DOI: 10.1016/j.gloplacha.2013.05.002
论文题名: Chronostratigraphic and lithologic features of the Tiber River sediments (Rome, Italy): Implications on the post-glacial sea-level rise and Holocene climate
作者: Marra F. ; Bozzano F. ; Cinti F.R.
刊名: Global and Planetary Change
ISSN: 0921-8264
出版年: 2013
卷: 107 起始页码: 157
结束页码: 176
语种: 英语
英文关键词: Fluvio-deltaic sedimentation
; Holocene climate
; Post-glacial sea-level rise
; Tiber River
Scopus关键词: Fluvio-deltaic
; Glacial Isostatic Adjustments
; Holocene climate
; Late Pleistocene-Holocene
; Lithostratigraphic units
; Sea level rise
; Sea-level oscillations
; Sediment transport capacity
; Deposits
; Glacial geology
; Sea level
; Sediment transport
; Sedimentation
; Sedimentology
; Stratigraphy
; Rivers
; aggradation
; borehole
; chronostratigraphy
; climate variation
; compaction
; erosion
; fill
; fluvial deposit
; glacioisostasy
; grain size
; Holocene
; lithology
; lithostratigraphy
; paleoclimate
; Pleistocene
; Postglacial
; river channel
; sea level change
; sediment transport
; subsidence
; uplift
; Italy
; Lazio
; Roma [Lazio]
; Rome
; Tiber Basin
英文摘要: Rapid and permanent granulometric changes within the clastic sedimentary deposits of the Tiber River are directly linked to changes in sediment transport capacity and give insight on climate fluctuations and related sea-level oscillations during Late Pleistocene-Holocene times. In this work, we investigate the stratigraphic features of the sedimentary fill of the Tiber River channel as far as 30km from the coast, and of one tributary, the Grottaperfetta stream. Through direct observation and core sampling of ten, 30 to 80m deep boreholes, and the analysis of a large number of stratigraphic log data, we reconstruct a series of transverse sections and correlate them along a longitudinal profile of the Tiber River course. We provide geochronologic constraints to the deposition of distinct lithostratigraphic units by means of 8 newly acquired 14C ages and 21 previously reported ages of intercalated peat layers and wood fragments. Moreover, we review and select 28 radiocarbon ages from literature on the deposits of the Tiber River in the coastal plain, in order to reconstruct the aggradational history throughout the distal portion of the basin. Finally, we provide curves of sediment aggradation vs. time during the last 19,000yr for the different investigated portions of the Tiber River course. We compare them to sea-level curves from the literature. To perform this comparison, we use a rigorous geotechnical approach to estimate the subsidence due to sediment compaction, and we apply a correction to the Present-day elevation of the dated samples of organic material interbedded with the sedimentary deposits.Two significant sedimentary events at around 13,800. yr. BP and 7500. yr. BP, marked by sharp stratigraphic and granulometric changes, are recognized and correlate to important variations in the rate of sea-level rise. Moreover, we show evidence of an erosional event coupled to a reversal of the granulometry (increase in gain size of sediments) affecting the whole investigated tract of the Tiber River channel between 5500 and 3500. yr. BP and discuss its possible causes. In particular, we discuss whether besides the change in capacity of transport due to a climatic change, also a drop in sea level, in the order of 2-3 meters, may have occurred in this time span, either in response to an increase in global ice volume, glacial isostatic adjustment, or local tectonic uplift. © 2013 Elsevier B.V. URL: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84879289215&doi=10.1016%2fj.gloplacha.2013.05.002&partnerID=40&md5=a030b3d358714cd0f0de9e5b0311daf7
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/11170
Appears in Collections: 全球变化的国际研究计划
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作者单位: Istituto Nazionale di Geofisica e Vulcanologia, Via di Vigna Murata 605, 00143 Rome, Italy
Recommended Citation:
Marra F.,Bozzano F.,Cinti F.R.. Chronostratigraphic and lithologic features of the Tiber River sediments (Rome, Italy): Implications on the post-glacial sea-level rise and Holocene climate[J]. Global and Planetary Change,2013-01-01,107.