Vol, XXXII, 1887. 
Am, Jour. Sci., 
Plate VI. 
ty As 
i MWoast Platn,— Combination of Topo- 
|| Graphic and Goologteseaturea frome otter 
|| Oui States: Post Cretaceous, Ns 
|| Wack Prairie Hegtorn —Continadion Black 
| Prairie 7 Arkansas, Miss, ot0.Gui Crotaceous.. 
i Sentral Millgor Denuded Area— Cretaceous Basal 
Cuy wid Comanche sertes) CarboriZerous and Pre- 
CortoniferousPaleozorc. 
SCross Timbers. 
I 4Plaloour Hegtor.—Liano Estacatto, Contin na2core of 
i 
| 
| 
(hs 
Great Plates of the Worthwest. 
IMuntninons, orirans Pecositegton.— Disturbed and. 
Lnwplive, Paleczoic Cretaceous. ( Gulf, Comanche and 
Northwesterre. 
| SALIENT 
TOPOGRAPHICFEATURES 
—OFTHE— <I 
STATE OF TEXAS. 
SSN 
Robert T Hill. Ll 
1866. 
= cou cm 
