australites

Mira otros diccionarios:

• Australite — Un australite. Les australites sont des tectites trouvés en Australie. Ils ont pour la plupart une couleur foncée ou noire et une forme de disque ou de bol que l on ne retrouve pas dans les autres tectites. La NASA a utilisé leur forme pour la… …   Wikipédia en Français

• tektite — /tek tuyt/, n. Geol. any of several kinds of small glassy bodies, in various forms, occurring in Australia and elsewhere, now believed to have been produced by the impact of meteorites on the earth s surface. [1920 25; < Gk tekt(ós) molten +… …   Universalium

• Tollmann's hypothetical bolide — Alexander Tollmann s bolide, proposed by Kristen Tollmann and Tollmann (1994), is a hypothesis presented by Austrian geologist Dr. Alexander Tollmann, suggesting that one or several bolides (asteroids or comets) struck the Earth at 7640 BCE… …   Wikipedia

• TECTITES — Les tectites (du grec 精兀精礼﨟, «fondu») sont des verres naturels produits par l’impact de gros bolides (météorites, comètes?) sur la surface terrestre. Ce sont donc des «impactites», c’est à dire des roches transformées en verre sous l’action d’un… …   Encyclopédie Universelle

• Comet — This article is about the astronomical object. For other uses, see Comet (disambiguation). Comet Hale– …   Wikipedia

• Maban — or Mabain is a material that is held to be magical in Australian Aboriginal mythology. It is the material from which the Clever Women and Clever Men [ Clever Women and Clever Men is the traditional scholarly euphemism for Shaman employed in the… …   Wikipedia

• Moldavite — from Besednice, Bohemia Moldavite (Czech: Vltavín) is an olive green or dull greenish vitreous substance possibly formed by a meteorite impact. It is one kind of tektite. It was named …   Wikipedia

• Wilkes Land crater — is an informal term that may apply to two separate cases of conjectured giant impact craters hidden beneath the ice cap of Wilkes Land, East Antarctica. These are separated below under the heading Wilkes Land anomaly and Wilkes Land mascon (mass… …   Wikipedia

• Edward John Dunn — (1 November 1844 – 20 April 1937) was an Australian geologist, winner of the 1905 Murchison Medal.Early lifeDunn was born at Bedminster near Bristol, England, the son of Edward Herbert Dunn and his wife Betsy, née Robinson. The family emigrated… …   Wikipedia

• Strewn-fields of tektites — ▪ Table Strewn fields of tektites types names age (millions of years) microtektites Muong Nong splash form australite remarks North American tektites, viz., bediasites (Texas), georgiaites 35.4 X X very low in magnesium, calcium moldavites 14.6 ? …   Universalium

• DUNN, Edward John (1844-1937) — geologist was born at Bristol, England, on 1 November 1844 the son of Edward Herbert Dunn. He arrived in Sydney with his parents in 1849. In 1856 he was living at Beechworth, where he was educated at the Church of England school and later by a… …   Dictionary of Australian Biography