J.ET.10 CEETACEOTJS FAUNAS OP THE CAEOLIN-AS — STEPHENSOlil' B 



Park, Wilmington, N. C, found among the Geological Survey col- 

 lections, contained six specimens of the echinoid, Linthia variabilis 

 Slocum, described on a following page. 



The South Carolina locality is Mars Bluff on the right side of 

 Peedee Eiver, 3 miles below Peedee village (Atlantic Coast Line E. E. 

 bridge) , Florence County. The section is as follows : 



Section at Mars Bluff, Peedee River, 8. C. 



Pleistocene terrace deposits: Peet 



Yellowish sandy loam, grading downward into mottled red and red 



sandy clay, passing into coarse red sand at base 10 



Light drab clay, with a reddish sand lens reaching a maximum 



thickness of 4 feet, at one place near the base ; 8 



Gravel band with pebbles less than an inch in diameter — -, 0.5-1 



Unconformity. 



Black Creek formation (Snow Hill marl member) : 



Fine light yellowish stratified sand 8 



Dark drab to black finely laminated clay and sand 3-5 



Light yellow, fine-grained, thinly stratified, micaceous sand, mottled 



with pink and red 10-15 



Dark drab laminated slightly lignitic clay, with partings of fine 



micaceous sand and some sand lenses ; contains some comminuted 



plant fragments 2. 5-4 



Light gray friable sandstone with silicified shells, and some lignite 



(see list of fossil organisms below) 0.5-1 



Yellow and orange sand, interbedded with dark drab clay 2 



Fine yellow micaceous stratified sand 2, 5 



Fine compact white and yellow sand 9 



Black shale interstratified with blue sand 10 



The fossiliferous layer indicated in the section was discovered 

 prior to 1908 by the late Dr. Earle Sloan,^ then State geologist, who 

 correlated this part of the section with the Eocene. Several collec- 

 tions were subsequently made at the locality at different times, the 

 last by Dr. Wythe Cooke and me in 1922. The original shell mate- 

 rial has been completely replaced by silica in all the specimens. The 

 following list was prepared from all the available collections : 



Fossils from Mars Bluff, Peedee River, S. C. Collected hy Earle Sloan, Wythe 

 Cooke, and L. W. Stephenson. U. S. G. S. coll. Nos. 3551, 4141, 1U59-1U62, 

 and 11543. 



Ooelenterata : 



Sponge borings in shell of Tellina. 



One unidentified coral. 

 Molluscoidea : 



Bryozoa. 

 Pelecypoda : 



Leda species. 



Striarca pogiiei Stephenson. 



2 Sloan, Earle, Catalogue of the mineral localities of South Carolina, p. 358, 1908. 



