TORO LIMESTONE MEMBER OF CHAGRES SANDSTONE RESTING ON MARLY SILTSTONE IN MIDDLE PART OF GATUN FORMATION IN ROAD CUT 3 KILOMETERS SOUTHWEST OF GATUN, CANAL ZONE
 The contact between the formations is at the pick point of the hammer. Photograph by Geological Section, Special Engineering Division, Panama Canal Compony.


CTROLOGTCAT, SURVEY