Submarinevalleys can be subdivided into several types which differ considerably in genesis and morphology| besides submerged fluvial and glacial valleys (inherited relict features), several types of submarinevalleys seem to be accounted
for by turbidity currents, i.e. submarine canyons, submarine gullies, abyssal valleys of continental rise and ocean floor. Rift valleys are formed by tectonics only| tectonic fractures contribute considerably into formation of submarine canyons and transversal
gorges crossing mid-oceanic ridges. Bottom abyssal currents are not sufficiently studied, but it is beyond any doubt that they participate in the formation of submarinevalleys in deep ocean zones, in particular in inter-depression passes. It seems
that valleys due to turbidity currents were greatly influenced by Pleistocene glaciations. Ice edge was often situated close to shelf edge and debris melted from the ice created large turbidity currents which eroded not only continental slope but abyssal zones
Seismic attributes correlated with incised valley thickness in recent stratigraphy of the Sunda Shelf, Indonesia
Indonesia ; Marine seismic prospection ; Pacific Ocean ; Sea floor ; South China Sea ; Stratigraphy ; Submarine geomorphology ; Submarinevalley
A high-quality, large 3D seismic data volume collected in a highly channelized stratigraphic series found in the upper 500 ms of the Sunda Shelf in offshore Indonesia was used to map incised valley development on this shelf. Defined on a seismic
grid at 25-m spacing, 10 valley bases were then exported to ArcGIS, which was used to define each valley's thalweg. Valley-base elevation and several seismic attributes were then extracted along each thalweg. Resulting correlations and relationships
Several abrasion surfaces, erosion net of submerged river valleys of glacial period were found due to research during diving, echosounding, submarine photographing, subbottom profiling and studies of quaternary sediments columns of the Seichell
The insular mounts and some maritime Dinaric Alps at E. Adriatic present a complete Mediterranean altitudinal zonation, from the apical Acromediterranean up to warmest Inframediterranean belts. A correlated submarine horizontal zonation from Thermo
to Bora. The warm intra-montane valleys, and inland dolomitic and ophiolitic mounts present also the relict Mediterranoide ecozonations. The giant kilometric megacliffs of abrupt maritime mountains have a parallel independent zonation of specific rockbush.
, where a submarinevalley was formed. A seismic reflection profile South of Crete may show analogous gravity sliding in the Neogene. From the Late Tortonian till the Pliocene carbonate sedimentation took place. A gradual shallowing followed, wich ended
Entwicklungsprobleme des New Valley, Agyptische Sahara. (Development problems of the New Valley, Egyptian Sahara
(1967-1978) ; Colonisation agricole ; Egypte ; Géographie de l'Afrique ; New Valley Project ; New Valley, rég. ; Peuplement ; Politique agricole
Mise en oeuvre du projet de colonisation agricole et de peuplement de la New Valley, depuis le rapport fait par Schamp en 1967 plus particulièrement. (HSC).
The origin of certain wide valleys in the Canary Islands
Canary Islands ; Geomorphology ; Inverted relief ; Lava flow ; Model ; Valley ; Volcanism
The present work addresses a long-term controversy concerning the origin of Orotava Valley, one of the most peculiar valleys in the Island of Tenerife. Analysis of the key features of Orotava Valley leads to formulation of an hypothesis which could
be applicable to numerous volcanic areas. Such valleys are developed as volcanic valleys undergo lateral expansion due to repeated alternations of processes: initial erosion of the gorges by streams, the burial of the gorges by lava flows, and the inversion
of the relief by erosion at the base of valley walls.
The post to late glacial valley reconstruction on the Haramosh north side (Mani, Baska and Phuparash valleys)
Asia ; Glacial features ; Glacial valley ; Karokoram ; Lateral moraine ; Palaeo-environment ; Postglacial
The history of the landscape of the Haramosh valley is linked with the former glaciation history of the Indus Valley. The extent of the former glaciers Mani, Baska and Phuparash according to their glacio-geomorphic position, their snow line
depression and relative age classification, using the method of Kuhle, is reported in this article. A high glacial ice filling of the Haramosh valley and glacial erosion of the flat top of the Darchan ridge as an intermediate valley head is strongly probable.
A rational explanation of cross-profile morphology for glacial valleys and of glacial valley development
The purpose of this paper is, first to present an explanation of the cross-profile morphology based on the physical process of glacier flow and second to interpret development of the glacial valley cross-profile.
A rational explanation of cross-profile morphology for glacial valleys and of glacial valley development : a further note
The AA. discovered a misinterpretation in their original paper entitled : a rational explanation of cross-profile morphology for glacial valleys and of glacial valley development in earth surface processes and landforms, vol. 13, No 8, p. 707-716
Outlines of the late Quaternary history of the Drentsche Aa Valley (Drente, The Neteherlands)
An outline is given of the geomorphology and Late Quaternary history of the Drentsche Aa valley. The valley sediments are subdivided in fluvial, slope and aeolian sediments on lithological arguments. The vertical succession of the river valley
sediments demonstrates a decreasing fluvial activity during the Weichselian. Tentatively four erosion phases are distinguished in the valley system.
This paper aims to explore the process-landform relationships and potential genetic links between duricrust formation and Kalahari valley development, and hence assess the possible influence and implications of groundwater weathering and erosion
upon duricrusts. This is achieved by consideration of relationships between valleys and duricrusts at a variety of scales (ranging between microscale to valley scale) from three mekgacha systems within the Kalahari: the Rooibrak and Letlhakeng valleys
Problems in automated recognition of valley features from digital elevation models and a new method toward their resolution
Drainage network ; Greece ; Hydrology ; Landslide ; Model ; Numerical model ; Peloponnesus ; Valley
In this paper a new method for recognizing valley bottoms is presented. This is based on two improvements of Carroll's (1983) method, and produces a network that reflects the topography well. The network is used to locate valley heads. Once located
, the valley heads are delineated using criteria suggested by geomorphologists and hydrologists. The resultant valley heads are generally well recognized although two problems are evident : a) there are a number of commission errors; and b) the valley heads
Automated recognition of valley heads from digital elevation models
An automated technique for recognizing valley heads from digital elevation models is presented. The technique has been developed for valley head recognition because valley heads are known locations of geomorphological activity and because areal
features have been largely ignored in the automated landform recognition literature. The problem of valley head recognition is divided into valley head location and valley head delineation, and the technique is developed using a DEM representing a simple