Dalgaranga crater

Dalgaranga crater is a small meteorite impact crater located on Dalgaranga pastoral station 75 km west of Mount Magnet (or north of Yalgoo) in Western Australia. It is only 24 m in diameter and 3 m deep, making it Australia's smallest impact crater (with exception of the smallest members of the Henbury crater field).^[1][2] Though reputedly discovered much earlier, it was first reported in the scientific literature in 1938.^[3] The bedrock at the site is weathered Archaean granite of the Yilgarn Craton. The discovery of fragments of mesosiderite stony-iron meteorite around the crater confirms an impact origin,^[4] making this crater unique as the only one known to have been produced by a mesosiderite projectile. Asymmetries in the crater structure and the ejecta blanket imply that the projectile impacted at low angle from the south-southeast.^[5] The age is not accurately constrained but must be young because it is so well preserved for its small size, and the meteorite fragments have not weathered away; some authors suggest an age of as young as 3000 years. ^[6]

References

1. ^ "Dalgaranga". Earth Impact Database. University of New Brunswick. http://www.passc.net/EarthImpactDatabase/dalgaranga.html. Retrieved 2009-08-19. 
2. ^ Bevan A.W.R. 1996. Australian crater-forming meteorites. AGSO Journal of Australian Geology & Geophysics 16, 421–429.
3. ^ Simpson E.S. 1938. Some new and little known meteorites found in Western Australia. Mineralogical Magazine 25, 157–171.
4. ^ Nininger H.H. & Huss G.I. 1960. The unique meteorite crater at Dalgaranga, Western Australia. Mineralogical Magazine 32, 619–639.
5. ^ Shoemaker E.M., Macdonald F. A. & Shoemaker C.S. 2005. Geology of five small Australian impact craters. Australian Journal of Earth Sciences 52, 529–544. Abstract
6. ^ Shoemaker E.M. & Shoemaker C.S. 1988. Impact structures of Australia (1987). Lunar and Planetary Science Conference XIX, 1079–1080. Abstract

Coordinates: 27°38′6″S 117°17′20″E / 27.635°S 117.28889°E / -27.635; 117.28889

This article about a specific Australian geological feature is a stub. You can help Wikipedia by expanding it.v · Categories: Earth Impact Database Impact craters of Australia Geology of Western Australia Mid West (Western Australia) Western Australia geography stubs Australian geology stubs Wikimedia Foundation. 2010. Игры ⚽ Поможем сделать НИР Euroa, Victoria Decaturville crater Look at other dictionaries: Dalgaranga Crater — ▪ crater, Australia       small meteorite crater near Dalgaranga, Western Australia. Known earlier but not attributed to meteoritic origin until 1938, it is 70 feet (21 m) in diameter and 11 feet deep. Both iron and stony meteorite fragments have …   Universalium Liste De Cratères D'impact Sur Terre — Cet article est une liste de cratères d impact sur Terre, Sommaire 1 Liste des cratères terrestres 2 Par zones géographiques 2.1 Afrique 2.2 …   Wikipédia en Français Liste de crateres d'impact sur Terre — Liste de cratères d impact sur Terre Cet article est une liste de cratères d impact sur Terre, Sommaire 1 Liste des cratères terrestres 2 Par zones géographiques 2.1 Afrique 2.2 …   Wikipédia en Français Liste de cratères d'impact sur Terre — Cette liste est incomplète ou mal ordonnée. Votre aide est la bienvenue ! Cet article est une liste de cratères d impact sur Terre, Sommaire 1 Liste des cratères terrestres 2 …   Wikipédia en Français Liste de cratères d'impact sur terre — Cet article est une liste de cratères d impact sur Terre, Sommaire 1 Liste des cratères terrestres 2 Par zones géographiques 2.1 Afrique 2.2 …   Wikipédia en Français Liste der Einschlagkrater der Erde —  Karte mit allen Koordinaten: OSM, Google oder …   Deutsch Wikipedia 18+ © Academic, 2000-2024 Contact us: Technical Support, Advertising Dictionaries export, created on PHP, Joomla, Drupal, WordPress, MODx. Mark and share Search through all dictionaries Translate… Search Internet Share the article and excerpts Direct link … Do a right-click on the link above and select “Copy Link”