Environmental Engineering Reference
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FIGURE 11
Trace fossils from estuarine successions in the Early Triassic Montney Formation.
(A) Description of the cored Montney interval in well 07-14-65-22W6 of the Simonette-Kaybob
area, showing the distribution of physical and biogenic sedimentary structures. (B) Sharp-based
sandstone bed from the bay-center succession. Note the
Lingulichnus
(
Li
) and lingulide escape
traces that move through the event bed. Note also the pyritized burrow fill in the abandoned horizon
beneath the event bed. Well Asplund Creek 04-22-66-23W6, 1980.0 m. (C) Interbedded siltstone
and very fine-grained sandstone with abundant
Lingulichnus
(
Li
), well 7-14-65-22W6, 1928.3 m.
(D) Laminated siltstone with abundant tiny vertical traces (cf.
Trichichnus
,
Tr
), well 7-14-65-
22W6, 1928.3 m. (E) Bioturbated siltstone with sharp-based (load-casted) bioclastic sandstone
bed (above dashed line). The siltstone contains a low-diversity assemblage of
Palaeophycus
(
Pa
)
and
Planolites
(
Pl
). Asplund Creek 04-22-66-23W6, 1975.3 m. (F) Low-angle, heterolithic siltstone
and very fine-grained sandstone containing
Conichnus
(
Co
),
Planolites
(
Pl
), rare
Skolithos
, and
escape traces. This succession was deposited in an intertidal-bar setting. Asplund Creek 04-22-
66-23W6, 1980.5 m. (G) Low-angle, heterolithic siltstone and very fine-grained sandstone contain-
ing two different sizes of
Planolites
(
Pl
). The low-angle cross-stratified sandstone near the top of
the succession contains abundant, admixed, sand-sized bioclastic detritus. This succession was
deposited in an intertidal-bar setting. Asplund Creek 04-22-66-23W6, 1982.8 m.
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