Trend Results : Cretaceous

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Quantifying the volcanic emissions which triggered Oceanic Anoxic Event 1a and their effect on ocean acidification

The Cretaceous Oceanic Anoxic Event 1a (Early Aptian) is thought to be causally related to the eruption of the Ontong–Java Plateau large igneous province. This study uses osmium isotope records to quantify the magnitude of the respective CO2 emissions up to the onset of Ocean Anoxic Event 1a, and model the associated changes in carbonate […]

New Species of Long-Necked Dinosaur Uncovered in Australia

5 days agoTechnology / Gadgets : Gizmodo

Introducing Savannasaurus, a gigantic long-neck dinosaur that lived during the Cretaceous period some 100 million years ago. Its discovery sheds new light on sauropod evolution as well as how these impressive beasts managed to conquer the globe. Read more...

How the Cretaceous coastline of North America affects US presidential elections

5 days agoHumor / odd :

That’s a portion of the 2012 US Presidential election map of the southern states broken down by county: blue ones went Barack Obama’s way and counties in red voted for Mitt Romney. But let’s go back to the Cretaceous Period, which lasted from 145 million years ago to 65 million years ago. Show More Summary

Temperature and salinity of the Late Cretaceous Western Interior Seaway

The Western Interior Seaway (WIS) was a shallow and expansive body of water that covered the central United States during the Late Cretaceous. Attempts to reconstruct temperatures in the seaway using the oxygen isotopic composition of...Show More Summary

The cause of Late Cretaceous cooling: A multimodel-proxy comparison

Proxy temperature reconstructions indicate a dramatic cooling from the Cenomanian to Maastrichtian. However, the spatial extent of and mechanisms responsible for this cooling remain uncertain, given simultaneous climatic influences of tectonic and greenhouse gas changes through the Late Cretaceous. Show More Summary

Families Find Fossils of a Cretaceous “Swordfish”

Australopachycormus hurleyi – Rare Fossils Found The fearsome marine reptiles that once inhabited the Western Interior Seaway of North America led to this shallow, Cretaceous-age, inland sea being described as “Hell’s Aquarium”, but at the same time much of the land we know now as Australia was covered by an equally dangerous marine environment.  Amongst […]

Unique skin impressions of last European dinosaurs discovered in Barcelona

A geological research conducted in the village of Vallcebre, near Barcelona, to study the origins of rock sediments from the Late Cretaceous period (approx. 66 million years ago) has revealed an extraordinary artefact.

Ancient Bird Voice Box Sheds Light on the Voices of Dinosaurs

The Oldest Bird Voice Box – Honking in Antarctica The identification of the vocalisation organ in the fossilised remains of a Late Cretaceous bird has provided scientists with an insight into the sounds you might have heard had you visited Antarctica around 66 million years ago.  This bird voice box (called the syrinx), is the […]

Ancient Ducks Honked and Quacked Just Like They Do Today

If you were walking around Antarctica toward the end of the Cretaceous 66 million years ago, you may have heard a very familiar sound: the riotous honking of ducks. That's the conclusion of an analysis of the oldest bird vocal organ ever discovered. Show More Summary

Oldest fossil of bird's voicebox gives new hint at soundscape of the Cretaceous

66m-year-old syrinx of Vegavis iaai suggests that creature could honk and quack and confirms some modern bird groups lived alongside the dinosaurs The oldest evidence of a bird’s voice box has been found among the fossilised remains of a duck-like creature that lived more than 66 million years ago. Show More Summary

Aptenoperissus burmanicus: A Wingless Parasitic Wasp Found in Cretaceous Burmese Amber

Bizzare wingless parasitic wasp from mid-Cretaceous Burmese amber (Hymenoptera, Ceraphronoidea, Aptenoperissidae fam. nov.) Authors: Rasnitsyn et al Abstract: A strange wingless female parasitic wasp from mid-Cretaceous Burmese amber is described as Aptenoperissus burmanicus sp. Show More Summary

Mammals hit harder than thought by end-Cretaceous extinction

Mammals, unlike the remaining nonavian dinosaurs and many other animals, are thought to have fared relatively well through the massive meteorite impact and protracted volcanism at the end of the Cretaceous 66 million years ago. After the extinction, mammals went on to dominate terrestrial ecosystems. Show More Summary

A new spalacolestine mammal from the Early Cretaceous Jehol Biota

A new spalacolestine mammal from the Early Cretaceous Jehol Biota and implications for the morphology, phylogeny, and palaeobiology of Laurasian ‘symmetrodontans’ Authors: Han et al Abstract: ‘Symmetrodontans’ are extinct mammals characterized by having a reversed-triangle molar pattern in which three main cusps define a triangular molar crown. Show More Summary

Giant Dinosaur Footprint from the Gobi Desert

Giant Dinosaur Footprint from the Gobi Desert The Upper Cretaceous formations of the Gobi Desert have provided scientists with a treasure trove of dinosaur fossil bones and teeth to study.  Trace fossils such as footprints are much rarer.  However, last month a joint Japanese and Mongolian research team uncovered a beautifully preserved natural cast of […]

Forfexopterus jeholensis: a new Archaeopterodactyloid Pterosaur From Cretaceous China

A new archaeopterodactyloid pterosaur from the Jiufotang Formation of western Liaoning, China, with a comparison of sterna in Pterodactylomorpha Authors: Jiang et al Abstract: Eleven species of archaeopterodactyloid pterosaurs have been reported in China, mostly from the Yixian Formation of western Liaoning. Show More Summary

Structure and homology of Psittacosaurus tail bristles

Structure and homology of Psittacosaurus tail bristles Authors: Mayr et al Abstract: We examined bristle-like appendages on the tail of the Early Cretaceous basal ceratopsian dinosaur Psittacosaurus with laser-stimulated fluorescence imaging. Show More Summary

Not All End Cretaceous Pterosaurs were Giants

A Small Azhdarchoid Pterosaur from Late Cretaceous British Columbia As the Cretaceous progressed, so the once diverse and dominant Pterosauria began to be replaced by the rapidly evolving and radiating Aves (birds).  When it came to aeronautics, feathers were better than flaps of skin.  The last of the flying reptiles, those that survived into the […]

A New Small Pterosaur From Late Cretaceous North America

As the Cretaceous fossil record enters its final two stages - the Campanian and Maastrichtian - several unusual things seem to happen in the world of flying reptiles. Firstly, we see the end result of a steady drop off in pterosaur diversity...Show More Summary

Newly Discovered Tiny Pterosaur Flew With Early Birds

It has long been thought that pterosaurs – everyone’s favorite flying reptiles – had the skies to themselves until the late Cretaceous period when they died out and were replaced by birds. It seemed logical since pterosaur fossils were rarely found with early bird fossils. That’s no...

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