﻿GEOLOGY AND PALKONTOLOGY OF THE CANAL ZONE. 539 



Oligoceno — Continued. Foet thick. 



5. p''rial)l(), lip;nilic Hhalo hod 2 



4. I Afi^hi-^ray , lirrjy-lookinf^ clay bod with some limy 

 nfxIiiioH and Bomo lenses of noft nodular olaycy 



liinoHtono 



?). Friable, lignitio Hhalo bed f 2 



2. Li^ht-gray to groeniHh fine-grained clay and fine 



agglomerate. Fairly maHHive 7 



Unconformity. 



Focenc? 



Las CaHcadaH agglomerate: 



] . Dark -gray volcanic agglomerate 50 



Total thickness 275 



Section in rutlinga of Panama liailroad near ('aimiio Junrliim. 



Oligoceno: 



Emperador limestone — 



J Foot thick. 

 6021 and 667.3 4. Light-gray to croarn-colorod, Handy linio- 

 Htono, Lepidocydina vaufjhani abundant, 

 ii]H(> anu]]i\H>rv. (lAtholliammiwmisthmi) ami 

 nuiiKTouH fragiuoritH of of^liinoid toHtH, in- 

 cluding a ( 'lypecv'Uri;!). Strike N. 30° K., 

 dip 20 " N . 00'^ W About. . 70 



Unconformity. 



Uohio conglomerate — 



3. Fine argiliacfM>uH conglonxsrato; Hmall jiolihlo bodn 

 with sandy matrix, separated by clayey and Handy 

 layers 20 



2. Conglomerate, with gravel, cobbles, and small boul- 

 d(!rH; matrix clayey and sandy; fairly well bodd('d. 

 ("oldjbjH and bouldorn are mostly hornbI(;nd<' ando- 

 eitc and diorito 20 



Unconformity. 



Koc(!ne (?) (Las (lascadas agglomerate; j: 



1. Dark, maHHive, hard, and fairly w<;ll cemented andoHitic 



agglomerate. (JontaiuH subaiigular fragments of andosite 



and basalt from a foot or more to Iohs than an inch in 



diameter. Matrix fine dark andosite tuff. 



United States National Museum locality record station C022 is 



on limc-Htono about the Hamc; as (/Ij, dowjrib<;d above, a mile 



farther north. 



h'ailroad cut near gtream about midway between Rio Frijol and Rio Frijolito. 



Oligoceno (Culebra formation): Foet thlok, ^ 



2. Surficial, residual red clay 15 



G02.3. I. Dark, very bawic, friable, tufacooUs material; Lejd- 



docydina cuneUd very abundant About. . 25 



