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Coastal paleo-environment and sea-level change at Macassa Bay, southern Mozambique, since c 6600 cal BP

Norstrom, Elin; Risberg, Jan; Grondahl, Helene; Holmgren, Karin; Snowball, Ian LU ; Mugabe, Joao Alberto and Sitoe, Sandra Raul (2012) In Quaternary International 260. p.153-163
Abstract
Changes in Holocene coastal paleo-environment and sea-level variations have been recorded in estuary sediments from Macassa Bay, southern Mozambique. Methods include analysis of fossil diatoms, sediment stratigraphy, mineral magnetic properties, stable carbon and nitrogen isotope composition and carbon and nitrogen content. The chronology, based on six AMS C-14 dates, suggests a basal age of the sediment core of c 6600 cal BP (calibrated years Before Present). The multi-proxy dataset implies two phases when the site was experiencing marine conditions and tentative sea-level high-stands: 1) between c 6600-6300 cal BP which is contemporary with the last phase of the global transgression and the Holocene climatic optimum, and 2) between c... (More)
Changes in Holocene coastal paleo-environment and sea-level variations have been recorded in estuary sediments from Macassa Bay, southern Mozambique. Methods include analysis of fossil diatoms, sediment stratigraphy, mineral magnetic properties, stable carbon and nitrogen isotope composition and carbon and nitrogen content. The chronology, based on six AMS C-14 dates, suggests a basal age of the sediment core of c 6600 cal BP (calibrated years Before Present). The multi-proxy dataset implies two phases when the site was experiencing marine conditions and tentative sea-level high-stands: 1) between c 6600-6300 cal BP which is contemporary with the last phase of the global transgression and the Holocene climatic optimum, and 2) between c 4700-1000 cal BP, a period when sea level curves from the region suggest occasional minor sea level high-stands. Between these phases (c 6300-4700 cal BP), the environment within the Macassa Bay estuary was less influenced by marine processes, and studied proxies indicate a freshwater phase associated with relatively low sea levels. After c 1000 cal BP, a terrestrial environment prevailed at the site, probably as a result of a combined effect of sea level lowering and high accumulation of organic peat within the estuary. (C) 2011 Elsevier Ltd and INQUA. All rights reserved. (Less)
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author
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type
Contribution to journal
publication status
published
subject
in
Quaternary International
volume
260
pages
153 - 163
publisher
Elsevier
external identifiers
  • wos:000304722900014
  • scopus:84860238024
ISSN
1873-4553
DOI
10.1016/j.quaint.2011.11.032
language
English
LU publication?
yes
id
baf4ad75-63ea-405c-935b-d0dfd21f9821 (old id 2903207)
date added to LUP
2012-07-24 10:04:50
date last changed
2017-10-29 03:04:23
@article{baf4ad75-63ea-405c-935b-d0dfd21f9821,
  abstract     = {Changes in Holocene coastal paleo-environment and sea-level variations have been recorded in estuary sediments from Macassa Bay, southern Mozambique. Methods include analysis of fossil diatoms, sediment stratigraphy, mineral magnetic properties, stable carbon and nitrogen isotope composition and carbon and nitrogen content. The chronology, based on six AMS C-14 dates, suggests a basal age of the sediment core of c 6600 cal BP (calibrated years Before Present). The multi-proxy dataset implies two phases when the site was experiencing marine conditions and tentative sea-level high-stands: 1) between c 6600-6300 cal BP which is contemporary with the last phase of the global transgression and the Holocene climatic optimum, and 2) between c 4700-1000 cal BP, a period when sea level curves from the region suggest occasional minor sea level high-stands. Between these phases (c 6300-4700 cal BP), the environment within the Macassa Bay estuary was less influenced by marine processes, and studied proxies indicate a freshwater phase associated with relatively low sea levels. After c 1000 cal BP, a terrestrial environment prevailed at the site, probably as a result of a combined effect of sea level lowering and high accumulation of organic peat within the estuary. (C) 2011 Elsevier Ltd and INQUA. All rights reserved.},
  author       = {Norstrom, Elin and Risberg, Jan and Grondahl, Helene and Holmgren, Karin and Snowball, Ian and Mugabe, Joao Alberto and Sitoe, Sandra Raul},
  issn         = {1873-4553},
  language     = {eng},
  pages        = {153--163},
  publisher    = {Elsevier},
  series       = {Quaternary International},
  title        = {Coastal paleo-environment and sea-level change at Macassa Bay, southern Mozambique, since c 6600 cal BP},
  url          = {http://dx.doi.org/10.1016/j.quaint.2011.11.032},
  volume       = {260},
  year         = {2012},
}