HOLOCENE AGGRADATION/EROSION OF A TUFA DAM AT TRIPONZO (CENTRAL ITALY)
| Autor: | Fubelli, G, Dramis, F, Calderoni, G, Cilla, G, Materazzi, Marco, Mazzini, I, Soligo, M. |
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| Přispěvatelé: | Fubelli, G, Dramis, F, Calderoni, G, Cilla, G, Materazzi, M, Mazzini, I, Soligo, Michele |
| Rok vydání: | 2013 |
| Předmět: | |
| Zdroj: | Geografia fisica e dinamica quaternaria (Testo stamp.) 36 (2013): 259–266. doi:10.4461/GFDQ.2013.36.21 info:cnr-pdr/source/autori:Fubelli, Giandomenico; Dramis, Francesco; Calderoni, Gilberto; Cilla, Giuseppe; Materazzi, Marco; Mazzini, Ilaria; Soligo, Michele/titolo:HOLOCENE AGGRADATION%2FEROSION OF A TUFA DAM AT TRIPONZO (CENTRAL ITALY)/doi:10.4461%2FGFDQ.2013.36.21/rivista:Geografia fisica e dinamica quaternaria (Testo stamp.)/anno:2013/pagina_da:259/pagina_a:266/intervallo_pagine:259–266/volume:36 |
| DOI: | 10.4461/GFDQ.2013.36.21 |
| Popis: | The C-14 dating of organic-rich layers from the backfill sequences of the Triponzo village tufa dam (Tiber River basin) allows us to outline the Holocene aggradation/erosion stages of fluvial tufa in Central Italy. Here, the deposition of tufa first occurred prior to 8240 +/- 75 C-14 yr BP (7480-7070 cal bC) and continued, even if with different rates, giving rise to a lacustrine/swampy basin upstream. Since 3760 +/- 60 C-14 yr BP (2350-2010 cal bC) a sequence of alternating periods of dam erosion and aggradation occurred. After 2825 +/- 60 C-14 yr BP (1160-830 cal bC) fluvial incision eventually cut the dam down to the present valley bottom, being only interrupted by a short-lived phase of dam aggradation which caused the formation of a strath terraces covered with gravels and tufa sands. A comparable evolution pattern is shown by other tufa dams in Central Italy. This paper deals with the control factors of tufa deposition/erosion during the Holocene with a particular reference to the role of climate changes. |
| Databáze: | OpenAIRE |
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