Showing papers in "Sedimentary Geology in 1994"

TL;DR: In this article, the authors describe an alternative approach to varietal studies that concentrates on relative abundances of minerals that are stable during diagenesis and have similar hydraulic behaviour, described as index values (ATi, RZi, MZi and CZi).

TL;DR: The authors synthesize major, trace, and rare earth element (REE) data in bulk chert from 49 sequences from continental margin, pelagic, and ridge-proximal environments, ranging in age from Early Paleozoic to Neogene.

TL;DR: In this article, the breakdown of depositional cycles produced by changes in relative sea-level and sediment supply into systems tracts is discussed from a theoretical point of view, with emphasis on a systematical discussion.

TL;DR: In this paper, the C40 index and the RA index were used to describe the aggregate shape and roundness characteristics of glacially transported clasts in glacigenic deposits, and the results showed that these aggregate clast form gradients reflect changes in the relative proportions of actively and passively transported debris on the moraines rather than progressive modification of actively-transported clasts.

TL;DR: The Messinian (Late Miocene) marine stratigraphic record of the Sorbas Basin (S.E. Spain) is well preserved and can be considered as being representative of the entire western Mediterranean.

TL;DR: In this paper, Esker ridge morphology is attributed to synchronous erosion, transportation and deposition along the main conduits, such that ridge discontinuities are primarily explained as zones of non-deposition during esker formation.

TL;DR: The authors compare and contrast the sedimentology and structural geology of a Quaternary glaciomarine site (Melabakkar-Asbakkar, Iceland) and a quaternary subglacial glaciotectonic site (West Runton, UK).

TL;DR: The mid-Cretaceous to Eocene flysch deposits of the Xigaze forearc basin in southern Tibet were investigated in a 120 km segment along the Indus-Yarlung suture zone.

TL;DR: The Bornhoved tunnel valley is a polygenetic feature that resulted from different erosional processes throughout all three main glaciations in northern Germany as discussed by the authors, and it is suggested that the initiation of the tunnel valley was controlled by a differential response of the bed materials to ice overriding on top of and between the salt structures.

TL;DR: In this article, a transect of 14C-dated sediments across the centre of the Eucla Shelf is the first record of Holocene shelf deposition in the Great Australian Bight.

TL;DR: Two of the best preserved examples, at Mount Pinafore (Alexander Island; 5.5-6 Ma) and Brown Bluff (Graham Land; c. 1 Ma), are complete enough to be regarded as sequence holotypes for this uncommonly preserved eruptive/depositional setting as mentioned in this paper.

TL;DR: In this paper, it was shown that sand grains are of marine origin and are fractions of deposits in marshy ponds, transported from the littoral environment by a great flooding of seawater.

TL;DR: In this paper, it is suggested that mega-scale glacial lineations were formed under conditions of fast ice flow and their presence may thus record former locations of ice streams or surge events.

TL;DR: The Murree Supergroup of northern Pakistan is represented by an over 6 km thick succession of deltaic redbeds and intercalated impure foraminiferal limestones of latest Palcocene to Middle Eocene (Ilerdian to Lutetian) age as mentioned in this paper.

TL;DR: The Upper Devonian Chattanooga Shale of central Tennessee, a classical black shale, was deposited in an epicontinental setting, west of the Appalachian foredeep as discussed by the authors, and its finely laminated and highly carbonaceous nature is commonly interpreted to indicate deposition in comparatively deep and stagnant water.

TL;DR: In this article, a series of satellite images covering the last fifteen years has provided insight in the evolution of the river pattern as well as the progradation of the delta front.

TL;DR: In this article, 15 soil geomorphic units have been delineated from the Gangetic Plains between the Ramganga and Rapti rivers by remote sensing and field checks and grouped into five members of a soil chrono-association.

TL;DR: In this paper, the authors used groups of five stations (comprising a central station and four satellite stations) for each trend vector, where grain-size parameters are first combined in such a way that bias towards any one of them is climated.

TL;DR: The Cambro-Ordovician molassic Guaritas Sequence (Camaqua Basin, southern Brazil) comprises alluvial-fan and braided fluvial sandstones and conglomerates with intercalated aeolian and lacustrine-deltaic deposits and andesitic lava flows.

TL;DR: In this article, the authors studied the geomorphology of coal deposits in deltaic, estuarine, and coastal plain settings and used a knowledge of interrelationships between the tectonic and depositional elements active at the time of sediment deposition to formulate basin scale models.

TL;DR: In this article, three separate processes of condensation are distinguished: stratigraphic, sedimentary and taphonomic, which can be used to analyze patterns of sediment distribution, and also to estimate lateral and vertical variations in sedimentation rates.

TL;DR: In this paper, hairpin erosional marks are interpreted as being products of scour by horseshoe vortices in turbulent fluids, which is supported by the close similarity of these marks to scours produced experimentally and in nature by horseseshoe Vortices.

TL;DR: In this paper, the authors used accelerator mass spectrometer (AMS) radiocarbon dating of planktonic foraminifera to evaluate the times of emplacement of recent deep-sea turbidites.

TL;DR: Salda Golu as discussed by the authors is a highly alkaline (pH > 9) freshwater lake in which composite stromatolites several metres high are formed by microbially induced precipitation of hydromagnesite.

TL;DR: In this article, a detailed description and interpretation of mainly volcaniclastic sediments related to excellently exposed oceanic volcanic arc successions in the Ladakh Himalayas is given.

TL;DR: In the Tuamotu Archipelago, modern calcareous stromatolites known as kopara have been found accreting on the bottom of shallow (generally < 1 m depth) lakes located on the rims of these French Polynesian atolls as discussed by the authors.

TL;DR: In this article, periglacial, fluvial strata of Late Ordovician age, infilling incised palaeovalleys in the lower part of the shallow-marine, siliciclastic Khreim Group are described from outcrops in south Jordan.

TL;DR: In this article, the authors used the analysis of the lithofacies association, ichnofossil content, together with the architecture of fluvial and paralic sandstone bodies, to reveal the development of the depositional environments of the Cambrian deposits of Jordan.

TL;DR: The Maastrichtian-Lower Paleocene Itilli slope succession of Nuussuaq, West Greenland consists of an at least 2.5 km thick turbidite succession as discussed by the authors.

TL;DR: In this article, a detailed study in Maihar, Madhya Pradesh, reveals upward transition from marine to fluvial through a mixed facies association also bearing eolian imprints.