Pg. G2 (fig. 1), G4 (table 1), G6 (fig. 2), G10-11 (table 2), G50-G51, pl. 1. Buford Member of Saddle Mountains Basalt of Yakima basalt subgroup [informal] of Columbia River Basalt Group. Informal Buford flow of Walker (1973, GSA Bull., v. 84, no. 2, p. 425-430) raised to formal member status. Consists of a single, fine- to medium-grained, sparsely plagioclase- and olivine-phyric basalt flow, 20 to 30 m thick; has reversed magnetic polarity. Conformably overlies Elephant Mountain Member of Saddle Mountains Basalt. Believed to predate Ice Harbor (new) and Lower Monumental (new) Members, both of Saddle Mountains Basalt. Areal extent map shows inferred original distribution in extreme southeast Washington and northeast Oregon (see pl. 1, fig. O). Source unknown. Age is late Miocene, based on stratigraphic relations and paleomagnetics.
Type locality (citing Walker, 1973; see fig. 1, loc. 17, this report): about 7.5 km northeast of Flora, OR, in small quarry on east side of Highway 3 at 4,020 ft (1,225 m) elevation, in NE/4 NE/4 sec. 2, T. 5 N., R. 44 E., Flora quadrangle, Wallowa Co., extreme northeast OR.
Reference locality (see fig. 1, loc. 13 and pl. 1, fig. O): above a white tuff in roadcut along Highway 129, 8 km northeast of Anatone, WA, in SE/4 NW/4 sec. 5, T. 8 N., R. 46 E., Weissenfels Ridge quadrangle, southeast WA.
[Yakima basalt subgroup considered informal and should not be capitalized. "Subgroup" not recognized as a formal stratigraphic rank term (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021).]
[Misprint: US geologic names lexicon (USGS Bull. 1564, p. 22) indicates the age is middle Miocene; should be late Miocene.]

Source: GNU records (USGS DDS-6; Menlo GNULEX); US geologic names lexicon (USGS Bull. 1564, p. 22); Changes in stratigraphic nomenclature, 1979 (USGS Bull. 1502-A, p. A10-A11).