Sedimentarysequences from three adjacent hollows in northern Lesotho are described. Marked changes in the sediments between 5000 BP and 900 BP indicate climatic changes in the late Quaternary Period. - (AJC)
Eemian and Holocene sedimentarysequences on the Belgian coast and their meaning for sea level reconstruction in The Quaternary and Tertiary geology of the Southern Bight, North Sea.
The Quaternary deposits of the easter part of the present-day Belgian coastal plain comprise two major marine sequences : Holocene and Eemian sedimentary layers. These sequences are composed of coastal, nearshore, perimarine and tidal flat deposits
. In this paper emphasis is put on the comparison of these marine sequences.
This paper presents a sedimentological, palynological, and phytolith record from a 13 m deep Holocene sedimentarysequence, located in the Tsoaing River valley, southwestern Lesotho. Phytolith and pollen in the terminal Pleistocene layers confirm
Eemian and Holocene sedimentarysequences on the Belgian coast and their meaning for sea level evolution in International Colloquy on the Quaternary and Tertiary geology of the Southern Bight, North Sea. Collected abstracts. Oral presentations.
Sedimentary architecture and growth pattern of turbidite systems in distal part of a median fan; example of the Upper Miocene sedimentarysequence of the Lower Congo basin
The observations and interpretations that the AA. propose are derived from 3D seismic data provided by TOTAL. They provide insight into the history and sedimentary mechanisms that induce a seismic pattern and that are recurrent and dominant
: the well developped sedimentarysequence of Sicilian origin and the reduced Aerolian volcanic sequence. The volcanic sedimentary unit is affected by a series of slides| the partial denudation of the volcanic cone can explain the preservation of the initial
A high resolution seismic study in the northern Sicilian basin, between Cape Milazzo and Aeolian Archipelago emphasizes the connection between the sicilian metamorphic basement and the volcanic body. The sedimentary cover includes two units
The Mai Maikden sedimentarysequence : a reference point for the environmental evolution of the Highlands of Northern Ethiopia
Alluvium ; C 14 dating ; Climatic variation ; Ethiopia ; Holocene ; Palaeo-environment ; Palaeovalley ; Sedimentary ; Travertine
This paper presents a geomorphologic-stratigraphic analysis of a travertine dammed lacustrine-swampy sedimentarysequence, composed of clay, peaty layers and phytoclastic travertine sands, deeply incised by the Mai Maikden river, on the Highlands
Several occurrences of metamorphosed pre-Hercynian volcanic rocks crop out in the Paleozoic basement of Southern Sulcis (SW Sardinia), hosted in Cambrian-Early carboniferous sedimentarysequences belonging to two different structural units. - (NF)
d'une séquence de grès d'Amérique du Nord montre les relations existant entre maturité de texture et maturité minéralogique. L'ordonnancement bidimensionnel des caractéristiques de faciès de milieux de sédimentation sableuse reflète bien les contraintes
In the beginning general problems of recognition and interpretation of sedimentary cycles in Upper Palaeozoic molasse sequences are discussed. Exemples of cycles from Variscan outer and inner molasse demonstrate the use for correlation and genetic
Paleomagnetic data bearing on the age of high terrace deposits (Durance sequence) in Alpine valleys of southeastern France
The section contains two sedimentary cycles with opposite polarities, which are therefore placed on either side of the Brunkes-Matuyama boundary. Taking into account the morphological relations to the upland morainic system the youngest high terrace
Allemagne de l'Ouest ; Atlantique ; Frisonnes îles ; Géographie de l'Europe ; Littoral ; Mer du Nord ; Plaine allemande du Nord-Ouest ; Quaternaire marin ; Séquence sédimentaire ; Transgression holocène ; Wadden
To demonstrate the diverse Holocene developments in the region of the North Frisian Islands, the sedimentarysequences of the coastal Holocene in the areas of Sylt and Pellworm are compared. Local factors have to be considered in time and space
Development and evolution of sedimentary environments during the Holocene in the Western coastal plain of Belgium
Interrelationship of different depositional sedimentary environments in their areal distribution and through time in a sandy area of the western coastal plain. This area is used to be interpreted as the result of one single post-Roman erosive
phenomenon. The study of the entire Holocene sequence and the three-dimensional view of it showed the existence of a depression in the pre-Holocene surface where initially a tidal flat came into being in which tidal channels developed. (LW).
Weathering and geochronology of a quaternary paleosol sequence in lower Teleki Valley, Mount Kenya
Climatic variation ; Dating ; Geochronology ; Interglacial ; Kenya ; Mount Kenya ; Paleoclimatology ; Paleosols ; Quaternary ; Sedimentary ; Valley
A sequence of paleosols investigated to reconstruct the weathering effects and climatic intensities that occurred during three interglacial periods on Mount Kenya. Scanning electron microscopy of the sand fractions in these paleosols reveals
Sediment transport processes in pool-riffle sequences
Carrying capacity ; Channel geometry ; England ; Flood ; Fluvial processes ; Grain size distribution ; Hydrodynamics ; Northumberland ; River bed ; Sediment transport ; Sedimentary structure ; Stream ; Threshold ; Tracer ; United Kingdom
This paper reviews the published data for sediment transport in pool-riffle sequences which suggests that a velocity or shear stress reversal hypothesis does not explain all of the published evidence of sediment transport. This conclusion