Bazsites.com Cretaceous Tertiary
Directory Topics
On the Web
- Dinosaurs and Extinctions - From the Classroom of the Future website. Includes an introduction to the major theories on the Cretaceous-Tertiary extinction event.
- The End-Cretaceous (K-T) Extinction - Discusses geologic setting, possible causes, and species affected by the event at the end of the Mesozoic Era.
- Dinosaur Volcano Greenhouse Extinction - The dinosaur extinction occurred during a Deccan Traps volcanism-induced greenhouse climate change. By Dewey McLean.
- Science Daily: A World Ruled By Fungi - After the extinction event, the dominant life form was the fungi that thrived in the dark. Researchers have constructed a timeline of the fungal takeover and eventual replacement by resurgent plant life.
- Stratigraphy and Paleogeography from Colombia - Small collection of scientific papers on the sedimentary rock sequences of Cretaceous and Tertiary basins in Colombia.
- Blast from the Past - The National Museum of Natural History exhibit on a meteor that struck the Earth 65 million year ago.
- Dinosaur Extinction - Short summaries of some theories of dinosaur extinction.
- The Great Mystery - Information on current and past hypotheses on dinosaur extinctions from the University of California Paleontology Museum.
- 101 Crazy Dinosaur Theories - Theories about dinosaur extinction
- Ward, P. - Cretaceous-Tertiary extinction (University of Washington).
Wikipedia Articles
- Iridium anomaly - The term iridium anomaly commonly refers to an unusual abundance of the chemical element iridium in a layer of rock strata, often taken as evidence of an extraterrestrial impact event because of the case of such an anomaly at the Cretaceous–Tertiary boundary (often abbreviated K-T boundary). Iridium is a very rare element in the Earth's crust, but is found in anomalously high concentrations (around 100 times greater than normal) in a thin world-wide layer of clay marking the boundary between the Cretaceous and Tertiary periods, 65 million years ago.
- Cretaceous–Tertiary extinction event - The Cretaceous–Tertiary extinction event was the large-scale mass extinction of animal and plant species in a geologically short period of time, approximately (mya). It is widely known as the K–T extinction event and is associated with a geological signature, usually a thin band dated to that time and ...
- Thescelosaurus - Thescelosaurus (IPA: // or //, from the Greek θεσκελο-/thescelo- meaning "godlike", "marvelous", or "wondrous" and σαυρος/saurus "lizard") was a genus of small ornithopod dinosaur that appeared at the very end of the Late Cretaceous period in North America, and was a member of the last dinosaurian fauna before the Cretaceous-Tertiary extinction event around 65.5 million years ago.
- Ecological collapse - Ecological Collapse refers to a situation where an ecosystem suffers a drastic, if not permanent, reduction in carrying capacity for all organisms, often resulting in mass extinction. Usually, an ecological collapse can be precipitated by a disastrous event occurring on a small time scale, such as the Cretaceous-Tertiary extinction event which was an ecological collapse widely believed to be caused by an impact event.
- Waimanu - Waimanu was a genus of early penguin which lived soon after the Cretaceous-Tertiary extinction event, lending support to the theory that the radiation of modern birds took place before the extinction of the dinosaurs, not after as others had proposed. While it was a very early member of the sphenisciformes, Waimanu was flightless (like all modern members of its order).