Formation mechanisms for ice-stream lateral shear margin moraines
The AA. review the characteristics of lateral shear margin moraines and present 2 quantitative models for their formation : 1) differential erosion rates related to lateral variations in the stream velocity and 2) lateral incursion from inter-stream
ridges after the thinner stream retreats, where the shear margin moraine is consequently just a terminal moraine of the inter-stream ridge. The conditions that permit shear margin moraines to form are quite constrained. This is consistent
with the infrequent observations of lateral shear margin moraines.
Vertical movement of isolated oceanic islands at plate margins : evidence from emergent reefs in Tonga (Pacific Ocean), Cayman Islands (Caribbean Sea) and Christmas Island (Indian Ocean) in The geomorphology of plate boundaries and active
continental margins.
This paper examines the evidence for vertical movement of oceanic islands at three plate margin locations. Each is located adjacent to a deep ocean trench, but represents a different plate margin setting from a different ocean. For each of the areas
Soils and associated materials of some pan floors and margins in southern Africa : a review
A review of information on the occurrence, classification, properties and genesis of soils, pedogenic duricrusts and unconsolidated sediments covering pan floors and margins. A three-fold division based on climate was establisehd. - (AJC)
Retrograde dehydration of hornblende in quartzofeldspathic granulites in the Limpopo Northern Marginal Zone, Zimbabwe
This paper focuses on dehydration of hornblende during the retrograde metamorphism to examine the rock-fluid interaction which produced the charnockite-enderbite suites in the Northern Marginal Zone, Zimbabwe, on the basis of available thermodynamic
Ice marginal ramps : an indicator of semi-arid piedmont glaciations
of the temperate/humid zones. For this reason, they are often misinterpreted. Being indicator of ice margins, ice marginal ramps permit the accurate reconstruction of extensive piedmont glaciations in the semi-arid highlands of subtropical latitudes. Because
Hypsometric forcing of stagnant ice margins: Pleistocene valley glaciers, San Juan Mountains, Colorado
Colorado ; Deglaciation ; Glacial valley ; Glacier margin ; Hypsometry ; Model ; Mountain ; Pleistocene ; Quaternary ; Topography ; United States of America
The A. uses the location of stagnant ice deposits in many San Juan valleys, Colorado, to test how valley hypsometry and topographic obstructions influence the type of margin present during valley glacier retreat.
Antarctica ; Earth surface processes ; Esker ; Glacial features ; Glacier margin ; Ice sheets;Ice cap;Inlandsis ; Moraines
The eskers described in this paper have formed on the surface of cold ice at the margin of the Antarctic ice sheet. The location, orientation, sedimentary properties and field relationships of the eskers are described and a model of their formation
Den siste butikken. Marginale kjopmenn og forbrukere i Ostlandets randomrader The last retail outlet. Marginal shopkeepers and consumers in the peripheral areas of eastern Norway