Geology Reference
In-Depth Information
Fig. 17.16
Example of outer-estuarine tidal bars in a tide-
dominated estuarine system, Chimney Rock Sandstone. (
a
,
b
)
White, clean sandstones of the outer-estuarine tidal bars are cut
above by central-estuarine tidal channels and inner-estuarine
tide-infl uenced fl uvial channels. (
c
,
d
) The outer estuarine tidal
bars typically consist of inclined sets of bidirectional cross strata
(Modifi ed from Plink-Bjorklund
2008
)
Fig. 17.17
O'Brien Springs and overlying Seminoe sandstones,
interpreted as tide-dominated deltas, Rawlins, Wyoming. These
sandbodies typically occupy a near-maximum regressive position
in clastic wedges, contain no capping delta-plain deposits and
are overlain and underlain by shelf mudstones (photo courtesy
R. Martinsen)
