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| Titel |
Evidence for latest Pleistocene to Holocene uplift at the southern margin of
the Central Anatolian Plateau (CAP), southern Turkey |
| VerfasserIn |
Domenico Cosentino, Nazik Ogretmen, Paola Cipollari, Elsa Gliozzi, Giuditta Radeff, Cengiz Yıldırım, Oruc M. Baykara, Chuan-Chou Shen |
| Konferenz |
EGU General Assembly 2016
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| Medientyp |
Artikel
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| Sprache |
en
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 18 (2016) |
| Datensatznummer |
250128842
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| Publikation (Nr.) |
 EGU/EGU2016-8873.pdf |
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| Zusammenfassung |
| Along the Mediterranean coastal area of southern Anatolia, markers of ancient sea-level have
been reported west of Alanya and east of the Göksu delta. In both areas, bioconstructed
fossil rims, consisting mainly of calcareous algae, are situated 0.5 m above the live
counterpart. The fossil rim to the west of Alanya has been dated between 2690 to 1545
yrs BP, evidencing late Holocene rock uplift at the CAP southern margin. More
recently, based on beachrocks along the coastal area from Incekum to the south of
Adana, authors showed that the shoreline was raised around 0.5 m after 19 BC-200
AD.
Based on new field observations along the coast between Aydı ncı k and Ayaş (Mersin,
southern Turkey), together with AMS 14C dating and high-resolution U-Th chronology, a
more complex uplift history can be suggested. Along the coast of Yeşilovacı k, we observed
up to seven uplifted marine notches, from 0.5 m to 6.10 m above sea level. Some of them
show relationships with a travertine crust that yielded U-Th ages of 2727 ± 1559
years and 5236 ± 2255 years. In the same area, a calcareous algae fossil trottoir
related to a marine notch 5.40 m above sea level yielded an AMS 14C 2σ age of
32700 to 31645 years cal BP. Considering that the global ocean was 60 m below
the present sea level at 32 ka, the Yeşilovacı k coastal area has been uplifted at 2
mm/yr.
Moving to the east, in a small embayment at Eğribük, two distinct well cemented beach
deposits containing Murex brandaris, Cerithium vulgatum, and Columbella rustica have been
uplifted at 0.3 m and 0.7 m above the present sea level. Although it is difficult to reconstruct
the paleodepth of those beach deposits, AMS 14C 2σ ages of 5575 to 5445 years cal BP and
2130 to 1965 years cal BP show late Holocene uplift. In the Narlı kuyu area, up to seven
different uplifted markers of sea level were observed between 0.8 and 7.2 m above the present
sea level. In addition, near Ayaş new insights for late Holocene uplift are from the northern
harbour of the ancient Roman town Elaiussa-Sebaste, which now is 4 m above sea level.
More evidence for late Holocene uplift of the Elaiussa-Sebaste area come from
a Roman pool located in the small peninsula to the east of the northern harbour.
There, a fossil shell of Patella cf. aspera, collected 1 m above the highest living
Patella, yielded an AMS 14C 2σ age of 850 to 1164 years cal AD. Considering an age
of 1000 yrs AD and the level of the Mediterranean sea that was 0.2 m below the
present sea level, we can estimate a tectonic uplift rate of 1.2 mm/yr for the last 1000
years.
Although the CAP southern margin shows clear evidence of recent uplift, with uplift rates
between 2 mm/yr to 1.2 mm/yr, to reconstruct a well-constrained uplift curve for the
Holocene more AMS 14C and U-Th dates need to be collected. |
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