314 T. C. CHAM BERLIN ' 



Creek must of course yet be worked out and put in its place in the 

 history of the formations at Vero. 



On the shelving for the time being of this hypothesis of recon- 

 ciliation an endeavor was made to detect such physical possibilities 

 for faunal deployment as might be implied by the creek deposits 

 themselves, thin as they are. The inquiry brought out the fact 

 that the exposed sections of the creek filling showed distinctly 

 more reworking in some portions than in others, together with the 

 suggestive fact that where the layers were least irregular a fair 

 line of distinction could be drawn between an upper and a lower 

 portion, but that where there was most evidence of scour-and-fiU 

 the line of distinction between upper and lower layers was more 

 obscure and at points quite uncertain. Discussion of the precise 

 line of division between the layers, among the investigators while 

 on the ground, brought out notable differences of opinion, and 

 furthermore opinions were more or less changed as the inquiry went 

 on. As the result of such changes of opinion, the dividing line 

 was more often shifted downward than upward.^ The effects of 

 scour-and-fiU in the more disturbed portions of the deposit were 

 found very notable, and they were more pronounced in and near 

 the critical horizon between the upper and lower deposits than at 

 other levels. Scour holes were traced well down into the horizon 

 assigned to the lower layer (No. 2), and even entirely through 

 it into the marine marl below. It was observed that coquina 

 shells had been carried up across the whole horizon of the lower 

 layer and redeposited in the horizon of the upper layer. A care- 

 ful excavation of a scour hole led to the successive placing of 

 the dividing line between the layers at lower and lower levels, as 

 the work went on, and in the end to the disclosure at the bottom 

 of the hole of the carapaces of two turtles, apparently put there 

 by the swirling water-hole action. 



It was further observed that the portions of the creek deposits 

 most marked by scour-and-fill action were the portions richest in 

 human and extinct vertebrate remains, suggesting some causal 

 connection between the scour-and-fill action and the accumulation 

 of the relics. 



^ For details and illustrations see Symposium 2, Joiir. GeoL, XXV (October- 

 November, 1917), 673-82. 



