Foerste — Eocene and Miocene of Georgia and Florida. 49 



of this group. The finding of Orbitolites Floridana however 

 strengthened us in our belief that this was the Chattahoochee. 

 Three miles north of the limesink is a natural curiosity known 

 as the Blowing Cave. One mile east of the same, 18|- miles 

 northeast of Bainbridge, and 1\ miles north of Whigham on 

 the Whigham-Camilla road, is Barrow's plantation house.* 

 Here Prof. Raphael Pumpelly found abundant masses of coral, 

 identical in species with those to be mentioned later as occur- 

 ring in the basal Chattahoochee, along the Flint River. Their 

 occurrence here strengthens the view that the upper layer at 

 the limesink is also Chattahoochee. The coral layer is known 

 to be present only at a few localities in the basal Chattahoochee 

 in S.W. Georgia. 



2. PoweWs limesink, 7 miles east of Bainbridge, on the 

 Thomasville road, and about 4 miles northeast of Climax has 

 steeply inclined earth covered walls, at the base of which the 

 Chattahoochee limestone is exposed. This is white or grayish 

 white in color, and rather soft in texture, excepting in certain 

 layers, especially at the very base of the Chattahoochee, where 

 the rock is conrpact and hard and contains a few fossils similar 

 to those at Glenn's Well and at Wiley's Bluff. The Yicksburg 

 rock immediately below is very soft, and white, and forms a 

 part of an almost vertical descent into a sort of well or shaft. 

 Towards the top it contains characteristic Yicksburg echi- 

 noids and Pectens, such as are found at Bainbridge. At 

 the base of this shaft were found the concretionary sponges, 

 Orbitoides, and Pecten. Towards one side of the shaft 

 an opening led down gradually into a sort of low long 

 cave, followed by a stream of water. Here a hard rock 

 corresponding perhaps to layer h of the Flint River section 

 was noticed, below which was more soft white rock, with 

 Orbitoides, Pecten, a long lamellibranch shell digging tubes 

 6 inches long into the rock, the bases and lower sides of these 

 tubes being usually occupied by a thin layer of some astrsei- 

 form coral, Cyprsea, and Oerithium Mariannensis. Towards 

 the lower point visited the rock became harder and light 

 brown in color. 



3. At Gieni^s Well, 4 miles south of Bainbridge on the 

 Coon Bottom road, there is only a thin layer of the Chatta- 

 hoochee, the fossiliferous part of which is a white, siliceous, 

 very friable rock. Only the very top of the Eocene is shown. 

 It is hard, partly silicifiecl, brown in color, and contains Orbi- 

 toides, Cerithium Mariannensis, a stray sea-urchin, and other 

 fossils. 



* W. H. Dall, Correlation Papers Neocene, under Georgia. Loc. cit., page 

 447. 



Am. Joub. Sci— Thibd Series, Vol. XLYIII, No. 283 —July, 1894. 

 4 



