Foerste — Eocene and Miocene of Georgia and Florida. 43 



uted along lines running a little north of east. These lines 

 occurred at such distances apart as to suggest that they repre- 

 sented so many distinct silicified layers in the original Yicks- 

 burg section of this part of Georgia. It also seemed evident 

 that even if not precisely in situ the lowering of these bowlders 

 from their original position must have been of such moderate 

 extent and must have taken place so gradually as not to con- 

 fuse their position in the stratigraphic scale, otherwise the 

 decidedly east and west character of these lines would have 

 been marred, and there would have been a more evident com- 

 mingling of rocks of different lithological character. Since 

 these lines of bowlders furnish information as to the strike of 

 rocks and promise to be of considerable value in working out 

 the stratigraphy of the Vicksburg Eocene of this region the 

 sketch map is here reproduced. It evidently offers materials 

 for a section in which the soft white limestones are omitted 

 and in which only the harder silicified courses appear. 



Description of the Flint River section. Vicksburg. 



(a) The base of the section so far examined is offered by a 

 locality six miles north of Bainbridge, on the west side of the 

 river, near a country graveyard east of the road in the woods. 

 Here massive ledges of siliceous rock of unusual thickness 

 occur, the section being at least 15 feet thick, the usual thick- 

 ness of siliceous layers elsewhere being but 2 to 4 feet. This 

 layer apparently occurs also on the east side of the river at 

 various localities ; in one case, one and a half miles east of the 

 river, between the river road and the western Camilla road, 

 near some plantation houses about 7 miles from Bainbridge ; 

 also still farther east, on the eastern or old Camilla road lead- 

 ing to the limesink, about 8 miles from Bainbridge. This 

 horizon furnishes many fossils though chiefly in the form of 

 casts, and almost all identical with forms found at Bainbridge 

 and at Russell Springs. Owing to its massiveness this layer is 

 more apt to occur as surface exposures and could probably be 

 traced much farther east and west than has been done, thus 

 offering an important datum line in the Yicksburg. 



(5) Above this occurs the Bainbridge marl, exposed along 

 the southern side of the river, at water level, east and west of the 

 steamboat landing at Bainbridge. It is very calcareous, and con- 

 tains many fossils, imbedded in a matrix composed of innumer- 

 able quantities of foraminifera, chiefly Orbitoides in all the vari- 

 ous stages of development, the liner cementing material having 

 in most cases disappeared to such an extent, owing to percolating 

 waters, that it is possible to secure many shells and sea-urchins 



