Pg. 710 (fig. 2), 715-716, pl. 1. Recreation red beds. Series of uniformly brick-red fine-grained sandstones. Uniformity broken by conglomerate 5 to 30 feet thick. Thickness 1,265 feet at Gould Gulch. Underlies Amole arkose; overlies Cretaceous volcanics. [Age is Cretaceous.]
Named because of its color and occurrence in Tucson Recreational area [Saguaro National Park]. Practically confined to Red Hills and numerous small outcrops in zone of the great thrust east of Amole Peak, Tucson Mountains, Pima Co., southeastern AZ.

Source: US geologic names lexicon (USGS Bull. 1200, p. 3214).

Revised in Tucson Mountains, Pima Co, AZ, Basin-and-Range province. Recent workers have tended to include assemblage of reddish Mesozoic sedimentary and associated volcanic rocks underling Amole Arkose at Red Hills and Brown Mountain within Recreation Red Beds. Because of lithologic diversity and possible substantial range in ages of this assemblage, Recreation is here restricted to only lower part of sequence following usage of Brown (1939); informal lithologic names are used for overlying map units of sequence because of their limited areal extent and uncertain ages and correlations. Restricted Recreation consists of red-brown mudstone, siltstone, and some interlayered sandstone. Overlies Rainvalley? Formation; underlies Jurassic? basaltic lava flow. Because of lack of unequivocal age determinations, assigned Triassic or Jurassic age.

Source: GNU records (USGS DDS-6; Denver GNULEX).