Palaeoenvironment of Eocene prodelta in Spitsbergen recorded by the trace fossil Phycosiphon incertum

Polar research

Matías Reolid¹  Jenö Nagy²  Francisco Javier Rodríguez-Tovar³ 

[1] Department of GeologyUniversity of Jaén, Campus Las Lagunillas sn, ES-23071 Jaén, Spain;Department of GeosciencesUniversity of Oslo, PB 1047 Blindern NO-0316 Oslo, Norway;Department of Stratigraphy and PalaeontologyUniversity of Granada, Campus Fuentenueva sn, ES-18071 Granada, SpainCorrespondence

关键词: Trace fossils;    Phycosiphon;    Eocene;    prodelta;    turbiditic sediments;    Spitsbergen.;   

DOI  :  10.3402/polar.v33.23786

学科分类：自然科学（综合）

来源: Co-Action Publishing

【 摘 要 】

Ichnological, sedimentological and geochemical analyses were conducted on the Eocene Frysjaodden Formation in order to interpret palaeoenvironment prodelta sediments in the Central Basin of Spitsbergen. Phycosiphon incertum is the exclusive ichnotaxon showing differences in size, distribution, abundance and density, and relation to laminated/bioturbated intervals. Large P. incertum mainly occur dispersed, isolated and randomly distributed throughout the weakly laminated/non-laminated intervals. Small P. incertum occur occasionally in patches of several burrows within laminated intervals or as densely packed burrows in thin horizons in laminated intervals or constituting fully bioturbated intervals that are several centimetres thick. Ichnological changes are mainly controlled by oxygenation, although the availability of benthic food cannot be discarded. Changes in oxygenation and rate of sedimentation can be correlated with the registered variations in the Bouma sequence of the distal turbiditic beds withi...

【 授权许可】

CC BY-NC