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A review of MIS 7 and MIS 5 terrace deposits along the Gulf of Taranto based on new stratigraphic and chronological data

Vincenzo De Santis, Massimo Caldara, Trinidad Torres, Jose E. Ortiz and Yolanda Sanchez Palencia
A review of MIS 7 and MIS 5 terrace deposits along the Gulf of Taranto based on new stratigraphic and chronological data
Italian Journal of Geosciences (October 2018) 137 (3): 349-368

Abstract

We performed detailed geological and geomorphological analyses on a well-exposed series of marine terrace deposits located along a coastal area from the city of Taranto to the Bradano River in the northern Gulf of Taranto (southern Italy). Absolute dating was performed by applying amino acid racemisation (AAR) to ostracod shells and isoleucine epimerisation (D-aIle/L-Ile) to Glycymeris sp. shells. The combination of field geological surveys, remote sensing, digital terrain model analysis, and absolute dating allowed us to study a large number of stratigraphic sections as well as recognise and map three terrace deposits in the Apulian sector of the Gulf of Taranto that date to MIS 7.3, MIS 7.1 and MIS 5. A peculiar feature of the MIS 7.1 terrace deposit is the presence of biohermal and biostromal limestones rich in Cladocora caespitosa, calcareous algae and bryozoans; this feature contrasts with general context of the prevailing siliciclastic deposits. Based on currently available data, we propose two hypotheses regarding the MIS 5 terrace deposit: 1) the MIS 5 terrace formed entirely during MIS 5.5; and 2) the MIS 5 terrace is a set of terraces that correlates to MIS 5.5, 5.3 and 5.1, in which the scarps and abrasion platforms have been partially masked by the superimposition of the so-called givoni, ridges that are elongated sub-parallel to the coastline. Our data, combined with an extensive critical review of age dates in the literature, allow us to exclude the presence of an emerged marine terrace deposit of MIS 3. We calculate the uplift rates of the MIS 7.3, 7.1, 5.5 and 5.3 palaeoshorelines. In the west sector, the mean uplift rates calculated for the recognised inner edges are MIS 7.3 = 0.65 mm/a, MIS 5.5 = 0.39 mm/a, MIS 5.3 = 0.31 mm/a; in the central sector the rates are MIS 7.3 = 0.485 mm/a, MIS 7.1 = 0.37 mm/a, MIS 5.5 = 0.35 mm/a, MIS 5.3 = 0.26 mm/a; in the east sector the rates are MIS 7.3 = 0.39 mm/a, MIS 5.5 = 0.25 mm/a, MIS 5.3 = 0.21 mm/a. These uplift rates show a uniform decreasing trend in time and space, proceeding from the western to the eastern sector, which allows us to hypothesise a slowing of the uplift phase characterising the foredeep, which began in the middle Pleistocene.


ISSN: 2038-1719
EISSN: 2038-1727
Coden: BOGIAT
Serial Title: Italian Journal of Geosciences
Serial Volume: 137
Serial Issue: 3
Title: A review of MIS 7 and MIS 5 terrace deposits along the Gulf of Taranto based on new stratigraphic and chronological data
Affiliation: Universita degli Studi di Bari Aldo Moro, Dipartimento di Scienze della Terra e Geoambientali, Bari, Italy
Pages: 349-368
Published: 201810
Text Language: English
Publisher: Societa Geologica Italiana, Rome, Italy
References: 84
Accession Number: 2019-004689
Categories: Quaternary geologyGeochronology
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 3 tables, geol. sketch maps
N40°25'00" - N40°30'00", E17°10'00" - E17°15'00"
Secondary Affiliation: Madrid School of Mines, ESP, Spain
Country of Publication: Italy
Secondary Affiliation: GeoRef, Copyright 2019, American Geosciences Institute. Abstract, Copyright, Societa Geologica Italiana. Reference includes data from GeoScienceWorld, Alexandria, VA, United States
Update Code: 2019
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