Processes and Controls on the Intertonguing of the Kayenta and Navajo Formations, Northern Arizona: Eolian-Fluvial Interactions

Contrasting styles of fluvial-aeolian interaction at a downwind erg margin: Jurassic Kayenta-Navajo transition, northeastern Arizona, USA

“…Talbot 1985;Blakey 1988) and the continual interplay between dune and extra-dune processes (Lancaster & Teller 1988;Ward 1988;Langford 1989). Though several studies have documented the regional sedimentology of ancient inland fluvial erg margins (Middleton & Blakey 1983;Clemmensen et al 1989;Langford & Chan 1989), none have provided detailed traverses showing lateral continuity and intertonguing relationships of fluvial and aeolian units on an interwell scale of several hundred metres. Such traverses across the central erg facies of the Middle Jurassic Entrada Sandstone (Kocurek 1981a) have revealed surprising lateral bed thickness variations in a supposedly simple climbing dune--interdune system.…”

Paleontology of the Bears Ears National Monument: history of exploration and designation of the monument

“…In northern BENM and vicinity, the Kane Springs beds are at least partly correlative to the Petrified Forest Member and are the lowest Chinle unit in this area (Blakey andGubitosa, 1983, 1984;Martz et al, 2014Martz et al, , 2017; these strata comprise a complex mix of poorly drained floodplain and meandering stream deposits that sometimes incise as paleovalleys into the underlying Moenkopi Formation (Blakey, 1978;Blakey andGubitosa, 1983, 1984;Martz et al, 2014;Hartley and Evenstar, 2018). The Owl Rock Member overlies these two units throughout BENM, and also comprises well-drained overbank and minor channel deposits (Blakey and Gubitosa, 1983;Dubiel, 1994;Dubiel and Hasiotis, 2011); crayfish burrows extending from channel and levee facies into underlying finer-grained paleosols are common Mitchell, 1989, 1993;Hasiotis, 1995).…”

“…To the north, in the Abajo Mountains and Indian Creek areas, the lower portion of the Chinle Formation is absent, and the base of the unit is equivalent to the Petrified Forest Member elsewhere (Blakey and Gubitosa, 1983;Martz et al, 2014Martz et al, , 2017. In these areas, the recognized subdivisions comprise from oldest to youngest: Kane Springs beds, Owl Rock Member, and Church Rock Member (Witkind, 1964;Blakey andGubitosa, 1983, 1984;Martz et al, 2014Martz et al, , 2017.…”

Paleontology of the Bears Ears National Monument: history of exploration and designation of the monument

“…The Shinarump Member comprises paleovalleys that were incised into the underlying Moenkopi Formation; this unit is dominated by coarse-grained braided stream deposits comprising large river systems flowing to the northwest (Blakey andGubitosa, 1983, 1984;Dubiel, 1983aDubiel, , 1987Dubiel, , 1994. The interfingering and overlying poorly-drained floodplain sediments of the Monitor Butte Member preserve marsh, pond, and small stream environments with a fluctuating water table (Blakey and Gubitosa, 1983;Dubiel, 1983aDubiel, , 1987Dubiel, , 1994Dubiel and Hasiotis, 2011).…”

“…The interfingering and overlying poorly-drained floodplain sediments of the Monitor Butte Member preserve marsh, pond, and small stream environments with a fluctuating water table (Blakey and Gubitosa, 1983;Dubiel, 1983aDubiel, , 1987Dubiel, , 1994Dubiel and Hasiotis, 2011). Laterally, they grade into and are overlain by the braided stream deposits of the Moss Back Member, which represent the larger trunk streams of the same fluvial system (Blakey andGubitosa, 1983, 1984;Dubiel, 1983aDubiel, , 1987Dubiel, , 1994. In southern BENM, the Moss Back is overlain by the well-drained paleosols and meandering stream deposits of the Petrified Forest Member, preserving the increasingly arid and seasonal conditions during the Norian (Blakey and Gubitosa, 1983;Dubiel, 1987Dubiel, , 1994Dubiel and Hasiotis, 2011;Martz et al, 2017).…”