Adriana Ocampo has led six research expeditions to study what geological formation that is more than 180 km in diameter and 20 km in depth
Chicxulub crater The Chicxulub crater ( ; ] ) is an impact crater buried underneath the Yucatán Peninsula in Mexico. Its center is located near the town of Chicxulub, after which the crater is named. It was formed by a large asteroid or comet about 10 to 15 kilometres (6 to 9 miles) in diameter, the Chicxulub impactor, striking the Earth. The date of the impact coincides precisely with the Cretaceous–Paleogene boundary (K–Pg boundary), slightly less than 66 million years ago, and a widely accepted theory is that worldwide climate disruption from the event was the cause of the Cretaceous–Paleogene extinction event, a mass extinction in which 75% of plant and animal species on Earth suddenly became extinct, including all non-avian dinosaurs. The crater is more than 180 km in diameter and 20 km in depth, well into the continental crust of the region of about 10–30 km depth. It makes the feature the third of the largest confirmed impact structures on Earth.
Alcheringa (journal) Alcheringa: An Australasian Journal of Palaeontology is the official journal of the Association of Australasian Palaeontologists. The journal is international in scope and publishes articles on all aspects of palaeontology and its ramifications into the earth and biological sciences, including: taxonomy, biostratigraphy, micropalaeontology, vertebrate palaeontology, palaeobotany, palynology, palaeobiology, palaeoanatomy, palaeoecology, biostratinomy, biogeography, chronobiology, biogeochemistry and palichnology. The journal was established in 1975 and is currently published as four issues per year. Alcheringa is derived from the Arrernte language of the Arrernte aboriginal people of the Alice Springs area of central Australia. Alcheringa (also spelt "altjeringa") is the popularized English version of an Arunta expression that means 'in the beginning' or 'from all eternity'. "Alcheringa" is also the name given to a 2.7-2.8 billion year old stromatolite from the Pilbara region of Western Australia, and symbolizes the antiquity of life and its record in sedimentary rocks. An image of the stromatolite is illustrated on the cover of the journal.