GEOLOGY AND PALEONTOLOGY OF CANAL ZONE


114


 No. USGS used in Cenozoic Field this No. No.
 report


No.
used in this report


23a 24 25 26


USGS
Cenozoic Field No. No.


 Description of locality



 GATUNCILLO FORMATIoN-continued

 Rio Agua Sucia area, Panam6. About
 30 meters southeast of trail, 2 kilometers southwest of Nuevo San Juan.
 Limestone. T. F. Thompson and W. P. Woodring, 1949. Larger Foraminifera, not collected.
 Rio Agua Sucia area, Panamd. Transistlimian Highway, 3.5 kilometers northwest of Rio Gatuncillo bridge.
 Silty mudstone. J. R. Schultz and W. P. Woodring, 1947. Smaller Foraminifera.
 Rio Agua Sucia area, Panamd. Half
 a kilometer northeast of Transisthmian Highway and 5.5 kilometers northwest of Transisthmian Highway bridge across Rio Gatuncillo.
 Limestone. T. F. Thompson and W. P. Woodring, 1949. Larger Foraminifera.
 Rio Agua Sucia area, Panamd. Trans-.
 isthmian Highway, 5.7 kilometers northwest of Rio Gatuncillo bridge.
 Calcareous mudstone. J. R. Schultz and W. P. Woodring, 1947. Larger Foraminifera (Cole, 1952 [1953]) and
 corals.
 Rio Agua Sucia area, Panamd. Transisthmian Highway, 6.5 kilometers northwest of Rio Gatuncillo bridge.
 Siltstone. J. R. Schultz and W. P.
 Woodring, 1947.
 Same locality, calcareous sandstone 0.5
 to 1 centimeter thick, about 6 meters lower stratigraphically. J. R. Schultz and W. P. Woodring, 1947. Larger Foraminifera (Cole, 1952 [1953]).
 Not plotted.
 Rio Agua Sucia area, Panam. Transisthmian Highway, 7.3 kilometers northwest of Rio Gatuncillo bridge.
 Poorly sorted gritty sandstone. T. F.
 Thompson and W. P. Woodring, 1049. Larger Foraminifera (Cole,
 1952 [1953]).
Rio Agua Salud area, Canal Zone.
 Core hole SL-84, 5.7 kilometers north-northwest of Frijoles station on Panama Railroad and 300 meters south of head of Quebrada La Chinilla arm of Gatun Lake. Depth 22.5 meters, silty limestone. Drilled in 1947. Also outcrop float limestone at same locality. Larger Foraminifera (Cole, 1949).


33






34


21 139 23







22 22a 140


17165 17700


17166


135 134





138a









119


30 31


 Description of locality



 GATUNCILLO FORMATION-continued

 Rio Agua Salud area, Canal Zone.
 Core hole SL-99, 2.2 kilometers southeast of Frijoles station on Panama Railroad. Mostly siltstone.
 Drilled in 1947. Foraminifera. Rio Agua Salud area, Canal Zone.
 Core hole SL-100, 3.3 kilometers southeast of Frijoles station on Panama Railroad. Depth 40.5 to 40.8 meters, siltstone. Drilled in
 1947. Foraminifera.
 Rio Frijol area, Canal Zone. Rio Frijol
 6 kilometers northwest of west end of Gamboa bridge. Sandstone. T. F.
 Thompson, 1948. Also a collection'
 by W. P. Woodring, 1940.
 Rio FrIjel area, Canal Zone. Pipe-line
 road, 6.5 kilometers northwest of west end of Gamboa bridge. Fairly soft limestone. W. P. Woodring, 1949. Larger Foraminifera (Cole,
 1952 [1953]).
 Rio Frijol area, Canal Zone. RIls.
 Frijol, 6.5 kilometers northwest of west end of Gamboa bridge. Sandstone. T. F. Thompson, 1948.
 Rio Frijol area, Canal Zone. Pipe-lineroad, 5 kilometers northwest of west end of Gamboa bridge. Silty mudstone. W. P. W oodring, 1949. Also.
 smaller Foraminifera.
 Rio Frijol area, Canal Zone. Pipe-line
 road, 3.3 kilometers northwest of west end of Gamboa bridge. Limestone. W. P. Woodring, 1949.
 Larger Foramiinifera.
 Gamboa area, Canal Zone. 1.9 kilometers north-northwest of west end of Gamboa bridge, on road to core holes SL-94 and SL-906, 15 meters south of bridge across drainage ditch. Fairly soft limestone. T. F.
 Thompson and IV. P. Woodring, 1949. Larger Foraminifera (Cole,
 1952 [1953]).
RIlo Casaya area, Canal Zone. Quebrada de Oro, a northwestwardflowing tributary of Rio Casaya, 3.3 kilometers southeast of east end of Gamboa bridge. Partly silicified sandy limestone. R. H. Stewart, 1948. Also collections by T. F. Thompson, 1948, and W. P. Woodring, 1949.


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36 37 38


27 1 16931


27a 28 29