u.P l iocene & Pleistocene) 2, 000 1
Pliocene -
Pico format i on (l . Pliocene) 4 , 000 1
Unconformity I -
Intrus i ve basi c rocks

Modelo f ormati on ( u •. iocene) 9 ., 000 1

Mi oc ene
,.
-
Mi nt Canyon formation
( u . 'li ocene) 4 , 000 '

Topanga format ion (m .Mi ocene) 6,000 1

- --
Vaqueros formation (1 .Mioc~ne ) 100-1, 800 1

Oligocene Sfispe formation (Old:gocene) 3 , 500- 4 , 00l) '
-
Tej on f ormation (u. Eocene) 2 , 000'

Eocene Mega.nos formation (m .Miocene) ;c , 000- 3 , 000 1
- ? - . ?
Martinez formation (l . Eocene) 1 , 50 )- 3 , 50(.) I
Unconformity - -
Chico formation ( u . Cretaceous) 5 , 500 1
. -
Cretaceous - - . -
Absent
Unconfor•mi ty I
Jurassic Absent

.. Jurassic? Granit ic r ocks (Jurassic?)
C,
Pre- Juras s ic Met ~o rphi c. rocks (pr-e - Jurassic)

Fig . 3 , Generalized column showing relation of the formations

f ound in the Sand Canyon ar·ea to the othe:r• format i ons f ound in

the Santa Clara ba'sin (t aken f rom U. S .G.S .Bull. 753)