On the Cretaceous time scale

Gradstein, Felix M.; Agterberg, Frits; Ogg, James G.; Hardenbol, Jan; Bäckstrøm, Sven A.

doi:10.1127/njgpa/212/1999/3

Cited by 18 publications

(9 citation statements)

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“…On the other hand, palaeomagnetic dating places Fontllonga 6 close to the base of the chron C31r, indicating an early Maastrichtian age (Table 1). This dating follows the recalibration of the Campanian/Maastrichtian boundary to 71·3 ± 0·5 Ma by Gradstein et al . (1999).…”

Section: Discussionsupporting

confidence: 81%

Neoselachians From the Upper Campanian and Lower Maastrichtian (Upper Cretaceous) of the Southern Pyrenees, Northern Spain

Kriwet¹,

Soler-Gijón²,

López-Martı́nez³

2007

Palaeontology

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Bulk sampling of upper Campanian to lowermiddle Maastrichtian coastal and lagoonal deposits in five sections of the Tremp Formation in the south-central Pyrenees yielded numerous neoselachian teeth. The fauna comprises nine taxa of which three species and one genus are new: Hemiscyllium sp., Lamniformes indet., Paratrygonorrhina amblysoda gen. et sp. nov., Coupatezia trempina sp. nov., Coupatezia sp., Coupatezia? sp., Rhombodus ibericus sp. nov. and Igdabatis indicus. The neoselachian fauna is dominated by small nectobenthic rays. This composition resembles assemblages known from the marine Upper Cretaceous, but differs from nearby localities of the Basque-Cantabrian region and continental selachian associations of the French Pyrenees. The results indicate that Rhombodus might not be a reliable biostratigraphic marker for the Maastrichtian. The faunal composition suggests a shallow trans-Tethyan connection between Eurasia and India at the end of the Cretaceous Period.

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Section: Discussionsupporting

confidence: 81%

Neoselachians From the Upper Campanian and Lower Maastrichtian (Upper Cretaceous) of the Southern Pyrenees, Northern Spain

Kriwet¹,

Soler-Gijón²,

López-Martı́nez³

2007

Palaeontology

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“…The timing of tectonic events in NW-Germany's inverted regions, heavy shading : latational stress regime. (Radiometric ages from Gradstein et al, 1999 (Baldschuhn etal., 1991). Note the migration of the depocentre towards the North during Late Jurassic to Early Cretaceous times.…”

Section: Morphology and Genesis Of Inversion Structuresmentioning

confidence: 99%

Inversion structures in Central Europe - Expressions and reasons, an open discussion

Kockel¹

2003

Netherlands Journal of Geosciences

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The diversity of morphological features of Mesozoic inversion structures in NW Germany as representatives of inversion structures in northern Europe is presented and their origin analysed and geologically dated. The particular role of salt in inverted basins and the re-shaping of pre-existing salt structures during the inversion act is demonstrated and the term 'salt wedge', a Zechstein salt intrusion into salt layers within the Triassic sedimentary pile, introduced. The leading theories on inversion (continent-continent collision, re-activation Variscan features) are discussed and discarded, but no new comprehensive theory was developed. The impact of inversion on HC prospectivity of sedimentary basins is debated and proposals for future interdisciplinary research are made.

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“…Although zonal names should only be used in the area where the fossil actually occurs (e.g., Rawson 2001), particularly ammonite zones are often transferred to other areas, become generalized and deemed to be valid on a global scale. For the Cretaceous, this development is evident by the use of ammonite zones in the various time scales released over the last decades which refer to zonations developed in the Western Tethys, the Western Interior in and the European Boreal (e.g., Obradovich 1993;Gradstein et al 1995Gradstein et al , 1999Gradstein et al , 2008Ogg et al 2004Ogg et al , 2012. In each region, there are ammonite zonal indices that are strictly endemic, e.g., the succeeding Did-ymoceras spp.…”

Section: Concepts Of Biostratigraphymentioning

confidence: 97%

Ammonite Biostratigraphy of the Cretaceous—An Overview

Lehmann

2015

Topics in Geobiology

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On the Cretaceous time scale

Cited by 18 publications

References 0 publications

Neoselachians From the Upper Campanian and Lower Maastrichtian (Upper Cretaceous) of the Southern Pyrenees, Northern Spain

Neoselachians From the Upper Campanian and Lower Maastrichtian (Upper Cretaceous) of the Southern Pyrenees, Northern Spain

Inversion structures in Central Europe - Expressions and reasons, an open discussion

Ammonite Biostratigraphy of the Cretaceous—An Overview

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