Complexity of Quaternary aeolian dynamics (Canary Islands)

Publikation: Beitrag in FachzeitschriftForschungsartikelBeigetragenBegutachtung

Beitragende

Abstract

Carbonate aeolianites are important Quaternary archives at the point of intersection between marine and terrestrial systems. Since they are composed of alternating aeolian sediments and several paleosol units, these sequences are highly suitable to reconstruct palaeoenvironmental conditions. In northern Fuerteventura, at least five different areas are characterised by successions of different dune generations and paleosols. Few studies have addressed the stratigraphic order of individual dune areas. Therefore, a comprehensive consideration spanning several dune fields is needed. Here,we aimto present a detailed stratigraphy of two different dune areas and to identify the contribution of different materials (shelf origin, dust origin, volcanic origin) along with processes (accumulation, soil formation, erosion/preservation) that build up these archives. Four key sectionswere selected and sampled for laboratory analyses (texture, elemental composition, CaCO3 content, palaeoenvironmental
magnetics, luminescence dating, and gastropod assemblages). Based on main stratigraphic features, five major sedimentary sequenceswere identified indicating differences in prevailing sediment supply, humidity, and volcanic
activity. First luminescence dating (IRSL) of the sequences revealed sedimentation ages between 360 ka and 15 ka. Finally, we are able to demonstrate that different dune areas show comparable stratigraphic patterns,
but each studied site is defined by certain characteristics depending on the respective features of the closer surrounding. The knowledge of these peculiarities and the underlying background is essential in order to correlate
different sites and to attempt an appropriate environmental interpretation of the sedimentary sequences.

Details

OriginalspracheEnglisch
Seiten (von - bis)146-162
Seitenumfang17
FachzeitschriftPalaeogeography, Palaeoclimatology, Palaeoecology
Jahrgang472
PublikationsstatusVeröffentlicht - Apr. 2017
Peer-Review-StatusJa

Externe IDs

Scopus 85013243600
ORCID /0000-0003-2365-2899/work/167217109
ORCID /0000-0002-0772-2984/work/167708088

Schlagworte

Ziele für nachhaltige Entwicklung

Schlagwörter

  • Fuerteventura, Paleosol sequence, Dune, Luminescence dating, Stratigraphy, Land snail