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Topic: Murchison meteorite

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	Meteors and Meteorites
		The differentiated meteorites, including the irons and stony-irons, appear to be fragments of larger bodies for which separation according to density took place while they were in the molten state after formation.
		The vast majority of meteorites are thought to come from the asteroid belt, but a number have been identified as coming from either the Moon or Mars.
		The Allende meteorite is named for the town in Mexico where it fell in 1969, the same year as another famous meteorite, the Murchison meteorite.
	hyperphysics.phy-astr.gsu.edu /hbase/solar/meteor.html (701 words)

	Murchison - Wikipedia, the free encyclopedia
		Murchison is the name of a town on the west coast of New Zealand's South Island.
		Murchison Mountains, a range of mountains in the South Island of New Zealand.
		Murchison Glacier, in the South Island of New Zealand.
	en.wikipedia.org /wiki/Murchison (231 words)

	Orgueil meteorite
		The research team then compared their results with three other meteorites: Murchison and Murray, which have been studied extensively, and Ivuna, a meteorite that fell in Tanzania, Africa, in 1938, that had not been analyzed for amino acids.
		Murchison and Murray are widely believed to be pieces of an asteroid, as are virtually all meteorites scientists have studied.
		However, as in the case of other claims regarding extraterrestrial fossils aboard meteorites, this new piece of evidence is unlikely to be readily accepted by the scientific establishment until it can be rigorously shown that (a) the remains admit no non-biological interpretation, and (b) the possibility of terrestrial contamination can be absolutely ruled out.
	www.daviddarling.info /encyclopedia/O/Orgueil.html (1066 words)

	Murchison's Amino Acids: Tainted Evidence? :: Astrobiology Magazine - earth science - evolution distribution Origin of ...
		If organic compounds such as amino acids from Earth's biosphere have penetrated meteorite samples, they would no longer be representative of early solar system chemistry, nor could they provide evidence of an extraterrestrial source for the components of Earth's first life.
		The Murchison meteorite, which fell about 100 kilometers (about 60 miles) north of Melbourne, Australia, in 1969, is one of the world's most closely studied carbonaceous chondrites.
		On the one hand, says Cody, "the only evidence of the prebiotic world is carbonaceous meteorites, and remarkably, they appear to have a slight [left-handed] enhancement." On the other hand, he points out, that this may not tell us anything about how the almost complete dominance of left-handed forms in terrestrial life got its start.
	www.astrobio.net /news/modules.php?op=modload&name=News&file=article&sid=375 (1863 words)

	The Murchison Meteorite (Site not responding. Last check: 2007-11-03)
		The mix of amino acids found in the Murchison meteorite was found to be very similar to that produced in Miller-Urey type experiments, including many amino acids unknown from terrestrial biological sources.
		The Murchison meteorite was not the first of its type, but the circumstances and timing of its fall led to it being by far the most important.
		The initial work on amino acids in Murchison was done in the laboratories of NASA Ames research center, and led to the first convincing evidence of amino acids of extraterrestrial origin.
	www.ast.cam.ac.uk /AAO/local/www/jab/astrobiology/murchison.html (359 words)

	Fusion Crust
		During meteorite fall in the Earth atmosphere the edge areas of the meteorite body are heated and remelted due to the air friction.
		Magnetic screening of the edge area related to Murchison meteorite indicates that at least 6 mm thick layer is affected by terrestrial TRM acquisition during the entry and landing.
		The thermal shock during meteorite fall threw the atmosphere play important role in the sample history and its influence onto magnetic record is evident.
	www.volny.cz /tomkohout/meteo/Murchison.htm (264 words)

	EPS 102: Meteorites Lecture
		The Allende and Murchison Falls both produced large amounts >2000 kg and >100 kg, respectively, of carbonaceous chondrites for study.
		Murchison fell on September 28 of the same year, 1969.
		Meteorites possess elemental abundances that closely match the Sun's photosphere.
	eps.berkeley.edu /cig/depaolo/eps102/PPT4_Meteorites.html (190 words)

	SPACE.com -- Fantastic Meteorite Falls: The Rocks Scientists Thank Most
		While every meteorite is important, the most significant finds are usually the samples that are found shortly after landing on Earth and quickly analyzed in a laboratory.
		Murchison delivered the first evidence that amino acids - the building blocks of proteins and of life - exist elsewhere in the solar system.
		In 1983, an analysis of gas trapped in glass crystals of an antarctic meteorite found the gas to be identical to the composition of the martian atmosphere, which the Viking spacecraft measured in the mid 1970s.
	www.space.com /scienceastronomy/solarsystem/meteorites-history.html (676 words)

	Murchison Meteorite \| World of Earth Science
		The Murchison meteorite was a meteorite that entered Earth's atmosphere in September, 1969.
		In particular, it was the discovery of amino acids and the percentages of the differing types of amino acids found in the meteorite (e.g., the number of left handed amino acids vs. right handed amino acids), that made plausible the apparent evidence of extraterrestrial organic processes as opposed to biological contamination by terrestrial sources.
		In fact, the proportions of the amino acids found in the Murchison meteorite approximated the proportions proposed to exist in the primitive atmosphere modeled in the Miller-Urey experiment.
	www.bookrags.com /research/murchison-meteorite-woes-02 (482 words)

	The Murchison Meteorite
		The mix of amino acids found in the Murchison meteorite was found to be very similar to that produced in Miller-Urey type experiments, including many amino acids unknown from terrestrial biological sources.
		The Murchison meteorite was not the first of its type, but the circumstances and timing of its fall led to it being by far the most important.
		The initial work on amino acids in Murchison was done in the laboratories of NASA Ames research center, and led to the first convincing evidence of amino acids of extraterrestrial origin.
	www.aao.gov.au /local/www/jab/astrobiology/murchison.html (359 words)

	Murchison meteorite
		A carbonaceous chondrite which exploded into fragments over the town of Murchison, approx.
		The meteorite also contained hydrocarbons which appeared abiogenic in character and was enriched with a heavy isotope of carbon, confirming the extraterrestrial origin of its organics.
		Initial studies suggested that the amino acids in the Murchison meteorite showed no bias between left- and right-handed forms.
	www.daviddarling.info /encyclopedia/M/Murchison.html (297 words)

	Carbonaceous chondrite - Wikipedia, the free encyclopedia
		A carbonaceous chondrite or a C-type chondrite is a type of chondritic meteorite which contains high levels of water and organic compounds, representing only a small proportion (~5%) of known meteorites.
		Their bulk composition is mainly silicates, oxides and sulfides, whilst the minerals olivine and serpentine are characteristic.
		This group, named after the Ivuna meteorite, are considered the least altered of all carbonaceous chondrites.
	en.wikipedia.org /wiki/Carbonaceous_chondrite (408 words)

	extremophiles from space (Site not responding. Last check: 2007-11-03)
		This meteorite is very important because it one of the 12 known meteorites on Earth (called SNC meteorites) that the experts agree came from the planet Mars.
		Calculations based on estimates from eyewitnesses to the Murchison fall, and from what we know aot other meteors and asteroids, suggest its source is in an orbit ranging from 0.992-1.002 AU (astronomical unit, the distance from Earth to Sun) at its low point, to about 3 AU at its high point.
		Murchison is one of the most heterogeneous of all rocks and contains small rounded objects known as chondrules, tiny blue and green crystals of spinel and oliving, orange globules of carbonates and chromite, lath-like crystals of serpentine, etc., all imbedded in a coal fl stone, the signature of a carbonaceous chondrite.
	spacescience.com /newhome/headlines/vostok_pix/hoover.htm (1959 words)

	NAI: News Stories
		Scientists have conducted an organic analysis of the Tagish Lake meteorite, a rare, carbon-rich meteorite classified as a carbonaceous chondrite.
		The meteorite fell on a frozen Canadian lake in January 2000, and is the most pristine carbonaceous chondrite specimen ever studied.
		For example, the Murchison meteorite, a carbonaceous chondrite found in Australia in 1969, contains numerous amino acids and a variety of other organic compounds that are the building blocks for life.
	nai.nasa.gov /news_stories/news_detail.cfm?ID=233 (894 words)

	PSRD: First Rock in the Solar System
		In these meteorites can be found many of the very same minerals predicted to form from a gas of solar composition.
		We have found, in the Murchison carbonaceous chondrite, a refractory inclusion that consists of corundum, hibonite, and perovskite - it is perhaps one of the first rocks to form in the history of the solar system, even older than the Earth, the Moon, and all the planets.
		Murchison hibonite has a sky blue color, so hibonite-rich inclusions can be readily identified.
	www.psrd.hawaii.edu /Oct02/firstRock.html (1362 words)

	Meteor P.10a
		The Meteoritical Bulletin 85, 2001, provides a good account of this fall: After a bright fireball was observed in the Czech Republic, Poland, and Slovakia, and a sonic boom was heard in northern Morovia, a 214 gram stone passed through a Spruce tree and was collected from a garden.
		Numerous pieces of this meteorite were distributed to local inhabitants and the main mass is in the Swiss Meteorite Lab.
		Murchison is a carbonaceous chondrite of the Mighei group, hence its designation as a CM2.
	www.schoolersinc.com /meteorites_p_10a.htm (1011 words)

	Murchison
		The Murchison meteorite fall occurred on September 28, 1969 over Murchison, Australia.
		Classified as a carbonaceous chondrite, type II (CM2), this meteorite is of possible cometary origin due to its high water content of 12%.
		Murchison, like all carbonaceous chondrites, is of a very primitive nature.
	www.meteorlab.com /METEORLAB2001dev/murchy.htm (116 words)

	Found A Meteorite? (Meteorite Identification Information & Help) - Meteorites Australia
		When a meteorite is sliced or broken, the exposed interior surface is often referred to as the "matrix".
		Sometimes in weathered or broken meteorites, the chondrules may be exposed and evident on the surface.
		All verified meteorites require extensive testing and study from an approved institution to be formally classified and approved as such.
	www.meteorites.com.au /found.html (1511 words)

	Meteorite Book
		Because of this carbon-bearing matter, these meteorites are probably the most important type of meteorite for research, a genealogical root of the tree of life.
		CI1 denotes that the meteorite is the most primitive in terms of volatile/elemental retention (the highest known degree of primitivism) and is the most aqueously altered.
		Most CI1 meteorites contain elements in nearly the same abundances as in the sun, which means that they have not lost or gained anything since they were formed in the earliest stages of the solar system.
	www4.nau.edu /meteorite/Meteorite/Book-CarbChondrites.html (750 words)

	Sensations out of the meteorite world
		The Mars meteorite of Nakhla, that fell in 1911 in Egypt in several pieces on Earth, from the beginning produced in the press more fuss by the fact, that one of its fragments killed a dog than by the later discovery, that it is a fragment from our red neighbour planet!
		In the Murchison meteorite one found not only over 10% bound water, but rather also complex hydrocarbons and the constituents of all life: amino acids.
		And it was a meteorite, that brought this shocking possibility into the area of probability and made the president of the USA, Bill Clinton, at a public speech in august 1996 think about the possibility of life on our neighbour planet Mars.
	www.haberer-meteorite.de /english/Sensations.htm (1407 words)

	Rocky Mountain College \| Chemistry at Rocky
		Jingdong Mao, assistant professor of chemistry, is studying a piece of the Murchison Meteorite that hit Earth in Australia in 1969.
		The meteorite is considered one of the most important extraterrestrial rocks because it was retrieved soon after it fell, minimizing contamination from earthly substances.
		Meteorites that come to Earth are the easiest way of getting nonearthly material to study, he said.
	www.rocky.edu /index.php?type=chemistry&ct=meteorite (610 words)

	The Montréal Planetarium — What's Up — Meteorites, Messengers from Space
		Circumstances: It was a Sunday morning, and most of the residents of Murchison were on their way to church when the fireball crossed the sky.
		This odd odour was caused by hydrocarbons, and it revealed the presence of organic material in the meteorite.
		This high proportion of hydrated minerals may indicate that the meteorite is debris from the nucleus of a comet.
	www.planetarium.montreal.qc.ca /Information/Expo_Meteorites/Vedettes/murchison_a.html (499 words)

	Russians Discover Fossilized Life in Meteorites
		Murchison meteorite: branched bacteriomorphic structure anologous to cyanobacteria of the genus Mustigocladus, which are characterized by branching and different diameters of cells --
		Their coccoid cells grow in the form of microcolonies 6-10 micrometers in size, which, in turn, are united in macrocolonies 30-35+ micrometers in size.
		The identity of matter from which various objects of the solar system (planets, asteroids, meteorites, etc.) consist and their close (on geological scale) age are also evidence in favor of the united biological world of the solar system.
	www.rense.com /ufo6/foss.htm (609 words)

	Far News: Australian Meteorite Yields Fossil Evidence
		Murchison resident for 28 years, Anne Finlay said she was excited evidence of alien life may have been found in the meteorite.
		Mrs Finlay, a member of the local historical society, said the meteorite was a vital part of the town's history.
		He said the Murchison meteorite was quickly picked up in chunks by scientists and placed in a curated collection to reduce contamination.
	www.100megsfree4.com /farshores/nmetfoss.htm (576 words)

	Carbonaceous Chondrite / CM2 / Murchison
		Murchison fell on 28 September in an area of over 5 square mile.
		Classified as a carbonaceous chondrite, type II (CM2), this meteorite was suspected to be of cometary origin due to its high water content of 12%.
		An abundance of amino acids found within this meteorite has led to intense study by researchers as to its origins.
	www.meteorites.tv /contents/en-us/d49.html (103 words)

	Meteorite.fr - Classification - Stony Meteorites - Carbonaceous Chondrites
		The well-studied meteorite of Murchison, a CM2 that fell in Australia in 1969, was found to contain more than 230 different amino acids, whereas on earth only 20 different amino acids are known and used as fundamental building blocks of life.
		In a dark-grey matrix of mainly iron-rich olivine, the meteorites of the CV group exhibit large, well-defined chondrules that are made of magnesium-rich olivine, often surrounded by iron sulfide.
		On the other hand the meteorites of the CR clan don't show too many signs of an impact history such as brecciation, shock-veins etc. so that they might have been derived from much smaller parent bodies which aren't to be identified that easily.
	www.meteorite.fr /en/classification/carbonaceous.htm (2962 words)

	Mr. Clemens' Meteorites
		This meteorite is called Canyon Diablo is a 464 gram (1.015 pound) iron coarse octahedrite found in Coconino County, Arizona.
		Meteorites are what hits the ground, a meteor is still in the sky.
		The fusion crust on the specimen evidence of intense heating and melting of the thin outer layer of the meteorite.
	www.lz95.lake.k12.il.us /msn/faculty/jclemens/meteorites.htm (696 words)

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