GEOLOGY AND PALEONTOLOGY OF CANAL ZONE USGS Cenozi Field No. No. No. USGS used in Ceooic Field this No. No. report 120 No. used in this report 85 5903 Description of locality UPPER PART OF CAIMITO FORMATION, MADDEN BASIN, PANAM-cOntinued Rio Chagres, top of hill opposite Alhajuela. [Alhajuela sandstone member.] D. F. MacDonald, 1911. [For location of Alhajuela see Reeves and Ross, 1930, pl. 5.] Rio Chagres, top of hill opposite Alhajuela. [Alhajuela sandstone member.] A. A. Olsson, 1919. Same as locality 85. Not plotted. Rio Chagres, % to mile (200 to 400 meters) above Alhajuela. [Alhajuela sandstone member.] D. F. MacDonald, 1911. [A submerged locality, about 400 meters north of locality 85.] Not plotted. Rio Chagres between Alhajuela and El Vigia. [Presumably Alhajuela sandstone member.] H. Pittier, 1911. [For location of El Vigia see Reeves and Ross, 1930, pl. 5. [A submerged locality, too indefinite to plot.] 1.6 kilometers northwest of Madden Dam, on abandoned Public Roads Administration road to powder magazine. Alhajuela sandstone member. W. P. Woodring, 1949. Madden Highway, 1 kilometer northwest of Madden Dam. Alhajuela sandstone member. J. R. Schultz, T. F. Thompson, and W. P. Woodring, 1947. 1.2 kilometers south-southwest of Madden Dam, on road between Madden Highway and Transisthmian Highway. Alhajuela sandstone member. W. P. Woodring, 1949. 30 meters southwest of locality 90. Alhajuela sandstone member. W. P. Woodring, 1949. Not plotted. Transisthmian Highway, 1.3 kilometers southeast of Rio Chagres bridge. Alhajuela sandstone member. J. R. Schultz and W. P. Woodring, 1947. Madden Highway, 2 kilometers southsoutheast of Madden Dam. Alhajuela sandstone member. J. R. Schultz, T. F. Thompson, and W. P. Woodring, 1947. 93 94 94a 95 96 96a 97 126 37 104 1 6509 6510 85a 86 87 Description of locality UNDIFFERENTIATED CAIMITO FORMATION, RfO CHAGRES AREA, CANAL ZONE 41 Trail 750 meters southwest of Nuevo San Juan. Coarse-grained conglomeratic pebbly sandstone. T. F. Thompson and W. P. Woodring, 1949. Larger Foraminifera. Rio Chagres, limestone at and a little, above Las Cruces. D. F. MacDonald, 1913. [A submerged locality.] Location approximate. Rio Chagres, limestone a little belose Las Cruces, on north bank of river. D. F. MacDonald, 1913. [A submerged locality a short distancsouth of locality 94.] Not plotted. LOWER PART OF CAIMITO FORMATION, PACIFIC COASTAL AREA, PANAMA Transisthmian Highway, 325 metersnorth of junction with Panam:i National Highway. Thin lens of algal limestone in tuff and tuffaceous sandstone. J. A. Tavelli and W. P. Woodring, 1947. Larger Foraminifera (Cole, 1952 [1953]). Panamd National Highway, about 175, meters northeast of junction with Transisthmian Highway. Lens of algal limestone in tuff and tuffaceous sandstone. T. F. Thompson and' W. P. Woodring, 1947. Larger Foraminifera. Borrow pit on north side of road to housing development, about 3.2 kilometers northeast of Tocdmen. Fine-grained tuff. T. F. Thompson, and W. P. Woodring, 1947. Larger Foraminifera. LOWER PART OF CAIMITO FORMATION, MADDEN HIGHWAY AREA, CANAL ZONE Stream about 100 meters west of. Madden Highway and 1.6 kilometers northeast of junction with Gaillard Highway. Limestone T. F. Thompson and W. P. Woodring, 1947. Larger Foraminifera 5904 5874 88 1 17682 1 143 89 16956 17 144 90 1 17683 17684 1 144a 90a 91 92 16952 16940 9 16