Gregory, H.E., 1917, Geology of the Navajo country; a reconnaissance of parts of Arizona, New Mexico, and Utah: U.S. Geological Survey Professional Paper,p. 93, 161.
The De Chelly and the Meseta Blanca are flat-bedded and thinly bedded siltstone or very fine sandstones that were deposited in a subaqueous and probably marine environment.
Baars, D.L., 1962, Permian System of Colorado Plateau: American Association of Petroleum Geologists Bulletin, v. 46, no. 2, p. 149-218.
...Ranges from 225 feet thick at Pine Springs to 817 feet thick in Canyon De Chelly. Considered to be a composite unit whose members can be defined on the basis of primary sedimentary structures, color, grain size, composition, cementation characteristics, and topographic expression.
Pierce, W.G., 1964, Internal correlation of the Permian De Chelly Sandstone-Defiance Plateau, Arizona; contributions to the geology of northern Arizona: Museum of Northern Arizona Bulletin, no. 40, p. 15-32.
Is a unit of Early Permian, Leonardian age, recognized across northeast AZ from Defiance Plateau, Black Mesa basin, to Marble Canyon of Grand Canyon in Plateau sedimentary province. Overlies Organ Rock Formation of Cutler Group. Underlies Coconino Sandstone. Grades into Schnebly Hill Formation (the newly named replacement term for Supai Formation or Group in Sedona-Oak Creek area). Considered to be an erg-margin ripple-laminated (subaqueous and eolian) to wavy-bedded sandstone. Has several types of sandstone--cross-laminated, ripple-laminated, wavy-bedded, silty. Nomenclature chart. Cross sections.
Blakey, R.C., 1990, Stratigraphy and geologic history of Pennsylvanian and Permian rocks, Mogollon Rim region, central Arizona and vicinity: Geological Society of America Bulletin, v. 102, no. 9, p. 1189-1217.
From: USGS Geologic Unit: De Chelly https://ngmdb.usgs.gov/Geolex/UnitRefs/DeChellyRefs_7852.html