Sedimentologische Untersuchungen im Golf von Manfredonia (Südadria)

Oeltzschner, Hansjörg; Sigl, W.

doi:10.1007/bf01820935

Cited by 5 publications

(3 citation statements)

References 4 publications

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“…The situation described by Oeltscnher and Sigl () and Sigl () is compatible with that of our seismic profiles, where the coralligenous seems to have formed directly on the S 1 surface and are subsequently partially buried by the younger g 2 Unit (Fig. ).…”

Section: Discussionsupporting

confidence: 92%

“…The seismofacies of the c Unit suggests that it comprises lithoid bodies, composed of biogenic concretions (coralligenous) produced by local cementation of algae, bryozoans, serpulids and/or calcareous molluscs on coarse loose sediments or hardened sediments. The presence of these concretions in the Manfredonia Gulf was documented by Oeltscnher and Sigl () and Sigl (). The authors report an echosounding profile (e.g.…”

Section: Discussionmentioning

confidence: 65%

“…The authors report an echosounding profile (e.g. see Oeltscnher and Sigl, , Fig. ) in which a reef‐like organic structure, up to several metres high, has grown on an older buried irregular surface.…”

Section: Discussionmentioning

confidence: 99%

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Evolution of an incised valley system in the southern Adriatic Sea (Apulian margin): an onshore–offshore correlation

Santis

Caldara

2014

Geological Journal

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Seismic surveys with sub‐bottom profiler were carried out in the Manfredonia Gulf in the southern Adriatic Sea. Here, a buried surface was recognized on which three valleys, located about 80 km from the shelf edge, were deeply incised. Beneath this surface, a pre‐upper Würm seismic unit (PW) was identified. Above, two seismic units were recognized: the transgressive system tract (TST) and highstand system tract (g2). On the basis of regional correlation with onshore and offshore data, these units and their boundaries were dated and correlated with phases of the last glacial–interglacial cycle. The incised valley system was attributed to the Marine Isotopic Stage (MIS) 2. The TST and g2 units fill the valleys and were attributed to the post‐glacial sea‐level rise and highstand. The incised valleys are anomalous with respect to published models; despite having many characteristics that would have limited the fluvial incision (the lowstand shoreline that remained on the shelf, the low gradient of the shelf, the subsidence that affected the study area since MIS 5), the valleys appear to be deeply incised on the shelf, with valley flanks that can exceed 40 m in height. The model to explain the formation of the valleys comprises enhanced river discharge as the key factor in increasing river energy and promoting erosion across the low gradient shelf. Copyright © 2014 John Wiley & Sons, Ltd.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 65%

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Evolution of an incised valley system in the southern Adriatic Sea (Apulian margin): an onshore–offshore correlation

Santis

Caldara

2014

Geological Journal

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Holocene and late-Pleistocene sedimentation in the Adriatic Sea

Straaten¹

1970

Geol Rundsch

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Eine kurze Ubersicht wird gegeben fiber die sedimentologische Kenntnis der Adria (mit Ausnabme der jugoslawischen und albanischen Kfistengew~isser).Geophysikalische Untersuchungen zeigen, dab die Kalkstein-Obertt~iche unter den tonig-sandigen Ablagerungen des Plioz[ins und des Quart~irs, ein starkes Relief besitzt. Sie hat ihre grSBten Tiefen (4---8 km) a) zwischen Ravenna und Rimini; b) zwischen San Benedetto und Pescara und c) im Untergrund des Albanischen Schelfes.Rezente Sande sind in der Hauptsache auf eine schmale Kiistenzone beschrankt. Dagegen haben pleistoz~ine Residual-Sande, ursprfinglich yon Flfissen herbeigebracht, eine grol3e Ausdehnung auf dem Schelf. Zwischen diesen beiden sandigen Zonen findet man einen ,,pro-littoralen" Schlicksaum, wo die Hauptmasse des rezent ins Meer gebradaten terrigenen Schlickes abgelagert wird. Die maximale Akkumulationsgeschwindigkeit in dieser Zone betr~igt wahrscheinlich ungef~ihr 41/2 mm pro Jahr.Der Anteil des terrigenen Schlickes, der nicht in diesem prolittoralen Schlicksaum zur Ablagerung kommt, besteht aus Flocken yon so kleinen Abmessungen, dab sie w~ihrend ihres Transportes fiber den [iuBeren Schelf-Regionen suspendiert bleiben. Sic sedimentieren gr613tenteils in den Becken der Zentral-Adria (mittlere Ablagerungsrate w~ihrend des Holoz~ins maximal etwa 1/2 mm pro Jahr) und im bathyalen Becken der Sfidost-Adria.Der tiefste Teil dieses sfidSstlichen Beckens wird von einer fast horizontalen Ebene (auf etwa 1218 m Tiefe) eingenommen. Der l[ingste Kern, der in dieser Ebene entnommen wurde (640 em, wovon 240 cm Holoz~in), hat ungef~ihr die folgende Zusammensetzung: 61Yo Turbidit-Material, 5Yo vulkanische Asche (Sandund grobe Schluff-Fraktionen), 0,2~o organische Kalkreste (gr6ber als Schlnff) und 84~o normaler terrigener Schlick. Die Asdaenf~ille waren auf die mitfleren und sfidSstlichen Teile der Adria beschr[inkt. AbstractThe following paper is a sumlnary of sediment ological data on the Adriatic Sea (with the exception of the areas along the Jugoslavian and Albanian coasts). Because it is difficult to summarize a summary, only a few of the main conclusions will be mentioned here.Geophysical investigations indicate that the top of the limestone series, underlying the clayey and sandy deposits of the Pliocene and the Quaternary in the Adriatic area has a very uneven topography. Its greatest depths (4---6 kin) are found a) between Ravenna and Rimini, b) between San Benedetto and Yescara, and c) below the Albanian shelf. The remaining part of the recent mud is transported in the sea water as floccules of such small size that they remain suspended over the deeper zones of the shelf. Most of it is deposited in the basins of the Central Adriatic (maximum accumulation rate for the Holocene on the average circa 1/.2 mm per year) and in the bathyal basin in the southeast. The deepest area of the latter basin is formed by an almost Lorizontal plain (circa 1218 m deep). The longest core from this plain (240 cm of Holocene and 400 cm of late Pleistocene) is composed for roughl...

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