Open AccessRock glaciers, protalus ramparts and related phenomena, Rondane, Norway: a continuum of large‐scale talus‐derived landforms
Author(s) -
SHAKESBY RICHARD A.,
DAWSON ALASTAIR G.,
MATTHEWS JOHN A.
Publication year - 1987
Publication title -
boreas
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.95
H-Index - 74
eISSN - 1502-3885
pISSN - 0300-9483
DOI - 10.1111/j.1502-3885.1987.tb00099.x
Subject(s) - geology , moraine , landform , rock glacier , geomorphology , schmidt hammer , ridge , glacier , terminal moraine , holocene , paleontology , physical geography , geography , compressive strength , materials science , composite material
Talus‐derived landforms from Rondanc National Park, southern Norway, are described and classified as protalus ramparts, valley‐floor and valley‐side talus‐foot rock glaciers, and a ‘push‐deformation’ moraine. A morphological and developmental continuum of talus and derivative large‐scale landforrns is proposed. with simple talus slopes at one end and more complex ridge, lobe and bench forms at the other. The various types of feature probably develop from simple talus slopes via separate developmental routes, rather than as a linear sequence. Lichen size and Schmidt hammer R‐values were used to indicate the relative ages of the features. Although all are thought to have originated during the early Holocene, they differ in the presence or extent of recent activity. Hence an age and activity continuum is also suggested, the recency of activity increasing in the direction protalus rampart → rock glacier →‘push‐deformation’ moraine.