NO. IO MISSISSIPPI EMBAYMENT SHORE LINES — COOKE 13 



of approximately 18 miles. Dissected remnants occur at least as 

 far east as Murder Creek. 



Remnants of a plateau near 340 feet at Citronelle, Mobile County, 

 Ala., extend southward for 5 miles and westward for 4 miles onto the 

 Deer Park quadrangle. The relation of this terrace to the typical 

 Citronelle formation should be investigated. 



After a long still stand near 360 feet, sea level receded to about 

 275 feet above its present location, perhaps without an intermediate 

 drop to a lower level. This caused the emergence of the Morley 

 terrace. 



Hazlehurst terrace (shore line 275 feet). — The type area of the 

 Hazlehurst terrace (Cooke, 1925, p. 29) is crossed by the road from 

 Hazlehurst, Jeff Davis County, Ga., to Baxley. This plain slopes from 

 about 260 feet to about 215 feet. As there are still no topographic 

 maps of this area, the limits of the terrace have not been determined. 



The name Hazlehurst was discarded (Cooke, 1931, p. 505) in 

 favor of Brandywine because the Hazlehurst terrace appears to be 

 the same as one at Brandywine, Md., which had been casually referred 

 to as the Brandywine terrace by Clark (1915, pp. 499, 505) in his 

 description of the Brandywine Formation, an older deposit. Later 

 Cooke (1954, p. 204) revived the name Hazlehurst because that 

 terrace is younger than the Brandywine Formation. 



The altitude usually attributed to the shore line of the Hazlehurst 

 ("Brandywine") terrace (Cooke, 1931, p. 505; 1943, p. 104; 1936, 

 p. 130; 1945, p. 248) is 270 feet. A closer approximation is 275 feet. 



The Williana terrace of Fisk (1938a, p. 62) may be equivalent to 

 the Hazlehurst terrace, or its type area may be a reduced remnant 

 of the Morley terrace. Fisk chose as its type area the divide followed 

 by the highway from Alexandria to Winfield in Grant Parish, La., 

 1 mile south of Williana. The altitude there, as shown on the map of 

 the Colfax quadrangle, is about 270 feet. A profile by Fisk (1944, 

 pi. 26) shows part of his supposed Williana terrace well above 500 

 feet. The correlation is certainly questionable. 



The shore line of the largest Hazlehurst bay in the Mississippi 

 Embayment is shown in figure 5. At the 275-foot stage the area 

 covered by tidewater formed a bay more than 100 miles wide at 

 Memphis (fig. 6). Above Helena, Ark., the bay was divided by 

 Crowley Ridge into two long prongs. The western prong reached as 

 far north as the southern parts of Clay and Randolph Counties, Ark. ; 

 the eastern prong extended into New Madrid County, Mo., and Lake 

 County, Tenn. 



