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Evidence of climatic variations in Upper Pleistocene and Holocene sediments from the Lagoon of Venice (Italy) and the Yellow Sea (China)
Author(s)
Language
English
Obiettivo Specifico
6A. Monitoraggio ambientale, sicurezza e territorio
Status
Published
JCR Journal
N/A or not JCR
Peer review journal
Yes
Title of the book
Issue/vol(year)
9/1 (1997)
ISSN
1042-8011
Publisher
World Resource Review
Pages (printed)
101-112
Issued date
1997
Alternative Location
Abstract
The effects of global climatic changes that occurred since the last Quaternary glaciation are recognizable in the stratigraphic sequences from several coastal zones in different locations around the world. The paleoevolution of the Northern Adriatic Sea and the Yellow Sea during the last 25,000 years has been characterized by several similar episodes of climatic changes. We report on the effects of climatic changes on the mineralogical composition and textural characteristics of clay and sand sedimentations in these paleoenvironments that are geographically far apart, correlating regional paleoclimatic changes with the mineralogical composition variations of sand and clay sequences. The mineralogical investigation has evidenced an increase of Quartz and Feldspar percentages and a decrease of Calcite and Dolomite during colder periods. Two depositional events, the hard clay layers and the cemented sand formations, that carry the imprints of the climatic conditions during their diagenesis are here reported and described. The hard clay layers represent the last continental sedimentation deposited during the Upper Pleistocene. The compactness of these clay layers is probably due to a long exposure to a cold and very dry climate. The water inside cemented sands studied were found under and outside of the Venice Lagoon and are similar to the beachrock formations presently found in tropical regions in intertidal zones. These cemented sands are remnants of ancient shorelines and witnesses of warm climate events.
References
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Bortolami, G.C., J.C.H. Fontes, V. Mearkgraf and J.F. Saliege, Land sea and climate in the northern Adriatic region during late Pleistocene and Holocene, Paleogeogr., Paleoclimato, Paleoecol, 21 , 139 (1977).
Congxiang, L., Sedimentary processes in the Chagjiang (Yangtze) Delta Since Late Pleistocene, Col lee/cd Oceanic Works, 7, 2, 116 (1984).
Congxiang, L., M. Qiubao and S. Heping, Holocene stratigraphy and transgression in the South Flank of Changjiang Delta, Kexue Tongbao, 32, 17, 1193 (1987).
Fairbridge, R.W., Quaternary shoreline problems at lnqua, 1969, Quaternaria, XV, I, Roma. (1971).
Gatto, P. and L. Carbognin, The Lagoon of Venice: natural environmental trend and man induced modification, Hydr. Sci. Bull. 26(4), 370 (1981).
Gatto, P. and P. Previatello, Significato stratigrafico, comportamento meccanico e distribuzione nella laguna di Venezia di un argilla sovraconsolidata nota come "caranto", Isitituto per lo Studio della Dinamica delle Grandi Masse, CNR., Techn. Rep. 70, Venezia (1974).
Marabini, F. and A. Veggiani Evolutional trend of the coastal zone and influence of the climatic fluctuations, Proc 2nd International Symp. on Coastal Ocean Space Utilization, Long Beach, CA (USA) (1991).
Ortolani, F. and S. Pagliuca, Variazioni c1imatiche e crisi dell'ambiente antropizzato, Il Quaternario 7(1) 351 (1994).
Tosi, L., L'evoluzione paleoambientale tardo quaternaria del litorale veneziano nelle attuali conoscenze, Il Quaternario, 7(2) 589 (1994a).
Tosi, L., I sedimenti tardo quaternari dell'area litorale veneziana: analisi delle caratteristiche fisico-meccaniche, Geologia Tecnica & Ambientale, 3, 47 (1994b).
Veggiani, A., I deterioramenti c1imatici dell'Eta' del Ferro e dell' Alto Medioevo, Bull. Soc. Torricelliana di Scienze e Lettere, 45 Faenza (1994).
Wamg, P., The Ice-Age China Sea - Research Results and Problems, Proc. of the First International Conference on Asina Marine Geology, Shanghai, Sept. 7-10 (1988).
Yang, Z. and H. Lin, Quaternary process in Eastern China and their international correlation, Geological Publishing House, Beijing, China (1991).
Zang, L. and X. Fang, The Farming-Grazing Transitional Zone of Northern China, China Global Chaenge Report, 2, 107, Science Press, Beijing, China (1995).
Bonardi, M. and L. Tosi, Climatic and sea level fluctuations evidenced in the mineralogical composition of the Late Quaternary sediments from the Venetian littoral (Italy), Proc. 14th International Sedimentological Congress, E5, Recife, Brazil.
Bortolami, G.C., J.C.H. Fontes, V. Mearkgraf and J.F. Saliege, Land sea and climate in the northern Adriatic region during late Pleistocene and Holocene, Paleogeogr., Paleoclimato, Paleoecol, 21 , 139 (1977).
Congxiang, L., Sedimentary processes in the Chagjiang (Yangtze) Delta Since Late Pleistocene, Col lee/cd Oceanic Works, 7, 2, 116 (1984).
Congxiang, L., M. Qiubao and S. Heping, Holocene stratigraphy and transgression in the South Flank of Changjiang Delta, Kexue Tongbao, 32, 17, 1193 (1987).
Fairbridge, R.W., Quaternary shoreline problems at lnqua, 1969, Quaternaria, XV, I, Roma. (1971).
Gatto, P. and L. Carbognin, The Lagoon of Venice: natural environmental trend and man induced modification, Hydr. Sci. Bull. 26(4), 370 (1981).
Gatto, P. and P. Previatello, Significato stratigrafico, comportamento meccanico e distribuzione nella laguna di Venezia di un argilla sovraconsolidata nota come "caranto", Isitituto per lo Studio della Dinamica delle Grandi Masse, CNR., Techn. Rep. 70, Venezia (1974).
Marabini, F. and A. Veggiani Evolutional trend of the coastal zone and influence of the climatic fluctuations, Proc 2nd International Symp. on Coastal Ocean Space Utilization, Long Beach, CA (USA) (1991).
Ortolani, F. and S. Pagliuca, Variazioni c1imatiche e crisi dell'ambiente antropizzato, Il Quaternario 7(1) 351 (1994).
Tosi, L., L'evoluzione paleoambientale tardo quaternaria del litorale veneziano nelle attuali conoscenze, Il Quaternario, 7(2) 589 (1994a).
Tosi, L., I sedimenti tardo quaternari dell'area litorale veneziana: analisi delle caratteristiche fisico-meccaniche, Geologia Tecnica & Ambientale, 3, 47 (1994b).
Veggiani, A., I deterioramenti c1imatici dell'Eta' del Ferro e dell' Alto Medioevo, Bull. Soc. Torricelliana di Scienze e Lettere, 45 Faenza (1994).
Wamg, P., The Ice-Age China Sea - Research Results and Problems, Proc. of the First International Conference on Asina Marine Geology, Shanghai, Sept. 7-10 (1988).
Yang, Z. and H. Lin, Quaternary process in Eastern China and their international correlation, Geological Publishing House, Beijing, China (1991).
Zang, L. and X. Fang, The Farming-Grazing Transitional Zone of Northern China, China Global Chaenge Report, 2, 107, Science Press, Beijing, China (1995).
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