Response of marine palynomorphs to Neogene climate cooling in the Iceland Sea, ODP Hole 151-907A ...

• Main Authors: Schreck, Michael, Méheust, Marie, Stein, Ruediger, Matthiessen, Jens
• Format: Article in Journal/Newspaper
• Language: English
• Published: PANGAEA 2013
• Subjects: Ocean Drilling Program ODP; Priority Programme 1158 Antarctic Research with Comparable Investigations in Arctic Sea Ice Areas SPP1158; Antarc*; Antarctic; Iceland; Sea ice
• Online Access: https://dx.doi.org/10.1594/pangaea.807163; https://doi.pangaea.de/10.1594/PANGAEA.807163

The present study on ODP Leg 151 Hole 907A combines a detailed analysis of marine palynomorphs (dinoflagellate cysts, prasinophytes, and acritarchs) and a low-resolution alkenone-based sea-surface temperature (SST) record for the interval between 14.5 and 2.5 Ma, and allows to investigate the relationship between palynomorph assemblages and the paleoenvironmental evolution of the Iceland Sea.A high marine productivity is indicated in the Middle Miocene, and palynomorphs and SSTs both mirror the subsequent long-term Neogene climate deterioration. The diverse Middle Miocene palynomorph assemblages clearly diminish towards the impoverished assemblages of the Late Pliocene; parallel with a somewhat gradual decrease of SSTs being as high as 20 °C at ~13.5 Ma to around 8 °C at ~3 Ma.Superimposed, palynomorph assemblages not only reflect Middle to Late Miocene climate variability partly coinciding with the short-lived global Miocene isotope events (Mi-events), but also the initiation of a proto-thermohaline ... : Supplement to: Schreck, Michael; Méheust, Marie; Stein, Ruediger; Matthiessen, Jens (2013): Response of marine palynomorphs to Neogene climate cooling in the Iceland Sea (ODP Hole 907A). Marine Micropaleontology, 101, 49-67 ...