Pg. E8, pls. 1, 2. Appel Ranch Member of Word Formation. Apple [Appel] Ranch was formerly designated "Fourth Limestone" member of Word Formation (P.B. King, 1931, Univ. Texas Bull. 3038). Type locality herein designated is King's (1931, section 24) where he measured the "Fourth Limestone" as follows: (a) fossiliferous cherty dolomite, 40 feet; (b) gray and brown limestone and dolomitic limestone, containing some chert nodules and many silicified fossils, interbedded with sandy brown limestone and some silicerous shale, 225 feet; and (c) light-gray crystalline limestone, very similar in appearance to Edwards Limestone of the Comanche and contains abundant small brown chert nodules as well as abundant fauna of brachiopods, fusulinids, and other fossils, 260 feet. Member merges into main body of the Word about a mile east of type locality, but can be traced westward nearly to site of Old Willis Ranch. Overlies Willis Ranch Member (new). Underlies Capitan Limestone. Age is Early Permian (Guadalupe).
Type locality: north of the Apple [Appel] Ranch which is about 0.5 mi northeast of site of Old Word Ranch, Hess Canyon quadrangle, Brewster Co., Glass Mountains area, western TX.

Source: US geologic names lexicon (USGS Bull. 1350, p. 29-30).