The Ormen Lange turbidite systems: sedimentary architectures and sequence structure of sandy slope fans in a sediment-starved basin - From Depositional Systems to Sedimentary Successions on the Norwegian Continental Margin - page 622

Table 3. ( Continued )

Sedimentary
Architecture

Depositional
sub-environment Facies Association Characteristics Log motif

The
Peripheral
to
Marginal
lobe
association

Layered, commonly coarsen-
ing and thickening to fining
and thinning upwards motifs
or bedsets up to more than
five metres-thick. Compo-
nent facies comprise thin
to thick-bedded Tabcd and
Tbcd turbidite beds as well as
medium to thick-bedded strat-
ified sandstones. Rare and
thin matrix rich debris-flow
or slurry flow deposits occur
infrequent. The sandstones
are separated by thin, eroded
turbiditic and/or hemipelagic
mudstones, or by rare amal-
gamation surfaces.

Peripheral part of
individual lobes
(lobe storeys) in
mid-fan and
outer-fan settings.

D

The Lobe
Fringe
association

Layered, commonly coarsening
and thickening to fining and
thinning upwards motifs or
bedsets up a few metres-thick.
Component facies consist of
thin to medium bedded Tbcd
and Tcd turbidite beds. The
sandstones are separated by
thin to thick, turbiditic and
hemipelagic mudstones.

Outermost margin
of individual
lobes (lobe
storeys) in
outer-fan as
well as mid-fan
settings.

E

The Megabed
association

Variably thick layered packages of
thick to very thick, massive and
stratified sandstones, deformed,
slumped sandstones, and
some rare turbidites. The
sandstone facies alternates
with turbiditic, hemipelagic
as well as pelagice mudstones
and claystones, sometimes
with sandstone injections or
sandstones dikes cross-cutting
mudstone laminations.

Debris flow
tongues and
other mass
transport
deposits in
inner-fan to
mid-fan settings.

F

G The Slump-
Bed
association

Metres-thick packages of
deformed, slumped and
thrust-faulted Bouma-type
turbidites alternating with
coarse to pebbly massive
sandstones.

Slump-folded
channel-mouth
lobes or alterna-
tively overbank
or inter-channel
crevasse splays.

Interbedded hemipelagic and
turbiditic mudstones that
alternates at centimetre to
decimetre scale intervals.
Millimetre to centimetre-thick
silty to sandy (very fine)
distal turbidite stringers and
lamina are frequent in the
turbidite mudstones.
Other intervals are dominated
by alternations of pelagic
claystones and hemipelagic
mudstones.

H The Back-
ground
Slope-
to-Basin
Mudstone
associa-
tions

Slope to inner
basinfloor
mudstone
and claystone
sheets.