No. used in this report


USGS
Cenozoic No.
































 2683



 2685


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






 41b 18839 209


Field No.







127


 Description of locality



GRAYWACKE GRIT MEMBER OF BOHIO
 FORMATION QUEBRANCHA SYNCLINE,
 PANAMA

South bank of eastward-flowing tributary of Rio Quebrancha, 375 oneters west-northwest of Transisthmian Highway bridge across Rio Quebrancha. Sandy siltstone in basal part of graywacke grit member of Bohio formation. T. F. Thompson and W. P. Woodring, 1949. Smaller
 Foraminifera.

MARINE MEMBER OF BOHIO(?) FORMATION GATUN LAKE AREA, CANAL ZONE

Vamos Vamos station, Panama Canal,
 in a cut about 2 meters above level of canal. Collected by F. Sensa, received from Alexander AgassiZ, 1891. [A submerged locality off Palenquilla Point west of Barro Colorado Island, originally on south bank of French Canal.] Location
 approximate.
Vamos Vamos, lot 1. R. T. Hill, 1895.
 [The six collections frosn Vamos Vamos are presumably from the
 same locality.] Not plotted.
Panama Canal at Vamos Vamos and
 10.5 kilometers from Colon. R. T.
 Hill, 1895. [The designation "and 10.5 kilometers from Colon" should be deleted. Vamos Vamos was about 20 kilometers from Col6n.]
 Not plotted.
 Vamos Vamos, lot 2. R. T. Hill, 1895.
 Not plotted.
 Vamos Vamos, lower bed. D. F. MacDonald and T. W. Vaughan, 1911 (MacDonald, 1919, p. 542, pl. 154).
 Not plotted.
 Vamos Vamos, tpper sandstone. D. F.
 MacDonald and T. W. Vaughas, 1911 (MacDonald, 1919, p. 542). Poorly preserved molds in weathered sandstone. Not plotted.
 East side of promontory 375 meters
 southeast of Palenquilla Point, west of Barro Colorado Island. Loose calcareous concretions at water's edge. T. F. Thompson and W. P.
 Woodring, 1949.
 East side of Palenquilla Point, wide
 cove east of triangulation station.
 Approximately same as locality 41a, but from soft weathered mediumgrained sandstone. W. P. Woodring, 1954. Not plotted.


149


42a 17693 1 149a


42b 42c 42d 42e


149b


17965 1 149c


18837 18835


207 205


 42f 18836 206






 The trails on Barro Colora tervals of I hectometer, starting end of the trail heading toward


115


 Description of locality



 MARINE MEMBER OF BOHIO(?) FORMATION GATUN LAKE AREA, CANAL
 ZONE-cOntinued

 East side of Palenquilla Point, head of
 cove north of triangulation station and southwest of Corozo Island.
 Calcareous concretion in soft sandstone. W. P. Woodring, 1954. Not
 plotted.
 Northeast coast of Trinidad Island.
 Sandy siltstone, basal 3 meters of exposed section. T. F. Thompson and W. P. Woodring, 1949. Also larger Foraininifera (Cole, 1952
 [1953]).
 Same locality and same part of section,
 but from thin calcareous layer.
 T. F. Thompson and W. P. Woodring, 1949. Not plotted.
 Same locality, about 3 meters higher stratigraphically. One-meter ledgeforming silty medium-grained calcareous sandstone containing few small pebbles, few worn small heads of calcareous algae, and worn shell tips of Turritella. T. F. Thompson and W. P. Woodring, 1949. Larger Foraminifera (Cole, 1952 [1953]).
 Not plotted.
 Same locality, sandy siltstone about 4.5 meters stratigraphically above locality 42b. T. F. Thompson and W. P. Woodring, 1949. Not plotted.

 B301IO FORMATION, GATUN LAKE
 AREA, CANAL ZONE

 Barro Colorado Island, northern part of island, stream heading west of Miller Trail near Miller 17,4 about 100 meters above mouth. Somewhat calcareous medium-grained subgraywacke. W. P. Woodring,
 1954.
 Barro Colorado Island, northern part of island, stream southeast of Fuertes House, about 275 meters above mouth. Conglomerate. W. P.
 Woodring, 1954. Not plotted.
 Barro Colorado Island, same stream as that for locality 42e, but about 60 meters upstream and from slide on west side of stream. Poorly sorted subgraywacke. W. P. Woodring, 1954. Not plotted.
do Island have consecutively numbered signs at ing from the laboratory at the launch landing or at the the laboratory.


GASTROPODS: TROCHIDAE TO TURRITELLIDAE


40 40a 40b


42


40c 2687 40d 6028a 40e 6028b


17692


18 19 26


17716 148 18838 208