88 



CEO LOGIC A I. REPORT. 



TL33 



(Sec. 14.) 

 SECTION OF OWL CREEK BLUFF, \KAI! RIPLEY. 



The uppermost 2 feet of the lower stratum, is particularly rich in bivalves, 

 mainly Nucula percrassa, Crassatella Iiipleyana, Meretrix Tippana and Dosinia. 

 densata, which frequently occur with both valves still in juxtaposition. Lower 

 down Baculites are very abundant ; they sometimes form beds 6 to 8 inches in 

 thickne-s and several yards in length, which when broken up, exhibit a dazzling 

 play of intense rain-bow tints. 



Most of the fossils mentioned in the catalogue given below (excepting those 

 marked with an asterisk) occur in this locality and are in the collection of the 

 Survey ; many of them being thus far undetermined. Outcrops corresponding 

 to different portions of the sections just given, occur W. of Eipley for 2},.< miles, 

 when (on S. 28, T. 4, R. 3 E.), the soft yellow limestone disappears under the 

 gray clays of the Lignitic, which also overlie it in the northern portion of the 

 town of Ripley. The entire thickness of the calcareous strata overlying the 

 waterbearing sands, as ascertained in w T ells, is about 60 feet. 



133. In S. Tippah, the same strata ciop out on all the tributaries of the 

 Tallahatchie, E. of the line given on the map. One outcrop of the blue marl, at 

 Col. Berry's, S. 4, T. G, R. 4 E., is peculiarly rich in univalves, comprising many 

 species not found on Owl Creek. The most common are Turritdla Tippana 

 and Athlcla leioderma ; a large, beautifully sculptured species of Pyrula, and 

 Indicia perlata also occur. 



On S. 23, T. 5, R. 4 E., at a church near Mr. Stubbs' place, there is an isola- 

 ted cretaceous hill, surrounded on all sides by deep Orange Sand wells. At 

 Ihis spot, in a ravine, the following section obtains : 



