Pacific Coastal & Marine Science Center Bedform Sedimentology
Site: “Bedforms and Cross-Bedding in Animation” FIG. 35.
Structure produced by sinuous, out-of-phase bedforms; eolian
deposits in the Navajo Sandstone (Upper Triassic? and Jurassic)
near Snow Canyon, Utah. Dark spots on the outcrop are bushes
approximately 1 m high. RECOGNITION: This structure is a close
approximation of the computer-generated structures formed by
bedforms with out-of- phase plan-form geometries (FIG. 34).
Several of the most noticeable trough-shaped sets in the center
of the outcrop are truncated relatively symmetrically on their
right and left sides, a characteristic which is not shared with
trough-shaped sets produced by along-crest migration of scour
pits (FIG. 46) or by zig-zagging of scour pits (FIG. 59). The
trough-shaped sets in this deposit are less regular than in the
preceding computer- generated structure but more regular and
organized than in the following computer simulation of bedforms
with pseudorandom crestlines (F