Sedimentology
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Wave‐generated structures and sequences from a shallow marine succession, Lower Carboniferous, County Cork, Ireland
Sedimentology - Tập 24 Số 4 - Trang 451-483 - 1977
ABSTRACTIn a Lower Carboniferous formation south of Cork, Ireland, characterized
by sand/mud alternations at varying scales, several lithotypes could be singled
out on the basis of relative sand content and primary sedimentary structures.
The lithotypes are arranged in several types of sequences: coarsening upwards,
coarsening‐fining upwards, random, and in rare instances: fining upwards.With
incr...
Carbonate platform growth and cyclicity at a terminal Proterozoic passive margin, Infra Krol Formation and Krol Group, Lesser Himalaya, India
Sedimentology - Tập 50 Số 5 - Trang 921-952 - 2003
Abstract The Infra Krol Formation and overlying Krol Group constitute a thick
(< 2 km), carbonate‐rich succession of terminal Proterozoic age that crops out
in a series of doubly plunging synclines in the Lesser Himalaya of northern
India. The rocks include 18 carbonate and siliciclastic facies, which are
grouped into eight facies associations: (1) deep subtidal; (2) shallow subtidal;
(3) sand sho...
Dolomitization, gypsum calcitization and silicification in carbonate–evaporite shallow lacustrine deposits
Sedimentology - Tập 64 Số 4 - Trang 1147-1172 - 2017
AbstractThis paper describes and interprets the mineral and facies assemblages
that occur in carbonate–evaporite shallow lacustrine deposits, considering the
importance of the processes pathway (i.e. dolomitization, gypsum calcitization
and silicification). The Palaeogene deposits of the Deza Formation (Almazán
Basin, central‐northern Spain) are selected as a case study to determine the
variety of...
Precipitation of dolomite using sulphate‐reducing bacteria from the Coorong Region, South Australia: significance and implications
Sedimentology - Tập 52 Số 5 - Trang 987-1008 - 2005
AbstractDolomite was successfully precipitated in culture experiments that
simulated microbiogeochemical conditions prevailing during late stages of
evaporation in ephemeral, hypersaline dolomitic lakes of the Coorong region,
South Australia. Analyses of lake‐ and pore‐water samples document rapid
geochemical changes with time and depth in both dolomitic and non‐dolomitic
lakes. Extremely high sul...
Facies and flow regimes of sandstone‐hosted columnar intrusions: Insights from the pipes of Kodachrome Basin State Park
Sedimentology - Tập 61 Số 6 - Trang 1764-1792 - 2014
AbstractSandstone‐hosted intrusions are found in a wide variety of environments,
but remain poorly understood compared with their mudstone‐hosted counterparts.
In particular, they remain largely unrecognized in the subsurface, in part
because they are problematic to image in seismic data. This study reports on the
facies and fluid flow associated with a 20 000 km3 sandstone intrusion province
in U...
Seismogenically induced fluidization of Jurassic erg sands, south‐central Utah
Sedimentology - Tập 49 Số 1 - Trang 65-80 - 2002
Large bodies of fluidized sandstone occur in the Jurassic Entrada, Carmel, Page
and Navajo Formations at several locations in south‐central Utah. They are most
abundant in the Entrada Sandstone, where they commonly occur in clusters, have a
cylindrical form and have a sharp contact with their cross‐bedded host rock.
These clastic pipes are as wide as 75 m and have exposed heights of as much as
100...
Fluidization and injection in the deep‐water sandstones of the Eocene Alba Formation (UK North Sea)
Sedimentology - Tập 51 Số 3 - Trang 503-529 - 2004
AbstractThe Nauchlan Member of the Late Eocene Alba Formation (UK North Sea)
consists of a deep‐water channel fill that was extensively modified by
post‐depositional sand remobilization and injection. Sandstone textures, facies
associations and the geometry of the channel fill were affected. A suite of
sand‐rich facies was produced by large‐scale fluidization and injection within
the channel fill ...
Postglacial colluvium in western Norway: depositional processes, facies and palaeoclimatic record
Sedimentology - Tập 45 Số 5 - Trang 909-959 - 1998
The postglacial Quaternary colluvial systems in western Norway are arrays of
steep fans, often coalescing into aprons, developed along the slopes of valley
sides and fjord margins. The coarse debris, derived from weathered gneissic
bedrock and its glacial‐till mantle, varies from highly immature to mature. The
depositional processes are mainly avalanches, ranging from rockfalls and
debrisflows to ...
Experimental soft‐sediment deformation: structures formed by the liquefaction of unconsolidated sands and some ancient examples
Sedimentology - Tập 43 Số 2 - Trang 279-293 - 1996
ABSTRACTThe effects of liquefaction in saturated sand bodies under a variety of
driving forces are described from shaking table experiments, and structures from
the geological record are presented which are analogous to the experimental
structures. The collapse of sloping heaps of cross‐bedded sand under a
gravitational body force generates low‐angle, essentially uncontorted
stratification. A basa...
Two‐layer scree/snow‐avalanche triggered by rockfall (Eastern Alps): Significance for sedimentology of scree slopes
Sedimentology - Tập 61 Số 4 - Trang 996-1030 - 2014
AbstractRockfalls that trigger scree‐laden snow avalanches are common in
mountain ranges, but the resulting avalanche development and its role in
understanding the sedimentology of scree slopes are rarely described in detail.
On Riepenwand (2774 m above sea‐level, Kalkkögel range, Alps), on 6 May 2011 a
5800 m3 rockfall of dolostone detached from the flank of a gorge in the upper
part of the mount...
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