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Aspects of the geomorphology of the Greywacke Ranges bordering the Lower and Middle Waikato Basins

Abstract
The fault-bounded blocks which make up the Greywacke Ranges bordering the Lower and Middle Waikato Basins have a deep red-weathered regolith and are covered by mantles of volcanic ash which can be used for dating ground surfaces. The drainage texture is exceedingly fine compared with that of Dartmoor (U.K.) and Unaka Mountains (U.S.A.) This is attributable to rainfall type, regolith, vegetation cover and soil physical properties. The major types of mass movement are deep fossil slumps on upper slopes where the regolith is deep; debris slides on mid- and lower slopes where the regolith is thin; and seepage heads controlled by ground water conditions. The valley floors show both stream incision, and aggradation resulting from infill with mass movement debris. Deforestation has increased the frequency of mass movement during high intensity rainstorms and the slopes are at present becoming adjusted to changed equilibrium conditions.
Type
Journal Article
Type of thesis
Series
Earth Science Journal
Citation
Selby, M.J. (1967). Aspects of the geomorphology of the Greywacke Ranges bordering the Lower and Middle Waikato Basins. Earth Science Journal, 1(1), 37-58.
Date
1967
Publisher
Waikato Geological Society, The University of Waikato
Degree
Supervisors
Rights
© 1967 Waikato Geological Society, The University of Waikato. All items in Research Commons are provided only to permit fair dealing for the purposes of research or private study. They are protected by copyright with all rights reserved unless otherwise indicated.