Melanie Aranka Dominique During

• Master of Science
• PhD Student at Uppsala University

Computed tomography has revolutionised the study of the internal three-dimensional structure of fossils. Historically, fossils typically spent years in preparation to be freed from the enclosing rock. Now, X-ray and synchrotron tomography reveal structures that are otherwise invisible, and data acquisition can be fast. However, manual segmentation...

A recent article by DePalma et al. reported that the season of the End-Cretaceous mass extinction was confined to spring/summer on the basis of stable isotope analyses and supplementary observations. An independent study that was concurrently under review reached a similar conclusion using osteohistology and stable isotope analyses. We identified a...

Computed tomography has revolutionised the study of the internal three-dimensional structure of fossils. Historically, fossils typically spent years in preparation to be freed from the enclosing rock. Now, X-ray and synchrotron tomography reveal structures that are otherwise invisible, and data acquisition can be fast. However, manual segmentation...

Computed tomography has revolutionised the study of the internal three-dimensional structure of fossils. Historically, fossils typically spent years in preparation to be freed from the enclosing rock. Now, X-ray and synchrotron tomography reveal structure that is otherwise invisible and data acquisition can be fast. However, manual segmentation of...

The recently discovered mass mortality of fishes from the Tanis Site in the North Dakota portion of the Late Cretaceous Hell Creek Formation contains many well-preserved, three-dimensional skeletons. Among these are representatives of two acipenseriform families, Acipenseridae (sturgeons) and Polyodontidae (paddlefishes). This paper describes two n...

We probably all know about the extinction of the dinosaurs 66 million years ago, from an asteroid hitting the Yucatán peninsula. The impact caused tsunamis and earthquakes. Pieces of molten Earth rock were ejected into space, and later rained back down. This event caused death for everything exposed. We describe how fishes from North Dakota help in...

In a recent paper by DePalma et al., the End-Cretaceous mass extinction was calibrated to spring/summer on the basis of stable isotopic analyses and other data. An independent study, which was concurrently in review and known to DePalma et al,. reached the same conclusion using osteohistology and stable isotope analysis. Notwithstanding this agreem...

The Cretaceous–Palaeogene mass extinction around 66 million years ago was triggered by the Chicxulub asteroid impact on the present-day Yucatán Peninsula1,2. This event caused the highly selective extinction that eliminated about 76% of species3,4, including all non-avian dinosaurs, pterosaurs, ammonites, rudists and most marine reptiles. The timin...

The Cretaceous-Paleogene (KPg) mass extinction ~66 million years ago (Ma) was triggered by the Chicxulub impact on the present-day Yucatán Peninsula. This event caused the extinction of circa 76% of species, including all non-avian dinosaurs, and represents one of the most selective extinctions to date. The timing of the impact and its aftermath ha...

U vindt een samenvatting aan het eind van de tekst. Workspace of Melanie at the VU at the onset of her project, when Sibelco closed the quarry for outsiders for a year, assessing the samples collected by Dennis and Jarmo. Abstract | The Winterswijkse Steen-groeve quarry complex in the east of the Netherlands exposes a ~ 40 m thick sedimentary seque...

The Winterswijkse Steengroeve quarry complex in the east of the Netherlands exposes a ~ 40 m thick sedimentary sequence of intertidal and shallow marine deposits of the Vossenveld Formation dated as Anisian (early Middle Triassic). Here, we present a detailed stratigraphic and sedimentological description combined with geochemical data (carbonate c...

The tetrapod tracks from Winterswijk receive global attention for their abundance and preservation quality, including long trackways and skin- and claw impressions. The footprint association is consistent with a Middle Triassic age. It includes four ichnotaxa: Brachychirotherium paraparvum, Rhynchosauroides peabodyi, Procolophonichnium haarmuehlens...

Placodontiformes are basal, semi-aquatic sauropterygians that mostly preyed upon hard-shelled organisms and often had substantial dermal armour. While their fossil remains are rare, they can be found in Triassic sediments throughout Europe, the Middle East and southern China, often in the form of their unusually large, tablet-shaped teeth. Wintersw...

We describe a tetrapod swimming traceway from the Middle Triassic Vossenveld Formation of the Netherlands. Forty-five individual traces, each consisting of two parallel claw drag marks, were followed over 9 m in a roughly east–west direction. The asymmetry of the traceway geometry indicates the trace maker negotiated a lateral current. The trace ma...

An isolated, completely ossified vertebra tentatively ascribed to the non-cyamodontid placodont Pararcus diepenbroeki is described from the Anisian Vossenveld Formation in Winterswijk, the Netherlands, and compared to other material from the same locality. This fossil is the first completely ossified vertebra of the taxon and most likely originates...