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Palaeoenvironmental and climatic inferences from the late early Pleistocene lacustrine deposits in the eastern Tiberino Basin (central Italy)

Published online by Cambridge University Press:  07 June 2018

Roberto Bizzarri
Affiliation:
Dipartimento di Fisica e Geologia, Università degli Studi di Perugia, Via A. Pascoli snc, 06123 Perugia, Italy
Paolo Corrado
Affiliation:
Dipartimento di Biologia Ambientale, Sapienza Università di Roma, P.le A. Moro 5, 00185 Roma, Italy
Donatella Magri
Affiliation:
Dipartimento di Biologia Ambientale, Sapienza Università di Roma, P.le A. Moro 5, 00185 Roma, Italy
Edoardo Martinetto
Affiliation:
Dipartimento di Scienze della Terra, Università degli Studi di Torino, Via Valperga Caluso 35, Torino, Italy
Daniela Esu
Affiliation:
Dipartimento di Scienze della Terra, Sapienza Università di Roma, P.le A. Moro 5, 00185 Roma, Italy
Valentina Caprai
Affiliation:
Via XXV Aprile, 14, 52044 Camucia di Cortona (AR), Italy
Roberto Colacicchi
Affiliation:
Via Sabotino 5, 06034 Foligno (PG), Italy
Giovanni Napoleone
Affiliation:
Dipartimento di Scienze della Terra, Università di Firenze, Via G. La Pira, Firenze, Italy
Andrea Albianelli
Affiliation:
Dipartimento di Scienze della Terra, Università di Firenze, Via G. La Pira, Firenze, Italy
Angela Baldanza*
Affiliation:
Dipartimento di Fisica e Geologia, Università degli Studi di Perugia, Via A. Pascoli snc, 06123 Perugia, Italy
*
*Corresponding author at: Dipartimento di Fisica e Geologia, Università degli Studi di Perugia, Via A. Pascoli snc, 06123 Perugia, Italy. E-mail address: [email protected] (A. Baldanza).

Abstract

Within the Neogene-Quaternary evolution of the Mediterranean intermountain basins, the eastern Tiberino Basin provides new multifaceted chronological, biostratigraphic, palaeoecological, and palaeoenvironmental information, appreciably improving the knowledge of palaeoenvironmental and climate conditions during the middle-late Matuyama Chron (late early Pleistocene). Shallow to relatively deep lacustrine deposits and alluvial plain deposits, magnetostratigraphically calibrated, hold malacofaunas, ostracofaunas, and carpological remains, as well as a pollen record. Palaeocarpological remains widely originated from the local (azonal) vegetation of waterlogged environments. Nonetheless, some taxa show transitional morphology between possibly extinct Pliocene-Pleistocene forms and living taxa. The pollen record highlights a conifer-dominated forest phase, indicating a temperate-wet interglacial period, well aligned inside the schemes for the same latitudinal band. The abundance of tree taxa currently absent from the Italian peninsula points to pre-Jaramillo late early Pleistocene biostratigraphical characters, here compared to other sections from central Italy, and contributes to a better definition of modes and timing of their disappearance in southern Europe. Malacofaunas and ostracods, still with late early Pleistocene features, together with Charophyte, mark repeated fluctuations in energy, temperature, and chemical composition of water. The overall record identifies an incipient diachronous cooling trend, for the first time recognized in southern Europe.

Type
Research Article
Copyright
Copyright © University of Washington. Published by Cambridge University Press, 2018 

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