Journal article

The Last Glaciation in Central Magellan Strait, Southernmost Chile

Clapperton C, Sugden D, Kaufman D, McCulloch R ...see all

Quaternary Research, vol. 44, issue 02 (1995) pp. 133-148

  • 27


    Mendeley users who have this article in their library.
  • 112


    Citations of this article.
Sign in to save reference


Glacial landforms and drift stratigraphy in central Magellan Strait, southernmost Chile, document repeated fluctuations during the last glacial cycle of outlet lobes from an ice cap centered over the southern Andes. The lobes developed comparatively low-gradient profiles because of low basal shear stresses over soft deformable beds and this made them sensitive to even small-scale changes in the mass balance. Such low profiles and rapid calving in deep proglacial lakes during deglaciation may have made the Magellan ice lobe particularly responsive to climatic fluctuations during the last glacial cycle, and to advance and retreat over considerable distances. Study of the glacial landforms and drift stratigraphy has led to the identification of at least five glacier advances to limits at and south of the Segunda Angostura. Fragments of mollusc shells contained in basal till indicate marine incursions between some advances, thus documenting extensive deglaciation. A partial chronology based on amino acid studies and radiocarbon dating suggests that five of these advances occurred during the last glacial cycle. The most extensive advances may have culminated during substages of marine isotope stage 5 (substage 5b or 5d) and/or during stage 4. Slightly less extensive advances occurred between ca. 28,000 and 14,000 yr B.P.

Get free article suggestions today

Mendeley saves you time finding and organizing research

Sign up here
Already have an account ?Sign in

Find this document

Get full text


  • Chalmers M. Clapperton

  • David E. Sugden

  • Darrell S. Kaufman

  • Robert D. McCulloch

Cite this document

Choose a citation style from the tabs below

Save time finding and organizing research with Mendeley

Sign up for free