l6 SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 149 



The western shore line followed the bluff as far as Little Rock, not 

 far from the 360- foot shore. It has not been traced in detail beyond 

 Little Rock, but it probably trends southward across Arkansas to 

 Union County, La., thence south-southwestward to Vernon Parish, 

 La., entering Texas somewhere near the thirty-first parallel of latitude. 



The eastern shore followed the bluffs across Tennessee and Missis- 

 sippi to the Gulf of Mexico, whose shore at that stage crossed the 

 northern tier of the West Florida parishes of Louisiana. This shore 

 of the Gulf is difficult to trace because the terrace there is much 

 dissected. 



The shore of the Hazlehurst terrace is conspicuous on the Gaines- 

 ville, Ark., quadrangle. In section 12, T. 18 N., R. 4 E., a broad 

 plain bordering Cache River abuts a steeper slope at the 275-foot 

 contour line. Similar conditions occur on both sides of Jones Ridge, 

 east of Delaplaine. 



The 275-foot shore crosses the Marmaduke, Ark., quadrangle, 

 separating the Hazlehurst from the dissected Morley terrace on the 

 northwest. The line passes through Marmaduke and Paragould. 



The Hazlehurst shore extends almost due south for 50 miles along 

 the west side of Crowley Ridge, in Craighead County, to Forest Hill 

 in Saint Francis County, following the 275-foot contour line. Part of 

 it near Wynne is shown in figure 6. The opposite shore there is about 

 50 miles away. That the bay east of the ridge, once the valley of the 

 Ohio, was deeper than the western prong, the original valley of the 

 Mississippi, is shown by figure 7, a profile across the Dee quadrangle 

 in the latitude of Trumann. 



The Hazlehurst terrace covers all of the Walnut Ridge, Ark., 

 quadrangle except the northeastern corner, where a short stretch 

 of the shore line is shown. The terrace and the shore extend across 

 the adjoining Powhatan quadrangle, but the terrace slopes gently 

 down to 250 feet at the southern end, following the grade of the 

 drowned valley, and the shore line lies against the bluff. 



A drop in sea level caused the emergence of the Hazlehurst terrace. 



Coharie terrace (shore line 215 feet). — The shore of the Coharie 

 bay (fig. 8) was more crooked. Two prongs near the head were 

 separated by Crowley Ridge and fringes of Hazlehurst terrace. The 

 entrance to the eastern prong, which extended up the drowned valley 

 of the St. Francis River across Poinsett County, Ark., was partly 

 blocked by a 15 -mile-long island, the continuation of Crowley Ridge. 

 This prong was roughly triangular, with one shore trending south- 



