Κατεύθυνση Γεωλογική Ωκεανογραφία
Library of the School of Science

2019-01-24

2019

Benetou Evaggelia

Πούλος Σ. Καθηγητής Γεωλογίας (ΕΚΠΑ)
Σακελλαρίου Δ. Διευθυντής Ερευνών (ΕΛΚΕΘΕ)
Ρουσάκης Γ. Κύριος Ερευνητής (ΕΛΚΕΘΕ)

Διερεύνηση της Παλαιογεωγραφικής Διαμόρφωσης του Στρυμονικού Κόλπου την τελευταία Παγετώδη περίοδο.

Greek

Palaeogeographic evolution of the bay of Strimonas during the last glacial period.

In this thesis significant geo-morphological structures of the shallow and deeper portion of the shelf in the surrounding area of Strymonikos bay are mapped, using data from a hydrographic survey taken in July 2015, which included high resolution multibeam bathymetric recording of total 1200 nm in length and seismic profile from 3.5 kHz (250 nm) and Airgun (67 nm) systems. Especially 23 tomografies 3.5 kHz and 6 tomographies from Airgun systems were analyzed. The interpretation of the seismic profiles included the identification of seismic sequences, seismic facies, fault mapping and sea level indication markers.
The rising results allowed the Palaeogeographic evolution of the bay of Strimonas during the last glacial period (21,500 BP). In particular there were identified a) the palaeoriverbed of the Strymonas-Nestos River b) the position of the palaeoshoreline c) the distribution of the Holocene sedimentation and d) the existence of a major fault (NE-SW) with a strong surface manifestation on the seabed, that is connected with two or three secondary faults, which show synsedimentary tectonism.
All of these findings clearly indicate sedimentation conditions that are closely related to newer tectonic movements that took place in the recent geological past. Specifically, Strymon's neotectonic basin undergoes changes in its surroundings from the Neogene, with significant reclassifications in the settlement of sediments from the upper Pleistocene due to the action of the Last Glagial period. Still in the area some faults of the past were mapped that seem to be active even today and are associated with some faults in the land.

Science

Strimonas bay

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0

No

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https://pergamos.lib.uoa.gr/uoa/dl/object/2844981