8 research outputs found
Electrophonic sounds from the re-entry of the Molniya 1-67 satellite over Australia: Confirmation of the electromagnetic link.
Accepted versio
14C and 14C-10Be terrestrial ages of meteorites from Western Australia and other desert environments.
Accepted versio
The desert fireball network: A new camera network in the western Australian Nullarbor
Accepted versio
First light for the desert fireball network
Accepted versio
Comet and Meteorite Traditions of Aboriginal Australians
Of the hundreds of distinct Aboriginal cultures of Australia, many have oral
traditions rich in descriptions and explanations of comets, meteors,
meteorites, airbursts, impact events, and impact craters. These views generally
attribute these phenomena to spirits, death, and bad omens. There are also many
traditions that describe the formation of meteorite craters as well as impact
events that are not known to Western science.Comment: Encyclopaedia of the History of Science, Technology, and Medicine in
Non-Western Cultures, 2014. Edited by Helaine Selin. Springer Netherland
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Characterization and significance of shocked quartz from the Woodleigh impact structure, Western Australia
We re-examined the buried Woodleigh structure in Western Australia, which has been inferred to be a multi-ringed, 120 km diameter impact crater, because the proposed size and possible synchronicity with one of the pre-Mesozoic mass extinction events has attracted controversy. We undertook a detailed study of the petrology and mineralogy of a number of samples of core from the Woodleigh-1 borehole that was drilled into the central uplift of the structure. Crystalline Proterozoic basement rocks comprising granites and gneisses in the Woodleigh-1 core contain minor brecciation in discrete veins and reveal clear evidence of shock metamorphism over the full extent of the core. Imaging of laboratory-etched quartz showed that a large number of grains contain shock deformation lamellae. Microstructural and crystallographic analysis of these lamellae by TEM showed that they are planar deformation features (PDFs) that have subsequently undergone annealing and water assisted recrystallization. The available geological, petrographic, and mineralogical evidence suggest that Woodleigh is an eroded impact crater that is nearer to 60 km than 120 km in diameter. Future drilling projects should better constrain the level of erosion, and may reveal any preserved impact lithologies.The Meteoritics & Planetary Science archives are made available by the Meteoritical Society and the University of Arizona Libraries. Contact [email protected] for further information.Migrated from OJS platform February 202