RT Book, Section
T1 The palynological record across the Cretaceous-Tertiary boundary in differing palaeogeographical settings from thesouthern Pyrenees, Spain
A1 Fernández Marrón, María Teresa
A1 López Martínez, María Nieves
A1 Fonolla Ocete, José Fernando
A1 Valle-Hernández, M.F
AB North American and Pacific spore-pollen records show a major extinction event at theCretaceous Tertiary (K-T) boundary, and abrupt changes are similarly found in many marineorganisms world-wide. In contrast, records from the Old World reveal little evidence ofterrestrial vegetational change across the boundary. In order to improve the characterization ofchanges across the K-T boundary, palynological assemblages from two sections in the southernPyrenees have been evaluated. The abundance and diversity of trilete fern spores are high inMaastrichtian samples and show a statistically significant decrease during the Danian. The 'fernspike' of low-diversity spores found elsewhere is not recorded in the Pyrenean region. Minorreplacements of taxa across the K-T boundary are also noted, as well as an increase ininaperturate gymnosperm pollen in the Danian. Comparing our two examined sections with oneanother reveals important differences in angiosperm pollen composition.
PB Geological Society of London
SN 1-86239-160-2
YR 2004
FD 2004
LK https://hdl.handle.net/20.500.14352/53914
UL https://hdl.handle.net/20.500.14352/53914
LA eng
NO Projects PB98-0813 and BTE2002-01430 of the Spanish Ministerio de Educación and Ministerio de Ciencia & Tecnologia
DS Docta Complutense
RD 11 abr 2025