Pg. 244 (fig. 1), 254. Dellvale ash bed of Ash Hollow member of Ogallala formation. Name applied to volcanic ash bed. Thickness at type locality 9.5 feet; occurs within silts and sandy silts which overlie a thick fossiliferous sand and gravel bed. Lies stratigraphically above Fort Wallace ash bed (new) and below Reager ash bed. Age is Pliocene.
Named from exposures southeast of Dellvale, in NW/4 NW/4 sec. 2, T. 4 S., R. 24 W., Norton Co., northwestern KS.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1081).

Pg. 28, 44 (fig. 2), 74-75 (measured section), pl. Dellvale bed of Ash Hollow member of Ogallala formation. Local in geographic extent; recognized in a few places in Norton and Phillips Counties, northwestern Kansas. Notable measured section (Almena section, modified from Frye and Leonard, 1949), in W/2 sec. 16, T. 2 S., R. 21 W., Norton Co., where the Dellvale is 6.5 feet thick, lies about 45 feet above the contact between the Ash Hollow and underlying Valentine member of Ogallala formation; overlies silt and sand beds carrying fossil seed KRYNITZKIA CORONIFORMIS. Age is late Tertiary (Pliocene).
[GNC remark (ca. 2010): Ash Hollow Member later discarded by the Kansas Geol. Survey. See Ludvigson and others, 2009, Kansas Geol. Survey Bull., no. 256, pt. 2.]

Source: Publication.