HILL : GEOLOGY OF THE ISTHMUS OF PANAMA. 283 



LIST OF TEXT FIGURES. 



Page 



Coast of Puerto Bello 156 



Monkey Hill Base Leval 175 



Section on Mr. Shafer's Farm near Pefia Negra, showing Contact of 



Foraminiferal Marl with Boulder Formation 178 



Section at Vamos a Vamos 180 



Hill near Mamei, showing typical Isthmian Eminence 182 



Section across Chagres River at Barbacoas 184 



Bluff at Mata Chin, showing Superposition of the Boulder Formation 



with Massive basic Igneous Rocks 188 



Fig. 8. Section near Mamei, showing Gradation of Mata Chin Boulders 



into finer Material 189 



Fig. 9. Topography in Vicinity of Mata Chin, showing supposed Ancient 



Bench of Chagres 191 



Fig. 10. Naos, Culebra, Perieo, Flamenco, San Jose Rocks, Bay of Panama . 1'j7 



Fig. 11. Section at Miraflores, showing Disturbances 203 



Fig. 12. Tabogo and Taboguilla 203 



Fig. 13. Tabogo Island and outlying Rocks 203 



Fig. 14. Guano covered Rock near South End of Taboguilla Island . . . 204 



Fig. 15. San Jose Rock, Panama Bay, Remnant of Panama Base Level . . 204 



Fig. 16. Basaltic Rock, South End of Taboguilla Island 204 



Fig. 17. Coast Topography between Mariato Point and Moro Puercos . . 217 



Fig. 18. Salsipuedes Point 218 



Fig. 19. Cucavado Rock, near Peninsula of Salsipuedes 218 



Fig. 20. Waterfall into Pacific Ocean near Lorena Point 218 



Fig. 21. Cano Island, off Coast of Salsipuedes 219 



Fig. 22. Section on side of Road ascending Rio Grande, Costa Rica, opposite 



the Garita (Gabb) 223 



Fig. 23. Section of Boulder Clays, Flank of Irazu Summit, between San 



Jose and Cartago (Gabb) 226 



Fig. 24. Detailed Section at Port Limon, Costa Rica 234 



