444 Bendrat — Notes on Region about Caicara, Venezuela. 



The cliffs along the Caicara side of the Orinoco are evi- 

 dently continuous with the rocks exposed in the southeastern 

 hank and consist of medium-to fine-grained gneiss with lami- 

 nation running N.KE.-S.S.W. or E.KE.-W.S.W. Small 

 quartz veins c\it the gneiss in a general N.W.-S.E. direction. 



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Scale = 1:500,000. 



On the smooth surface of these rocks, about one kilometer 

 north of Caicara, the writer discovered three grooves about 

 four to five inches long and one-eighth of an inch deep which 

 run perfectly straight, one E. 10° JN.E., and the two others E. 

 10° S.E. They look exactly like glacial stria? the writer has 

 observed in various places in the United States. They may, 



