Moreover, the comparatively high proportion of overbank deposits
relative to inchannel deposits designates a broad floodplain across which the channel meandered, or a rapid floodplain aggradation rate relative to the frequency of channel avulsion.
Later they interpreted the clayey deposits of the Gauja RS (clays of the Lode Fm.) as the overbank deposits
and delta plain lakes (Ponten & Plink-Bjorklund 2009).
Lithofacies Association Depositional environment Depositional System D Fluvial channel Meander channels Lateral bars Upper flow regime channel Levee deposits C Swamps Aluvial flooding flat Overbank deposits
Crevasse splay B3 Supratidal zone idal Flat B2 Intertidal zone B1 Subtidal zone A Coastal lagoons Lagoon Table 3.
Crevasse-splay sandstones make up less than ~10% of the thickness of overbank deposits
below 781 m and 30-50% of their thickness above this level.
Nunnally, "Definition and identification of channel and overbank deposits
and their respective roles in flood plain formation," The Professional Geographer, vol.
A cylinder-shaped log motif is indicative of abandoned channels; a bell-shape motif is indicative of point bar deposits and symmetrical to extremely serrated log motifs are indicative of fine-grained overbank deposits
. The petrophysical properties of the Warchha.
Andrew Miall's chapter on alluvial deposits deconstructs river systems into the essential architectural elements of channels, bedforms, and overbank deposits
, such as levees and crevasse splays.
A 35 m core recovered from the floodplain of Raccoon Creek at Granville contains 22+ m of lacustrine and overbank deposits
above wood dated to 15,620 [+ or -] 110 yrs BP (Beta-91907).
Plots for overbank deposits
appear more often to consist of two superimposed plots, as in Figs 5 and 6.
The fossiliferous beds, from the Castor Creek Member of the Fleming Formation, are fluvial overbank deposits
including fossil soils (Jones et al.
The distinct and remarkable facies pattern and associated depositional environments are characterized by yellow brown siltstone offlood plains, massive silica rich off-white to cream colored sandstones ofbeach environment, gray colored sandstones ofdeltas, variegated colored and thinly bedded to alternate laminated sandstone, siltstone and clays of tidal flats as well as massive brown and maroon colored gypsiferous clays of overbank deposits
. Moreover, small scale and locally developed shallow lagoons and estuaries are characterized by thinly bedded and white to buff colored gypsiferous carbonaceous sandstone which is overlain by brown siltsone/claystone with Oyester bank development.