Image of Evidence of Holocene Sea-Level Rise from Buried Oyster Reef Terrain in a Land-Locked Insular Embayment in Greece

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Evidence of Holocene Sea-Level Rise from Buried Oyster Reef Terrain in a Land-Locked Insular Embayment in Greece

Gera Gulf, a relatively small embayment on the island of Lesvos, serves as a representative example of a semi-enclosed, shallow marine system in Greece. Previous studies revealed that the gulf seafloor is occupied by numerous small reefs that are evenly distributed. Recently, seismic surveys together with gravity coring have shown numerous relict reefs within a fine-grained matrix, hosted at different stratigraphic levels above the inferred Holocene/Pleistocene boundary and locally extending up to the present seabed. The reefs are primarily engineered by the bivalve Ostrea edulis, with additional colonization by other marine organisms such as the coral Cladocora caespitosa. Key features identified in the seismic profiles include the widespread distribution of buried reef structures, erosional surfaces and unconformities also related to a paleolake, extensive fluid concentrations, and a major fault system paralleling the northeastern coast. Seismic record analysis and sediment dating suggest that the flooding of Gera Gulf began approximately 7500 BP, with O. edulis colonizing the seabed shortly thereafter. Buried reef structures were identified within the transgressive and highstand system tracts, characterized by varying sedimentation rates. These variations reflect changing environmental conditions, probably linked to specific climatic events during the Holocene epoch, which contributed to the evolution and shaping of the oyster reef terrain. Given the limited studies on recent or buried oyster reefs in similar environments, this study provides critical insights into the Holocene evolution of oyster reef terrains and their response to climate changes.

Availability
420550Perpustakaan BIG (Eksternal Harddisk)Available
Detail Information
Series Title
Geosciences
Call Number
550
Publisher
Switzerland : MPDI.,
Collation
20 hlm PDF, 3.783 KB
Language
Inggris
ISBN/ISSN
2076-3263
Classification
550
Content Type
text
Media Type
-
Carrier Type
online resource
Edition
Vol.15, Issue 3, March 2025
Subject(s)
oyster reefs
Ostrea edulis
seismic survey
14C dating
Holocene
Gera Gulf
Aegean Sea
Specific Detail Info
Geosciences
Statement of Responsibility
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