GASTROPODS: TROCHIDAE TO TURRITELLIDAE


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


70 I...-.


16945


'72 1 16957


74 74a 75


16944 17439


123









130




 6




 40




 7




142


17493 1 142a


17437


76 1 5906a


133


 Description of locality



LOWER PART OF CAIMITO FORMATION, MADDEN BASIN PANAMA-COfltinued

Rio Chilibrillo, 1 kilometer below
 bridge on road to Casa Larga.
 Medium-grained somewhat calcareous and somewhat tuffaceous sandstone in calcareous sandstone-siltstone member, about 300 meters above base of Caimito formation.
 W. P. Woodring, 1949. Larger Foraminifera (Cole, 1952 [1953]).
Rio Chilibrillo, 1.5 kilometers below
 bridge on road to Casa Larga.
 Sandy siltstone in calcareous sandstone-siltstone member. W. P. Woodring, 1949. Smaller Foraminifera. Transisthmian Highway, 1 kilometer
 northwest of Madden Highway overpass. Limestone in pyroclastic-clay member. J. R. Schultz and W. P.
 Woodring, 1947.
Madden Highway, 1.7 kilometers
 northwest of Transisthmian Highway underpass. Limestone in pyroelastic-clay member. J. A. Tavelli
 and W. P. Woodring, 1947.
Transisthmian Highway, 2 kilometers
 northwest of Madden Highway overpass. Limestone in pyroclastic-clay moeismber. J. R. Schultz and W. P.
 Woodring, 1947.
Transisthmian Highway, 1.5 kilometers
 south of Rio Chilibrillo bridge.
 Conglomerate near top of pyroclastic-clay member. W. P. Woodring, 1949.
Same locality. Coarse-grained sandstone overlying conglomerate. W. P.
 Woodring, 1949. Not plotted.
Transisthmian Highway, 0.5 kilometer
 north of Rio Chagres bridge. Clay at top of 1)yroclastic-clay member.
 T. F. Thompson and W. P. Woodring, 1949. Also smaller Foraminifera.

 UPPER PART OF CAIMITO FORMATION,
 MIADDEN BASIN, PANAM(

 Rio Chagres about 1.5 miles (2.5 kilometers) above Alhajuela, about 50 to 75 feet (15 to 23 meters) stratigraphically below 17c (5905), in lighter colored limestone. D. F.
 MacDonald, 1911. [A submerged
 locality.] Location approximate.


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


76a I 5906b


77 78 79 so 81






82 82a 83


84a


5905 8399 8398

7289 16932 16929




17494 16930



17941 17942


24






 8




 5a 10



10a 10b


 Description of locality



UPPER PART OF CAIMITO FORMATION, MADDEN BASIN, PANAMI-continued

Same locality, 10 to 25 feet (3 to 7
 meters) lower stratigraphically, in hard limestone. D. F. MacDonald, 1911. [A submerged locality.] Not
 plotted.
Rio Chagres about 1.25 miles (2 kilometers) above Alhajuela, about 50 to 75 feet (15 to 23 meters) stratigraphically below 17b (5904). D. F.
 MacDonald, 1911. [A submerged locality, about 375 meters southwest
 of locality 76.] Not plotted.
Rio Chagres, pebbly limy sandstone
 at Purgatorio, about 2 miles (3.2 kilometers) below mouth of Rio Pequini. E. R. Lloyd, 1919. [A submerged locality, probably about 750 meters northeast of locality 76.]
 Not plotted.
Rio Chilibrillo. A. A. Olsson, 1919.
 [Location indefinite.] Not plotted. Cave near Chilibre River, about 6
 miles (10 kilometers) from Alhajuela.
 August Busck, 1911. [Matrix consists of sandstone. Presumably
 near locality 81.] Not plotted.
Transisthmian Highway, 1.2 kilomneters south-southwest of Rio Chilibrillo bridge, about 150 meters west of highway. Chilibrillo limestone member. J. R. Schultz and W. P.
 Woodring, 1947.
Transisthmian Highway, 650 meters
 south-southeast of Rio Chilibrillo bridge. Calcareous sandstone member. J. R. Schultz and W. P. Woodring, 1947.
 Transisthmian Highway, 75 meters
 south of locality 82. Calcareous sandstone member. W. P. Woodring, 1949. Not plotted.
 Transisthnian Highway, 400 meters
 north of Rio Chagres bridge. Calcareous sandstone member. J. R.
 Schultz and W. P. Woodring, 1947. Transisthmian Highway, west end of
 north abutment of Rio Chagres bridge. Calcareous sandstone member. T. F. Thompson and W. P.
 Woodring, 1949.
 Same locality, but at east end of
 abutment. Calcareous sandstone member. W. P. Woodring, 1949.
 Not plotted.


119