acraman crater map

 

585-587. 2002. 1989. 1990. 160, p. 545-554. 1988. From Williams, Schmidt and Boyd (1996). Williams, G. E., Acraman: A major impact structure from the Neoproterozoic of Australia. 29-35. 2003. Proceedings of the Royal Society of Victoria, v. 106, pp. Williams had indeed found a meteorite crater, old and eroded but still Australia’s largest. Williams, G. E., The Acraman impact structures: Source of ejecta in late Precambrian shales, South Australia. and Keays,R.R., Spherules and shard-like clasts from the late Proterozoic Acraman impact ejecta horizon, South Australia. Glikson, A. Y., Mega-impacts and mantle-melting episodes: tests of possible correlations. La découverte du cratère et celle, indépendante, de ses éjectas a été publiée dans la revue Science en 1986 [1], [2]. Organic Geochemistry 37 P. 189 - 207. 2003. Lunar and Planetary Science XXIV, pp. Extreme erosion over time has eaten away much of the original structure of the Acraman Crater, requiring scientists to infer its initial size indirectly. 1994. Its location in this basalt field suggested to some geologists that it was a volcanic crater. 209-219, 2010. 587-592, 1999, Grey, K., Walter, M.R., Calver, C.R., Neoproterozoic biotic diversification: Snowball Earth or aftermath of the Acraman impact?, Geology, v. 31, pp. Wallace, M. W., Williams, G.E., Gostin, V.A. Williams, G. E., The Acraman structure - Australia's largest impact scar. Acraman je hluboce erodovaný impaktní kráter v Gawler Ranges v Jižní Austrálii.Jeho jméno je odvozeno od jezera Acraman, kruhového jezera o velikosti asi 20 km. Episodes, v. 13, pp. Australian Journal of Earth Sciences, v. 38, pp. 1996. No. Keays, R., Schaefer, B., Wallace, M., Lambert,D., The Acraman Impact Event Horizon: Relative contributions of meteoritic, diagenetic and host rock Cu and PGE from Re-Os Isotopes, 17th Australian Geological Convention, Hobart, Tasmania 8-13th Feb 2004. 443-451. AGSO Journal of Australian Geology & Geophysics, v. 16, pp. 1996. Raub, T. D., Evans, D. A. D., Global Setting of the Acraman Impact: Magnetostratigraphy as a relative chronometer with Palaeogeographic power, 17th Australian Geological Convention, Hobart, Tasmania 8-13th Feb 2004. AGSO Journal of Australian Geology & Geophysics, v. 16, pp. 1986. 1989. Locația sa este marcată de Lacul Acraman, un lac circular care are aproximativ 20 km în diametru. 1986. Its location is marked by Lake Acraman, a circular ephemeral playa lake about 20 kilometres in diameter. Kara crater. 90 km, 450 million year old crater in southern Australia 1079-1080. and Keays,R.R., The late Proterozoic Acraman impact - Towards an understanding of impact events in the sedimentray record. Aeromagnetic image of the Acraman area of the Gawler Craton, covering the Landsat scene (see image below). International Workshop on Meteorite Impact on the Early Earth, Perth, Australia, LPI Contrib. AGSO Journal of Australian Geology & Geophysics, v. 16, pp. Miura, Y., Kato, T., Anomalous shocked quartz in Australian impact craters (abstract). 161-165. No. 157, pp. Geology, v. 18, pp. 2. Acraman crater is a deeply eroded impact crater in the Gawler Ranges of South Australia. 589-590. Landsat scene 15 February 1973, scene center S31-30 E135-51. Specs: Located in what is… Sure enough, in the strata above this ejecta layer a completely new type of acritarch group appears and diversifies rapidly, while the pre-impact groups simply disappear. 16-17. 587-607. 1990. 1991. The Acraman Impact structure, centred on a crater at Lake Acraman in the Gawler Craton, South Australia, is one of the largest known in Australia and in the top ten known globally. Wallace, M. W., Gostin, V.A. Acraman crater is a deeply eroded impact crater in the Gawler Ranges of South Australia. Grieve, R. A. F., The record of impact on Earth: Implications for a major Cretaceous/Tertiary impact event. Gostin, V. A., Keays, R.R. %PDF-1.4 %���� The bolide diameter was approximately 4.8 km with a collapse crater 85-90 km across, and the ejecta is spread over a radius of greater than 560 km. Over time, the impact depression naturally accumulated water and formed the salty Lake Acraman . Williams, G. E., Wallace, M. W., The Acraman asteroid impact, South Australia: magnitude and implications for the late Vendian environment. and Shadenkov,Ye.M., The Geology of Astroblemes (in Russian). 4. El cráter Acraman es un cráter de impacto muy erosionado localizado en la cordillera Gawler, Australia Meridional. Haines P. W., Tekite-bearing flood deposites in NE Thailand - Palaemagnetic evidence suggests deposition comtemporaneous with - 0.8 MA impact, 2004. Acraman Impact Crater (Google Maps). Williams, G. E., Gostin, V. A., Acraman - Bunyeroo impact event ( Ediacaran), South Australia, and environmental consequences: twenty five years on, Australian Journal of Earth Sciences 52, P. 607 - 620. Science, v. 233, pp. No. 283-289. 209-224. Biol. GAC/MAC, p. A100. Landsat scene covering most of the Acraman impact structure in the Mesoproterozoic Gawler Range Volcanics, showing: 1, Lake Acraman within the Acraman depression; 2, Lake Gairdner; 3, Lake Everard; 4, the Yardea corridor at 85-90 km diameter. Nature, v. 340, pp. From Williams, Schmidt and Boyd (1996). These outcrops led scientists to the Acraman structure in South Australia, which was shortly thereafter confirmed as an impact structure, and as the source crater of the Bunyeroo impact ejecta layer. Rather than the simple bowl shape we often associate with craters, Acraman has a complicated surface with variations in elevation. For photographs, maps, references, and other information, see the entry on the PASSC Website 2004. A map of the suspected meteorite craters in Australia. Screen capture from NASA World Wind. 1990. 47-48. Mines and Energy Review, South Australia, No. 746, pp. Acraman An estimated 580 million years, an asteroid slammed into the stony hills of what is now part of South Australia, creating the 56-mile wide Acraman crater. Date generale. The Australian Geologist, v. 97,. This can be correlated with little doubt to the 90 km Acraman structure in South Australia, which formed at 580 Ma with an energy likely to have had a major influence on life. 1992. 235-280, 2000. Schmidt, P. W., Williams, G. E., Palaeomagnetic correlation of the Acraman impact structure and the Late Proterozoic Bunyeroo ejecta horizon, South Australia. 1990. 431-442. AGSO Journal of Australian Geology & Geophysics, v. 16, pp. Meteoritics, v. 25, pp. 2006. 1996. Koeberl, C., Martinez-Ruiz, F., The Stratigraphic Record of Impact Events: A Short Overview, Impact Markers in the Stratigraphic Record p. 1 - 40. The discovery of the crater and independent discovery of its ejecta were first reported in the journal Science in 1986. Wallace, M. W., Keays, R.R. Formed by a large bolide impact, the crater is 90 km in diameter and struck an estimated 590 million years ago during the Ediacaran period. 2004. Geological studies have found that, over time, Acraman’s surface eroded several kilometers below the original crater floor. 1990. Objev kráteru a nezávislý objev jeho ejekty byl poprvé zveřejněn v časopise Science v roce 1986. Shoemaker, E. M., Shoemaker, C. S., Proterozoic impact record of Australia (abstract). Landsat scene 15 February 1973, scene center S31-30 E135-51. Acraman crater and infer the dynamics and likely environmental effects of the impact event. and Gostin,V.A., Sedimentology of the Late Proterozoic Acraman impact ejecta horizon, South Australia (abstract). 1991. 347-357. Leningrad, Nedra, 231 p. 1980. Its location is marked by Lake Acraman, a circular ephemeral playa lake about 20 km in diameter. Its location is marked by Lake Acraman, a circular ephemeral playa lake about 20 kilometres (12 mi) in diameter. Australian Journal of Earth Sciences, v. 36, pp. The diameter of the Acraman structure is at least 90 kilometers, with some outer arcuate features at 150 kilometers diameter. International Workshop on Meteorite Impact on the Early Earth, Perth, Australia, Contrib. Hawke, P. J., A re-evaluation of the size of the Acraman Impact Structure, Australia, 2003. * pre-1977 K-Ar, Ar-Ar and Rb-Sr ages recalculated using the decay constants of Steiger and Jager (1977) Ages in millions of years (Ma) before present. Shoemaker, E. M., Shoemaker, C. S., The Proterozoic impact record of Australia. Sutherland, F. L., Meteoritic versus volcanic events at the Cretaceous Tertiary boundary - An Australian perspective. Wallace, M. W., Gostin, V.A. Pufahl P., James N., Bone Y., Lukasik J., Plocene sedimentation in a shallow, coolwater, marine culf, Murray Basin, South Australia, 2004. McKirdy, D. M., Webster, L. J. , Arouri, K. R. , Grey, K. and Gostin, V. A., Contrasting sterane signatures in Neoproterozoic marine rocks of Australia before and after the Acraman asteroid impact. 2004. Its location is marked by Lake Acraman, a circular ephemeral playa lake about 20 km in diameter.. Investigations and satellite mapping suggested that 35km-wide Lake Acraman in the Gawler Ranges was an eroded meteorite crater, while Lake Gairdner and fragmented saltpans (such as Lake Torrens) further east were set in ripples caused by the force of the strike. and Keays,R.R., Sedimentology and geochemistry of the Bunyeroo impact ejecta horizon, South Australia (abstract). Earth Impact Effects Program Damage Map Version Gareth Collins, H. Jay Melosh and Robert Marcus. Asteroid impact date: Estimated 580 million years ago. The Wolfe Creek crater in Western Australia is the best known meteorite crater in Australia. ER Mapper file: total magnetic intensity, pseudocolor (Gaussian equalisation histogram stretch), sun angle from the northeast. En superficie se corresponde con el Lago Acraman, de unos 20 km de diámetro. Acraman crater is a deeply eroded impact crater in the Gawler Ranges of South Australia. 542-544. Williams, G. E., Schmidt, P.W. Hill, A. C., Gorjan, P. , Walter, M. R., Carbon, Nitrogen and Sulfur stable-isotope changes before and after the ~580 MA (Late Neoproterozoic) Acraman Impact Event. Acraman crater is an impact crater in South Australia, Australia. and Keays,R.R., Discovery of the Acraman impact ejecta blanket in the Officer Basin and its stratigraphic significance. Gurov, E. P., The Acraman impact structure: Estimation of the diameter by the ejecta layer thickness (abstract). Geological Society of America, Special Paper 190, pp. 1987. From Williams, Schmidt and Boyd (1996). 60-61. Surface water (darker blue) in Lake Gairdner helps define an arcuate trend (5) at ~150 km diameter that continues westward to Lake Everard. India’s Lonar Crater began causing confusion soon after it was identified. the Planetary and Space Science Centre University of New Brunswick Fredericton, New Brunswick, Canada, Arouri, K., et al., Reconnaissance sedimentology and hydrocarbon biomarkers of Ediacarian microbial mats and acritarchs, lower Ungoolya Group, Officer Basin, Precambrian Research , v. 100, pp. 1883-1892, 2007, Hill, A.C, et al., New records of Late Neoproterozoic Acraman ejecta in the Officer Basin, Australian Journal of Earth Sciences, v. 51, pp. Williams, G. E., The Acraman impact structure, South Australia (abstract). 1996. Impact Crater: This collection contains thousands images of impact craters from all continents except Antarctica. Geologicheskii Zhurnal, v. 47, pp. Rev., 77, P. 279 - 310. 2005. Acraman is a complex crater. 143-145. Formed by a large bolide impact, the crater is 90 km in diameter and struck an estimated 590 million years ago during the Ediacaran period. Lonar Crater sits inside the Deccan Plateau—a massive plain of volcanic basalt rock leftover from eruptions some 65 million years ago. Welcome to the Earth Impact Effects Program: an easy-to-use, interactive web site for estimating the regional environmental consequences of an impact on Earth. ... Lake Acraman in South Australia (greater than 35km) and Tookoonooka in Queensland (50km in diameter). The map above shows that fewer craters have been discovered in South America, Asia, Africa and Australia, perhaps because these continents have been less explored in geological terms. P.W., Jenkins, R.J.F., Compston, W. and Williams,I.S., Impact ejecta horizon within late Precambrian shales, Adelaide geosyncline, South Australia. 198-200. The discovery of the crater and independent discovery of its ejecta were first reported in the journal Science in 1986. Abstracts of the International Workshop on Meteorite Impact on the Early Earth, Perth, Australia, pp. 1987. Gostin, V. A., Haines. 25-37. 200-203. 1996. Gostin, V. A., Keays, R.R. 1993. Hill, A.C, et al., New records of Ediacaran Acraman ejecta in drillholes from the Stuart Shelf and Officer Basin, South Australia, Meteoritics and Planetary Science, v. 42, pp. At the time, though, more concerned with mineral exploration for a company, he didn’t publish his findings. Descoperirea craterului și descoperirea independentă a ejecțiilor sale au fost raportate în revista Science în 1986. Acraman South Australia, Australia D = 90 km, Age = ~ 590 Ma; exposed. 1994. and Boyd,D.M., Magnetic signature and morphology of the Acraman impact structure, South Australia. Geological Society of America Special Paper 293, pp. Whitehead J., Ehrmann W., Hillenbrand C-D., Hart C., Harwood D. and Tavian M., Micene marine strata from inland Antarctica - Palaeoenvironmental reconstruction from diatom, mollusc, sediment and geochemical evidence, 2004. This crater is now more commonly known as Lake Acraman, with its diameter of 20km, it is visible on the map of Australia. DEM Image Provided by Dr. Carlos Roberto de Souza Filho, 5 & 6. 2004. Dovezile care atestă impactul includ prezența conurilor distruse și a cuarțului șocat în roca de bază de pe insulele din Lacul Acraman. Acraman crater is an eroded meteorite impact crater centred on the 20 km diameter Lake Acraman in South Australia. Gostin, V.A., Zbik, M., Petrology and microstructure of distal impact ejecta from the Flinders Ranges, Australia, Meteoritics and Planetary Science, v. 34, pp. Lunar and Planetary Science XIX, pp. 4. H��W�n��E^����Jþ���. 1990. Grieve, R. A. F., Meteorite impact studies featured in Australia. 1996. 281-282. Image Provided by Dr. Carlos Roberto de Souza Filho, Site developed and maintained by Haines, P. W., Impact Cratering and Distal Ejecta: The Australian Record. World map in equirectangular projection of the craters on the Earth Impact Database as of November 2017 ... Acraman crater, 85 to 90 km (53 to 56 mi) Charlevoix crater, 54 km (34 mi) ... Impact Meteor Crater Viewer Google Maps Page with Locations of Meteor Craters around the … 2005. 746, pp. Williams, G., Gostin, V., Wallace., The Acraman Impact Event, South Australia: Recognition, Manitude and Implications for the Late Vendian Environment, 17th Australian Geological Convention, Hobart, Tasmania 8-13th Feb 2004.