FURTHER STUDIES AT VERO, FLORIDA 679 



found in the basal portion of the upper deposit are upstream from 

 the point where the bones in the lower deposit occur. Besides this, 

 two out of the three bones are figured as occurring at a consider- 

 ably higher level than the bones in the lower deposit. At the same 

 time the attitude and appearance of these suggest that they had 

 already moved somewhat down the rather steep slope implied by 

 the depositional lines. 



These suggestive relations occur at the most critical locality. 

 It was here that most of the collecting was done, not only during 

 this later visit, but also during the previous one. From the geo- 

 logical point of view this section is peculiar in that here there has 

 been more obvious scour and fill by the stream than elsewhere. 

 This is made evident by an unusual number of pockets and lenses 

 of sand and muck, as well as rapid dovetailings of layers. It may 

 be worthy of note also that the section here lies beneath the latest 

 channel of Van Valkenburg's Creek. The pockets, "filled holes," 

 lenses, and dovetailings render the identification of the true line 

 between the lower and upper creek deposits both difficult and 

 uncertain. While the line of division is reasonably distinct at most 

 points elsewhere, as on the north bank already noted, it unfortu- 

 nately becomes obscure in this critical section. 



In the course of our examinations there frequently arose ques- 

 tions as to the line of division between the upper and lower deposits, 

 and sooner or later the judgments of all members of the party were 

 more or less involved in these efforts at discrimination. These 

 questions revealed the fact that there were notable differences of 

 opinion as to whether a given bit of a section belonged to the upper 

 or lower deposit. If, as discussion and critical consideration pro- 

 ceeded, there was noticeable a tendency to shift the dividing line 

 in one direction rather than another, it was to give the base of the 

 upper creek filling a lower place in holes and hollows than it had 

 been assigned before. In other words, there was a general dispo- 

 sition, as the result of progressive study, to lower the division line. 

 This justifies the inference that any sharp division of the creek 

 deposits in this portion of the south bank into distinct formations 

 is lacking in complete conclusiveness. 



