Foraminiferal stratigraphy in a marine Eemian-Weichselian sequence at Apholm

• Main Author: Karen Luise Knudsen
• Other Authors: The Pennsylvania State University CiteSeerX Archives
• Format: Text
• Language: English
• Published: 1984
• Subjects: Arctic; Norwegian Sea; Foraminifera*
• Online Access: http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.505.4033; http://2dgf.dk/xpdf/bull32-03-04-169-180.pdf

Tjf] Undisturbed core material is investigated for the first time from a marine Quaternary sequence through ^ \ 5 * [j, the Eemian of North Jutland. Core samples were examined from 86 m-190 m depth in a 202.6 m deep A ^ ° boring at Apholm. The marine sequence from that interval was subdivided into 4 biozones based on its foraminiferal content. Zone AP3 (190-140 m) contains boreal and boreal-lusitanian faunas indicating a water depth of at least 60-100 m. This zone is referred to the Eemian Interglacial. The Late Saalian/Eemian transition is identified at 190.2 m depth (AP4). The faunas of zone AP2 (140-113 m) record the onset of a major deterioration in climate and a considerable shallowing of the marine environment. The climate is then seen to fluctuate between arctic and boreal-arctic in zone API (113 m to at least 86 m). This indicates the succeeding stadial and interstadial periods. Zones AP2 and API are referred to the Early and Middle Weichselian. The foraminiferal zones at Apholm are compared with the marine sequence at Skærumhede. In addition, an attempt is made to relate these zones to the oxygen isotope chronology and to the Late Quaternary climatic regimes of the Norwegian Sea.