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| Titel |
Linking glacial melting to Late Quaternary sedimentation in climatically sensitive mountainous catchments of the Mount Chlemos compex, Kalavryta, southern Greece |
| VerfasserIn |
Richard Pope, Philip Hughes |
| Konferenz |
EGU General Assembly 2014
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 16 (2014) |
| Datensatznummer |
250095451
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| Publikation (Nr.) |
 EGU/EGU2014-10905.pdf |
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| Zusammenfassung |
| Compared to the mountainous areas of northern Greece (e.g. Woodward et al., 2008), the
influence of deglaciation cycles on sedimentation in mountainous catchments in southern
Greece remains poorly understood due to the poor preservation of small moraines and limited
opportunities to date glacial and fluvial sediment dynamics fluvial sediments (Pope,
unpublished data). Nevertheless, intriguing new insight into links between glacial cycles and
sediment transfer/deposition phases in upland catchments have emerged by applying
multiple dating techniques to well-preserved multiple generations of moraines and
extensive glacio-fluvial fan systems on Mount Chelmos (2355 m a.s.l.). U-series
dating of calcites within proximal fan sediments constrain the earliest phase of
glacio-fluvial sedimentation to 490 (±21.0)(ka (MIS 12), while OSL dating of fine sands
constrains the deposition of extensive medial glacio-fluvial gravels in (valley we
walked down through trees) to between 250.99 (±20.67) and 160.82 (±11.08)
ka. By comparison, cosmogenic dating of moraine boulders indicates that three
generations of well-preserved moraines in the highest cirque areas date to 31-23 ka, 17-16
kaand 12-11.5 ka. OSL dating also provides ages of 18 and 17 (±11.08) for an
extensive glacio-fluvial terrace in a major valley draining the southern flanksof
Mount Chelmos. The initial Mount Chelmos geochronology suggests that the earliest
and middle phases of glacio-fluvial sedimentation are coincident with the Middle
Pleistocene glacial stages stages recorded in the Pindus range (Hughes et al, 2006). These
include the Skamnellian (MIS 12) and the Vlasian (MIS 6) Stages as well as other
cold stage between these (e.g. MIS 8).Evidence of glacio-fluvial outwash in MIS 8
is interesting since evidence for this in the moraine records has remained elusive
although is suggested further north in the Balkans (Hughes et al., 2011). The valley
moraines and glacio-fluvial terraces (late MIS 2) post-date the local last glacial
maximum and are coeval with the later part of the Tymphian stage in the Pindus
range.
Refs:
Hughes, P.D., Woodward, J.C., Gibbard, P.L., Macklin, M.G., Gilmour, M.A. & Smith
G.R. (2006) The glacial history of the Pindus Mountains, Greece. Journal of Geology 114,
413-434.
Hughes, P.D., Woodward, J.C., van Calsteren, P.C. and Thomas, L.E. (2011) The
Glacial History of The Dinaric Alps, Montenegro. Quaternary Science Reviews 30,
3393-3412.
Woodward, J.C., Hamlin, R.H.B., Macklin, M.G., Hughes, P.D. & Lewin, J.
(2008) Pleistocene catchment dynamics in the Mediterranean: glaciation, fluvial
geomorphology and the slackwater sediment record. Geomorphology 101, 44-67. |
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