Quaternary Transgressive/Regressive Cycles in the Gulf of Argos, Greece

Andel, Tjeerd H. van; Zangger, Eberhard; Perissoratis, C.

doi:10.1016/0033-5894(90)90044-l

Cited by 27 publications

(16 citation statements)

References 20 publications

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“…Each of the ES surfaces originated at times of maximum lowstand and most extensive subaerial exposure of the shelf. The preservation of the offlap-break terminations of the units immediately below some of these surfaces may have resulted from cementation during subaerial exposure that prevented their erosion; a similar process was suggested to explain the formation of 'hardpans' at the top of similar regressive Quaternary deposits in Greece (van Andel et al 1990;McMurray & Gawthorpe this volume). In the case of the Adriatic, however, the youngest and more erosional of these surfaces (ES 1), records a phase of submarine erosion and reworking.…”

Section: Expression Of Bounding Surfacesmentioning

confidence: 94%

Quaternary forced regression deposits in the Adriatic basin and the record of composite sea-level cycles

Trincardi

Correggiari

2000

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High-resolution seismic and sedimentological data from the Central Adriatic basin reveals a Quaternary shelf-perched wedge that is comprised of four prograding units, the top surfaces of which are truncated by regional erosional surfaces. Internal reflector geometry indicates that each unit developed during highstand to falling sea-level conditions. Falling sea level resulted in successive downward and seaward shifts of the shoreline (forced regression). Because progradation occurs as a depositional continuum from highstand to lowstand conditions, sequence boundaries are difficult to recognize and correlate on a regional scale. In fact, continued sea-level fall produces several downshift surfaces of limited lateral extent. The regional erosional surfaces that truncate and hence bound the prograding units are composite in origin. The erosion surfaces formed during times of shelf subaerial exposure and were modified by shoreface and marine erosion during each subsequent rapid sea-level rise. All of these composite erosional surfaces become conformable seaward of the youngest depositional shoreline break formed at the end of each phase of progradation. These composite sequence-bounding erosional surfaces are draped by mud that is the distal equivalent of the overlying progradational unit deposited following rapid landward shifts of the shoreline.Facies analysis and stratigraphic data in the youngest progradational unit indicate that each of the four progradational units formed in response to fourth-order (100-120 ka) cyclicity. The four progradational units stack to form an aggradational-retrogradational sequence set that records a longer-term relative sea-level rise. Such a trend can reflect regional subsidence and/or a longer-term component of rise in the Quaternary eustatic signal. In the Adriatic basin, the key factors that favour the preservation of the forced regression deposits within the Quaternary shelf-perched wedge are: (1) the composite nature of relative sea-level cycles where a longer-term relative sea-level rise interacts with shorter-term (fourth to fifth-order) sea-level cycles; (2) the asymmetry of the eustatic signal that, reinforced by local subsidence, yields relative rises of large magnitude and short duration; (3) the high amplitude of the higher-frequency fifth-order signal that drives relative sea-level falls of short duration. This kind of composite cyclicity also controlled the formarion and preservation of forced regression deposits on other Quaternary continental margins as well as in ancient sedimentary successions where these deposits may occur in backstepping or aggradational multistorey sequence sets. Gawthorpe et al. 1994), whereas in contrast high-rates of relative sea-level rise seem necessary to explain the preservation of these deposits during subsequent transgressions (Tesson et al.

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Section: Expression Of Bounding Surfacesmentioning

confidence: 94%

Quaternary forced regression deposits in the Adriatic basin and the record of composite sea-level cycles

Trincardi

Correggiari

2000

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“…The soil dates imply ages for their substrates ranging from 40 kyr to more than 60 kyr. The Argive Plain paleosol correlates with low sea levels of the middle and late Last Glacial between 50 kyr and 75 kyr (van Andel, Zangger, and Perissoratis 1990), placing its substrate early in the Last Glacial. The maturity of the Kokkinopilos paleosol suggests that it formed early in the range of dated soils, placing deposition of the youngest Kokkinopilos redbeds at somewhat more than 60 kyr.…”

Section: Age Of the Main Kokkinopilos Paleosolmentioning

confidence: 98%

A Handaxe from Kokkinopilos, Epirus, and its Implications for the Paleolithic of Greece

Runnels¹,

Andel²

1993

Journal of Field Archaeology

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A complete) well-preserved Micoquian-type handaxe was discovered in 1991 at I(okkinopilos) Greece) stratified 16 m below a paleosol of Last Glacial age containing abundant M iddle Paleolithic artifacts. The handaxe was embedded in ((redbedS) (very jine-grained) wellindurated red sediments) and is the same age as the redbeds. The lithology of the redbeds suggests slow sedimentation on the floor of a doline (sinkhole) with a variable but often high groundwater level. A minimum age well in excessof60) 000 years (60 kyr) for the handaxe . isfurnished by the degree of maturity of the Middle Paleolithic paleosol. Taking into account the thickness oj the overburden) correcting for compaction) and assuming a reasonable sedimentation rate) the estimated age of the handaxe is 250±50 kyr. We identify two periods ojPaleolithic activity at I(okkinopilos: late Lower Paleolithic at ca. 250 kyr separated by a hiatus from a Middle Paleolithic of ca. 100-30 kyr ago. 192 Handaxe from I(okkinopilos) Greece/Runnels and van Andel KEFALLINIA Amvrakian Gulf 50 km

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“…The AB is a south‐widening, fault‐bounded Late Neogene–Quaternary extensional sedimentary basin (van Andel, Zangger, and Perissoratis ; van Andel, Perissoratis, and Rondoyanni ; Georgiou and Galanakis ). The underlying bedrock consists of folded and tectonically fractured Triassic to Upper Paleogene karstic carbonates thrusted against folded postEocene continental flysch deposits during the Alpine orogeny.…”

Section: Geologic Setting and Site Descriptionmentioning

confidence: 99%

“…The bedrock is overlain by an Upper Pliocene package of marl and sandy marl conglomerates passing to interbedded Quaternary marsh to fluviotorrential–alluvial deposits both of coastal and terrestrial origin (Fig. ) (Tataris et al ; van Andel et al , ; Apostolidis and Koutsouveli ). The strati‐graphic thickness and geometry of the Pliocene–Quaternary sediments is yet poorly known; however, following Karastathis et al , they are prone to cause strong non‐linear soil amplification during earthquakes and potential liquefaction.…”

Section: Geologic Setting and Site Descriptionmentioning

confidence: 99%

“…(Patras‐Corinth Continental Rift = PCCR; Iria‐Epidaurus Sinistral Transform fault system = IEST; Active normal and strike‐slip fault = red and blue line, respectively; Probable active normal fault = green line; Volcano = brown cross). (b) Terrain map of the Argive Basin with faults from Tataris et al ), Hatzfeld et al (1989), van Andel et al , ) and Georgiou and Galanakis and seismicity from the UOA catalog. (Rivers: Inachos = IR, Erasinos = ER, Manessi = MR).…”

Section: Introductionmentioning

confidence: 99%

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Seismic velocity model and near‐surface geology at Mycenaean Tiryns, Argive Basin, Peloponnese, Greece

Hinojosa-Prieto

Hinzen

2014

Near Surface Geophysics

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A near‐surface seismic refraction tomography survey was completed in the surroundings of the Mycenaean citadel of Tiryns in the Argive Basin, Peloponnese, Greece. The survey encompassed 11 hectares at the Tiryns citadel, an archaeological site listed by the United Nations Educational, Scientific and Cultural Organization as world heritage with over 120 years of excavation history. Site characterization of the shallow subsurface was performed using two‐dimensional seismic refraction tomography of compressional (P) and horizontally polarized shear (SH) wave data along 12 and 9 profiles, respectively. The interpretation of the seismic refraction results is complemented by available archaeological stratigraphy, stratigraphic logs, and new structural data of the exposed bedrock. The tomograms show a transition from unconsolidated fine alluvium at the surface to consolidated clays and silts to hard limestone bedrock. The soil–bedrock boundary dips away from the citadel, influencing the geometry of overlying soils into wedges. Based on twodimensional tomograms of P‐and SH‐wave velocities, the Poisson ratio, shear modulus, Young’s modulus, and bulk modulus were estimated for a four‐layer geotechnical model, which will be used to study seismic site effects. The rock mass quality index of the bedrock at Tiryns is classified as fair to very poor.

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Quaternary Transgressive/Regressive Cycles in the Gulf of Argos, Greece

Cited by 27 publications

References 20 publications

Quaternary forced regression deposits in the Adriatic basin and the record of composite sea-level cycles

Quaternary forced regression deposits in the Adriatic basin and the record of composite sea-level cycles

A Handaxe from Kokkinopilos, Epirus, and its Implications for the Paleolithic of Greece

Seismic velocity model and near‐surface geology at Mycenaean Tiryns, Argive Basin, Peloponnese, Greece

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