﻿GEOLOGY AND PALEONTOLOGY OP THE CANAL ZONE. 47 



60^4- — Section in railway cuts near New Frijoles. 

 a. Oligocene — Gulehra formation. 

 Dark, basic, orbitoidal, tufaceous material. 



Many worn central portions of Orbitoids and a very few other 

 foraminifera poorly preserved. 

 6025. — Oligocene — Culehra formation (upper part). 



About 200 yards south of southern end of switch at Bohio 



Ridge station relocated line Panama Eailroad. 

 Contains a number of species of foraminifera but for the most 

 part broken or poorly preserved. 

 6026. — Two miles south of Monte Lirio. 

 Somewhat coarse-grained sandstone. 

 Few poor specimens of foraminifera. 

 6029. — Section one-half jnile fro7n Camp Cotton.^ toward Monte'Lirio., 

 at l)ig curve on railroad. Miocene — Gatun formation, 

 a. Bluish, fossiliferous argillite. 

 Very few foraminifera. 

 &. Bluish argillite. 



Few foraminifera, but considerably more than in «. 

 c. Bluish, fossiliferous argillite. 

 Very few poor specimens of Amphistegina. 

 6030 — Railroad cut north side of Big jSioamp, one and one-half miles 

 north of Monte Lirio. Miocene — Gatun formation. 

 Bluish gray, argillaceous beds. 



The only foraminifera consisted of a single specimen of Trilo- 

 culina. 

 6031. — Section in cut one-half mile west of Ca/inp Cotton toward 

 Gatun. Miocene — Gatun formation. 



Conglomerate bed and sandy marl 1 foot above. 

 A few poorly preserved specimens of Quinquelo culina were the 

 only foraminifera. 

 6033. — Generalized section of the hluffs exposed along the Panama 

 Railroad^ relocated line., about 3,500 feet south of Gatun Railroad 

 Station. Miocene Gatun — formation. 



c. Dark-colored, marly, fossiliferous clay. 



Rich in foraminifera, especially in specimens. A fair number 

 of species, well preserved. 

 6035. — Vicinity of Mindi Hill. Miocene — Gatun formation. 

 Gray-green, fine grained sandy shell marl. 

 Very fine-grained material, but with numerous species and speci- 

 mens of foraminifera representing an off-shore assemblage. 

 6036. — Monkey Hill, Mount Hope Station. Miocene — Gatun for- 

 mation. 



Dark-colored, fine grained, sandy clay marl. 



