Permian stratigraphy east of Socorro, central New Mexico
— Spencer G. Lucas, Karl Krainer, and W. John Nelson

This paper reviews the Permian stratigraphic section in the Joyita Hills–Cerros de Amado–Carthage area east of Socorro. Here, the Permian section is ~900 m thick and is assigned to the (ascending) Bursum Formation, Abo Formation (Scholle and Cañon de Espinoso members), Yeso Group (Arroyo de Alamillo Formation and overlying Los Vallos Formation divided into Torres, Cañas, and Joyita members), Glorieta Sandstone, San Andres Formation, and Artesia Formation. The Bursum Formation is as much as 120 m thick and consists of interbedded red-bed siliciclastics (mudstone, sandstone, and conglomerate) and marine limestones. The Abo Formation is as much as 210 m thick and consists of siliciclastic red beds divided into the Scholle Member (mudstone with channelized beds of crossbedded sandstone and conglomerate) overlain by the Cañon de Espinoso Member (mudstone, siltstone, and many thin beds of sandstone that display climbing ripple lamination). The lower formation of the Yeso Group, the Arroyo de Alamillo Formation, consists of ~107 m of red-bed siltstone, sandstone (mostly ripple laminated and horizontally laminated with some gypsiferous beds), and a few beds of dolomite. The overlying Torres Member of the Los Vallos Formation is ~156 m thick and mostly consists of gypsiferous siltstone, claystone, gypsum, and a few prominent beds of dolomite and gypsiferous sandstone. The overlying Cañas Member is 66 m thick, consists mostly of gypsum, and includes a few beds of gypsiferous siltstone and dolomite. The Joyita Member is ~12 m thick and consists of siltstone and red-bed sandstone that is crossbedded and ripple laminated. The Glorieta Sandstone is up to 85 m thick and consists of crossbedded, laminar, and ripple-laminated quartzose sandstone. The San Andres Formation encompasses as much as 125 m of mostly limestone (lime mudstone) or mostly gypsum. The Artesia Formation is up to 12 m thick and consists of red-bed siltstone and fine sandstone, with minor beds of gypsum and dolomite. It is overlain by Middle Triassic strata of the Moenkopi Formation. Local paleontological data coupled with regional correlations indicate that the Bursum Formation is early Wolfcampian, the Abo Formation is middle Wolfcampian–early Leonardian, the Yeso Group is Leonardian, the Glorieta and San Andres formations are late Leonardian, and the Artesia Formation is Guadalupian (Roadian-Wordian) in age.