A rational explanation of cross-profile morphology for glacialvalleys and of glacialvalley 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 glacialvalley cross-profile.
A rational explanation of cross-profile morphology for glacialvalleys and of glacialvalley development : a further note
The AA. discovered a misinterpretation in their original paper entitled : a rational explanation of cross-profile morphology for glacialvalleys and of glacialvalley development in earth surface processes and landforms, vol. 13, No 8, p. 707-716
The post to late glacialvalley reconstruction on the Haramosh north side (Mani, Baska and Phuparash valleys)
Asia ; Glacial features ; Glacialvalley ; Karokoram ; Lateral moraine ; Palaeo-environment ; Postglacial
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.
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
On the mathematical description of glaciated valley cross sections
Geomorphometry ; Glacial erosion ; Glacial features ; Methodology ; Valley
The AA. examine implicit bias in power-law equation analyses introduced by the use of logarithmic data transformations, and discuss problems associated with cases where part of the original erosional form of the glacial channel or glacialvalley has
been obscured by glacial and post-glacial deposits.
The classic U-shaped valley is a typical expression of glacial erosion, but situations can occur where the glacier effects little to no change in the landscape. Two present-day examples are provided and arguments advanced for this situation
Glacialvalley cross-profile morphology, Tian Shan Mountains, China
Channel geometry ; China ; Comparative study ; Cross section ; Glacial features ; Glacialvalley ; Mathematical model ; Model ; River bed ; Tien Shan
The purpose of this paper is to use the power law or quadratic equations in studying the morphology of glacialvalley cross-sections in the middle and western Tian Shan Mountains, to further examine the evolution patterns of glacialvalley form
Glacial-lake outburst erosion of the Grand Valley, Michigan, and impacts on glacial lakes in the Lake Michigan Basin
Catastrophe ; Flood ; Glacial erosion ; Glacial features ; Glacial lake ; Ice breakup ; Lake level ; Michigan ; Palaeogeography ; Quaternary ; United States
The purpose of this paper is to document the outburst origin of the Grand Valley and to explore the implications of these events upon interpretations of the timing and processes of lake-leved changes in glacial Lake Chicago.
Reversed-polarity glacial sediments and revised glacial chronology, West Branch Susquehana River Valley, central Pennsylvania
Geochronology ; Glacial features ; Glaciation ; Glaciolacustrine ; Lacustrine sediment ; Palaeogeography ; Palaeomagnetism ; Pennsylvania ; Quaternary ; United States of America
The reversed remanent magnetic polarity of glacial and glaciolacustrine sediments at Antes Fort allows for revision of the chronology of pre-Wisconsinan glaciation in central Pennsylvania.
Glacialvalley cross-profile development: the influence of in situ rock stress and rock mass strength, with examples from the Southern Alps, New Zealand
Special issue. Glacial geomorphology: process and form development
Glacial erosion ; Glacialvalley ; Model ; Mountain ; New Zealand ; Shear stress ; Slope gradient ; South Island ; Structural stability ; Tectonics ; Valley
Southern Alps. Finally, a conceptual model is proposed linking the factors involved in controlling glacialvalley cross-profile development. Such a model is required for realistic modelling of valley profile evolution.
The potential influence of in situ rock stress regimes, rock mass strength of the slope rock, and subaerial processes are considered here in some simple models of glacial trough cross-profiles from the vicinity of the main divide of the New Zealand
The influence of rock mass strength on glacialvalley cross-profile morphometry : a case study from the Southern Alps, New Zealand
Geomorphometry ; Glacial erosion ; Glacial features ; Model ; New Zealand ; Rocks ; South Island ; Valley
The purpose of this paper is to examine the model developed by Hirano and Aniya (1988, 1989, 1990) for the development of the glacialvalley cross-profile, and to offer an alternative model using rock mass strength (RMS) and morphometric data
Glacial geomorphology of Bonney drift, Taylor valley, Antarctica
Glacial and paleoclimatic history of the Ross ice drainage system of Antarctica. Special issue
Aerial photography ; Antarctica ; Cold area ; Geomorphology ; Glacial features ; Grain size distribution ; Mass movement ; Moraine ; Quaternary ; Sedimentology
The aim of this paper is to document the response of the East Antarctic Ice Sheet (EAIS) near the Dry Valleys to the excess warmth of the last interglaciation by establishing the behavior of Taylor Glacier. The AA. present a model for the deposition
by Taylor Glacier of Bonney drift in central Taylor Valley. Bonney drift is important because it records the penultimate advance of Taylor Glacier through central and lower Taylor Valley.
A dated landscape history of the Allt nan Uamh valley in the Assynt area is constructed, spanning the last 300 ka, using geomorphological analysis, U-series speleothem dating, and existing cave surveys. The mean rate of valley deepening is estimated
to lie between 47 and 68 m per glacial/interglacial cycle of 100 ka. This, combined with an estimated duration of glaciation, implies glacial erosion rates in agreement with modern process measurements.
Development of glacial-valley cross sections under conditions of spatially variable resistance to erosion
Special issue. Glacial geomorphology: process and form development
Erodibility ; Glacial erosion ; Glacialvalley ; Lithology ; Model ; New Zealand ; Slope gradient ; Spatial variation ; Valley
A simulation model that examines the development of valley cross-profiles as a result of glacial erosion has been constructed by placing a finite-element model for ice flow within an iterative program that modifies channel cross-section form
on the basis of an erosion equation. The simulation model has previously been used to examine how different flow laws, erosion laws and ice discharge histories affect medium-scale landform development. This allows to better understand the development of glacial
Rock strength and development of glacialvalley morphology in the Scottish Highlands and northwest Iceland
Geomorphogenesis ; Glacial erosion ; Glacialvalley ; Highland ; Ice sheet ; Iceland ; Lithology ; Model ; Rock mechanics ; Scotland ; United Kingdom ; Valley
Using data from the Scottish Highlands and northwest Iceland, this study indicates that bedrock strength properties are an important control on the morphology of glacialvalleys. Results indicate that on closely jointed metasedimentary bedrock
of low rock mass strength, broad U-shaped valleys are developed, whilst steeper sided, narrower cross-profiles have been developed on igneous bedrock of high rock mass strength. Findings suggest it is the interplay of the mass strength of the subglacial
bedrock and he dynamic properties of the eroding glacier that control valley morphological development.
Polynomial and power functions for glacialvalley cross-section morphology
California ; Geomorphometry ; Glacial features ; Glacialvalley ; Model ; Mountain ; Quaternary ; Regression analysis ; Sierra Nevada ; Slope profile ; United States of America
An empirical evaluation of glacial trough cross-section shape is performed on seven vertical cross-sections in three Sierra Nevada valleys glaciated during the late Quaternary. Therefore, this study utilizes a datum at the upper valley wall where
lateral moraines, trim lines or erratics can provide a clear limit to the glacial extent based on field evidence. This datum is referenced to coordinates of zero in the horizontal direction and elevation above sea level in the vertical dimension.
The aim of this paper is to produce a detailed geologic record of late Cenozoic glacial and non-glacial sedimentation and paleoclimate change. The Quatermain Mountains are ideal for recording ice-sheet fluctuations and paleoclimate change because
they are adjacent to the East Antarctic Ice Sheet and exhibit a suite of glacial erosional features, semi-arid landforms, and widespread drift and colluvium.
Hypsometric forcing of stagnant ice margins: Pleistocene valley glaciers, San Juan Mountains, Colorado
Special issue. Glacial geomorphology: process and form development
Colorado ; Deglaciation ; Glacialvalley ; 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.
The Cairngorm massif in NE Scotland is an excellent example of a preglacial upland landscape formed in granite. Glacial erosion in the mountains has been largely confined to valleys and corries and so has acted to dissect a pre-existing upland
. Intervening areas of the massif experienced negligible glacial erosion due to protective covers of cold-based ice and preserve a wide range of pre-glacial and non-glacial landforms and regolith. The cliffs that sharply demarcate the edges of glacialvalleys
and corries allow the main pre-glacial landforms to be easily identified. The former shape of pre-glacialvalleys and valley heads can then be reconstructed by extrapolation of contours to provide a model of the pre-glacial relief of the Cairngorms
. This relief model provides a basis for understanding the development of the landscape over timescales of many millions of years, including the role of geology, weathering, fluvial erosion and, lately, glacial erosion in shaping the relief.