Sedimentological characteristics of ice-wedge polygon terrain in adventdalen (Svalbard) environmental and climatic implications for the late Holocene

M. Oliva, G. Vieira, P. Pina, P. Pereira, M. Neves, M. C. Freitas

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

Ice wedges are widespread periglacial features in the landscape of Adventdalen, Svalbard. The networks of ice wedges have created areas with well-developed polygonal terrains in the lowest fluvial terraces in this valley. We have examined the sedimentological characteristics of the northern and southern banks of the Advent river for palaeoenvironmental purposes. The base of two sedimentary sections reported radiocarbon dates of 3.3 and 3.9 ka BP, respectively. The northern site is constituted by three very different lithostratigraphical units, which suggests that their formation should be related to different environmental and climate conditions. By contrast, the southern section shows a rather homogeneous composition, with no significant variations in grain size and organic matter content. In both cases the uppermost sediments are constituted by a thick aeolian deposit. According to our data, warmer climate conditions may have prevailed during the mid Holocene until 3.3 ka BP with widespread peat formation in the valley bottom. Subsequently, a period with alternating soil formation and aeolian sedimentation took place from 3 to 2.5 ka BP, probably due to increasing climatic severity. During the last millennium a long-term cooling trend has favoured aeolian deposition in the lowest part of Adventdalen.

Original languageEnglish
Pages (from-to)901-914
Number of pages14
JournalSolid Earth
Volume5
Issue number2
DOIs
Publication statusPublished - Sep 1 2014

Fingerprint

polygons
Ice
polygon
climate conditions
wedges
ice
valleys
eolian deposits
periglacial feature
Holocene
climate
valley
Banks (bodies of water)
Peat
eolian deposit
terraces
soil formation
Sedimentation
Biological materials
peat

ASJC Scopus subject areas

  • Soil Science
  • Earth-Surface Processes
  • Geochemistry and Petrology
  • Geology
  • Geophysics
  • Palaeontology
  • Stratigraphy

Cite this

Sedimentological characteristics of ice-wedge polygon terrain in adventdalen (Svalbard) environmental and climatic implications for the late Holocene. / Oliva, M.; Vieira, G.; Pina, P.; Pereira, P.; Neves, M.; Freitas, M. C.

In: Solid Earth, Vol. 5, No. 2, 01.09.2014, p. 901-914.

Research output: Contribution to journalArticle

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