plane bed

plane bed

[′plān ‚bed]
(geology)
A sedimentary bed without elevations or depressions larger than the maximum size of the bed material.
References in periodicals archive ?
4B), normally, these distal flats displays an extensive plane bed. Moreover, estuarine beaches are present only on the inner eastern side and are mostly composed of very fine sand, as well as gravel reworked directly from the cliffs.
(1975), dunes 3D would be developed under flood conditions whereas it would turns upper plane bed during ebb conditions (Fig.
Nevertheless, the expected bedforms according the hydro-sedimentary characteristics of the environment (Harms et al., 1975, diagram) would be plane bed during the maximum ebb and antidunes during the maximum flood, both corresponding with a higher flow regime than the indicated by the observed bedforms.
Furthermore, current ripple cross-lamination, trough cross-stratification and planar stratification were formed by deposition associated with migrating current ripples, dunes, and upper stage plane beds, respectively (Bridge, 1993).
Planar stratification formed under conditions of relatively higher flow velocities associated with upper stage plane beds. Current and wave ripple cross-lamination record deposition by migrating current ripples and wind action in ponded water, respectively.