Piecing together the Lateglacial advance phases of the Reussgletscher (central Swiss Alps)
<p>Exposure dating has substantially improved our knowledge about glacier advances during the Younger Dryas (YD) and the early Holocene. The glacier development after the Last Glacial Maximum (LGM) and the timing of morphologically evidenced, earlier Lateglacial re-advances is, however, st...
| Main Authors: | , , , , , |
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| Format: | Article |
| Language: | deu |
| Published: |
Copernicus Publications
2018-09-01
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| Series: | Geographica Helvetica |
| Online Access: | https://www.geogr-helv.net/73/241/2018/gh-73-241-2018.pdf |
| Summary: | <p>Exposure dating has substantially improved our knowledge
about glacier advances during the Younger Dryas (YD) and the early Holocene.
The glacier development after the Last Glacial Maximum (LGM) and the timing
of morphologically evidenced, earlier Lateglacial re-advances is, however,
still widely unknown. In this study we used <sup>10</sup>Be surface exposure and
radiocarbon dating to address these phases and corresponding landforms in
the catchment of the former Reussgletscher (central Swiss Alps). We obtained
clear indication for moraine deposition prior to the YD. The oldest samples
predate the Bølling–Allerød interstadial (<i>></i>14.6 ka).
Morphostratigraphically even older lateral moraines, probably corresponding
to terminal positions in the Lake Lucerne, could not be dated conclusively.
Due to the geomorphological constraints of the sampling environment, the
establishment of a local pre-YD chronology remains a challenge: moraines
with adequate numbers of datable boulders were rarely preserved, and age
attributions based on few samples are complicated by outliers.</p> |
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| ISSN: | 0016-7312 2194-8798 |