Bibliographic Details
| Title: |
The deglaciation of Lake Pukaki, South Island, New Zealand—a review. |
| Authors: |
Barrell, David JA1 (AUTHOR) d.barrell@gns.cri.nz, Read, Stuart AL2 (AUTHOR) |
| Source: |
New Zealand Journal of Geology & Geophysics. Mar2014, Vol. 57 Issue 1, p86-101. 16p. 6 Color Photographs, 1 Diagram, 2 Charts, 2 Graphs. |
| Subjects: |
Glacial melting, Stratigraphic geology, Ablation (Glaciology), Diatoms, Phytoplankton |
| Abstract: |
The last major ice advance of the Pukaki Glacier and subsequent onset of retreat occurred at c. 18,000 cal yr BP, and c. 400 m of ice surface lowering occurred prior to 16,165 ± 887 cal yr BP. Sediments and landforms near the lake outlet indicate initial formation of the lake somewhere between c. 510 and 520 m above sea level (asl), with initial lacustrine deposition of ice-proximal well-bedded Fancy Sands and localised coarse angular gravel accumulations likely derived from melting icebergs. Rapid ice retreat formed a large lake, at least c. 30 km long, at c. 510 m asl, with lacustrine deposition near the outlet of silty clay (Pukaki Pug) which contains as much as 40% diatoms. An age of 13,492 ± 293 cal yr BP for a piece of wood from Pukaki Pug is a minimum for withdrawal of the Pukaki Glacier from the outlet area. [ABSTRACT FROM AUTHOR] |
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| Database: |
Engineering Source |
