5Element
Element
Extent
Facies Associations
Comment
Multi-storey and
Multi-storey
Laterally
Multi-Lateral
and
Channel
Elements
Interpretation
Gm (conglomerate of intra and extra
Bases
are
Deposition in periods of high sediment
over 100- 5000 m,
formational
commonly erosive. Burrowing
influx and low accommodation led to
lateral Channel
vertically
bedded
and root mottling are absent.
preservation only of channel elements.
(F1)
thickness >10 m
sandstone; Sm.
Single-storey
Laterally
5- 20 m wide and ~5 m
Composed of Gm (all clast compositions);
Often associated with overbank
Isolated channels are common adjacent
Channel
Isolated Single
deep,
horizontally bedded sandstone, Sh; ripple
elements. Scattered burrows
to salt diapir’s, in areas of higher
Elements
Storey Channel
laminated
on channel bases.
accommodation space where overbank
Element (F2)
sandstone Sm; basal lags of Gm; fining
Group
Multi-
extensive
stacked
composition);
sandstone,
sandstone,
St
Sr
trough
and
and
cross
massive
massive
of
channels
sediments were preserved and not re-
upward cycles common.
worked by subsequent fluvial activity.
Homogenous
Laterally restricted 1-
Channel fill composed of one facies type
Typically the smallest channel
Isolated channels may be associated
Channel-fill
20 m in width and 0.5 -
commonly massive,
element
with crevasse splays and minor fluvial
Element (F3)
5
bedded sandstone, St; ripple laminated
m
deep;
where
laterally amalgamated
Sm; trough cross-
seen.
Scattered
burrowing on base.
activity.
sandstones, Sr or laminated muds/silts fl.
Deposition in waning flows represented
extend for > 100 m’s.
by transition from trough cross-bedded
Interbedded
1- 25m wide, <1 m -
Horizontally bedded sandstone, Sh; trough
Commonly
with
sandstone
Channel-fill
5m deep
cross-bedded
unconfined sheet elements and
sandstone.
Element (F4)
Fluvial
Channelized
Non-
St;
massive
associated
to
ripple
laminated
sandstone Sm-a & Sm-b.
overbank elements.
of
Ripple laminated sands, Sr; silts, Fl-a;
Commonly highly root- and
The
very-fine-
mudstones, Fl; planar laminated sandstones,
burrow-mottled,
mica
laminated to massive sandstone and
grained sandstone, and
Sh; thinly bedded (0.01 to 0.2 m); very-fine-
content. Small circular, dark-
siltstone sets represents a reduction in
rare silt, packages. <
to fine-grained sandstone sets
red-brown
flow; the abundance of burrowing
100m in lateral extent,
compound cosets up to ~5 m thick and these
imprints are also observed on
suggests
commonly < 10 m.
are commonly stacked with silt-rich sets.
some silty bedding surfaces.
reworking
Overbank
Interbedded
Element (F5)
fine-
Element
sandstone,
to
sets
form
High
coloured
rain
transition
there
of
from
was
ripple
only
previously
cross-
limited
deposited
sediments by physical processes.
Sheet-like
Laterally extensive for
Massive, Sm-b, sheet –like, fine to medium
Laterally, more extensive sheet-like
Element (F6)
100’s
grained sandstones, with some bimodal
associations are likely formed by
laminations, commonly occur as individual
unconfined flows over large areas.
m.
thickness’.
Varying
beds of varying thickness. Scattered ripple
laminated sandstones, Sr.
Aeolian Elements
Aeolian Dune
Occur
as
sets
(A1)
cosets up to ~5m;
laterally
difficult
trace;
with
and
Cross bedded aeolian dune, Ad; and massive
Bleaching is common on the
Low angle cross-bedding with a distinct
aeolian facies, Am.
forsets and along the bases of
sigmoid
to
sets; cross bedding is planar or
crested dune field migration indicative
the
sigmoid and is typically low-
of
angle-inclined.
direction.
exception of the nose
a
shape
fairly
is
consistent
constant
with
palaeowind
of the Onion Creek
diapir.
Aeolian
Laterally
restricted
Wavy, Aw; plane, Ap; and mud laminated,
Commonly
interfinger
with
Damp to wet interdune conditions are
Interdune (A2)
packages which are ~<
Amd, interdune facies. Interbedded between
deposits of aeolian dune and
indicated by the wavy laminated facies
1m thick.
sets of aeolian dune strata or immediately
fluvial overbank elements; root-
and
laterally adjacent to them.
and burrow-mottling.
overbank elements (cf. Mountney and
interfingering
Thompson,
2002;
of
facies
Mountney
with
and
Jagger, 2004, Cain and Mountney,
2011).
Aeolian
Extends over 10’s m,
Mixed laminated and cross laminated facies,
Form
Sandsheet
tracing is difficult given
Ami, and convoluted facies, Adi.
elements and are commonly
laterally
indicates
Elements (A3)
nature of outcrop and
observed
stratigraphic
bedforms episodically migrated across
fluvial channel incision.
intervals where aeolian dune
the sandsheet surface; there was likely
elements are not.
some degree of stabilization of the
at
extensive
The presence of scattered cross sets
that
small
dune-scale
sediment surface due to colonisation by
vegetation, episodes of damp surface
conditions
are
recorded
presence
of
wavy
(Mountney & Jagger, 2004).
Table S2: Architectural elements of the Undifferentiated Cutler Group in the Salt Anticline Region.
by
the
lamination;