2,2 ROLLIN T. CHAM BERLIN 



country immediately northwest of Vero. In spots the thickness 

 was less, but at other points, no doubt, dunes as well as beach 

 ridges made its total more than this. A widespread peaty layer 

 at the top of this formation strongly suggests that, following the 

 deposition of these sands, bog conditions existed for a period in 

 the area west of the spillway. The upper two or three feet of the 

 sands of layer b are very firmly cemented by iron oxide, and are 



Fig. 6. — Section of uplands, exposed in north bank of drainage canal, one-third 

 mile southwest of spillway: B represents layer b, consisting of indurated black sand 

 or sandstone, capped in the left half of the picture by peat (layer c) ; D is layer d, white 

 eolian sands, resting upon the Pleistocene bog surface. Above is the material exca- 

 vated in making the canal. 



deeply stained by organic matter, implying that this horizon con- 

 stituted the subsurface for a long time. Iron oxide cement is, as 

 is well known, common in bog deposits. A reason for an extensive 

 wet area, or bog, to the west of the spillway is readily found in 

 a broad beach ridge near the spillway which interfered with the 

 drainage of the tract lying west (see Fig. i). 



The present coast, in a way, serves as an example of similar 

 relations. The east coast of Florida is flanked by a barrier sand 



