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The convincing identification of terrestrial meteorite impact structures: What works, what doesn't, and why
Abstract In the geological sciences it has only recently been recognized how important the process of impact cratering is on a planetary scale, where it is commonly the most importantExpand
Ascent of Dinosaurs Linked to an Iridium Anomaly at the Triassic-Jurassic Boundary
Analysis of tetrapod footprints and skeletal material from more than 70 localities in eastern North America shows that large theropod dinosaurs appeared less than 10,000 years after the Triassic-Jurassic boundary, marking the establishment of dinosaur-dominated communities that prevailed for the next 135 million years. Expand
The Chicxulub Asteroid Impact and Mass Extinction at the Cretaceous-Paleogene Boundary
Records of the global stratigraphy across this boundary are synthesized to assess the proposed causes of the Cretaceous-Paleogene boundary and conclude that the Chicxulub impact triggered the mass extinction. Expand
Geochemistry and age of Ivory Coast tektites and microtektites
Abstract Ivory Coast tektites were first reported in 1934 from a geographically restricted area at Ivory Coast, West Africa. Although some additional specimens have been found later, the total numberExpand
Experimental shock deformation in zircon: a transmission electron microscopic study
Abstract In recent years, apparently shock-induced and, thus, impact-characteristic microdeformations, in the form of planar microdeformation features and so-called strawberry (granular) texture,Expand
Heavy Bombardment on the Earth at ~3.85 Ga: The Search for Petrographic and Geochemical Evidence
The Moon experienced an interval of intense bombardment peaking at -3.85 ± 0.05 Ga; subsequent mare plains as old as 3.7 or 3.8 Ga are preserved. It can be assumed that the early Earth must have beenExpand
Petrology and geochemistry of Antarctic micrometeorites
Abstract The petrology and geochemistry of twentythree chondritic dust particles with masses of 1–47 μg (sizes 100–400 μm) were recovered from blue ice near Cap Prudhomme, Antarctica, and studied byExpand
Impact Stratigraphy: The Italian Record
Introduction: Impact cratering as a geological process.- Distal ejecta and tektites.- Important distal ejecta layers and their source craters.- The umbria-marche sequence.- Impact stratigraphy in theExpand
Geochemistry of intermediate to siliceous volcanic rocks of the Rooiberg Group, Bushveld Magmatic Province, South Africa
Abstract.The volcanic Rooiberg Group represents the earliest phase of Bushveld-related magmatism and comprises, in some areas, the floor and roof rocks of the mafic–ultramafic intrusive units of theExpand