NO. IO MISSISSIPPI EMBAYMENT SHORE LINES — COOKE 21 



easterly through Memphis, the other southward almost to Marianna, 

 Ark. 



The western prong was roughly rhombic, with one side running 

 from Haynes in Lee County, Ark., to Newport in Jackson County ; 

 another side from Newport along the bluff to Higginson, in White 

 County; and another southeastward from Higginson past De Vails 

 Bluff to Monroe County near Roe. 



From this cape at the entrance to the western prong, the crooked 

 shore wandered past Stuttgart, Tomberline in Loneoke County, and 

 Pine Bluff. From Pine Bluff the shore of the Coharie bay followed 

 the right bank of Bartholomew Bayou about to Warrenton in Lincoln 

 County and thence southward to Paradise in Drew County, which 

 seems a good place to leave it. 



In Louisiana the western shore of the Coharie bay has not been 

 traced in detail. It seems to have lain not far west of the Ouachita 

 River as far as Harrisonburg in Catahoula Parish. Here it met the 

 broad entrance to the combined estuaries of Little River and Red 

 River. 



The Coharie bay was widest between Pine Bluff, Ark., and Bates- 

 ville, Miss., a distance of about 120 miles. A profile across it there 

 is shown in figures 9 and 10. Between Harrisonburg and Natchez, 

 Miss., the bay was less than 30 miles wide. The narrow lower reaches 

 of the bay widened to 50 miles between Catahoula Lake and the 

 opposite cape in West Feliciana Parish, La. 



From this cape the eastern shore extended northward and north- 

 eastward along the bluffs past Natchez, Vicksburg, and Yazoo City 

 to Memphis, from which the eastern prong crossed into Arkansas. 



The shore line at the head of the east prong was very intricate 

 because the old Ohio River (now the Mississippi) and the old Mis- 

 sissippi (now the St. Francis) built deltas across it. Delta building 

 doubtless began while the bay was still flooded and continued after 

 the Coharie terrace emerged. These younger deposits obscure the 

 original shore line in many places, but not everywhere. For instance, 

 at Walnut Grove Corner, near the center of the Dee quadrangle, 

 Ark., a 10- foot scarp rises above the 215-foot level and extends 

 northward for more than 2 miles. Southeast of Harrisburg on the 

 same map the 21 5- foot contour line hugs the foot of Crowley Ridge. 

 On the Marked Tree quadrangle a distributary of the delta now 

 followed by Little River rises above the 215-foot contour line. 



There was also some delta building at the head of the west prong 

 but on a much smaller scale. The old shore line lies at the foot of the 



