ALLENDE STONE METEORITE CV3: BEAUTIFUL CRUST; 296 GR (05/05/2011)...

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ALLENDE STONE METEORITE CV3: BEAUTIFUL CRUST; 296 GRAM

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ALLENDE STONE METEORITE CV3: BEAUTIFUL CRUST; 296 GRAM

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Sold Date: 05/05/2011
Channel: Online Auction
Source: eBay
Category: Natural History

AAA grade specimen!!

ALLENDE INDIVIDUAL with Nature crust!

Beautiful Fresh Looking nature crust!!

From old collection!!

This beautiful specimen weights 296.1 gram!

Measures 72 mm x 72 mm x 35 mm!

The Allende meteorite is the largest carbonaceous chondrite ever found on Earth . The fireball was witnessed at 1:05 a.m. on February 8, 1969, falling over the Mexican state of Chihuahua . After breaking up in the atmosphere , an extensive search for pieces was conducted and it is often described as "the best-studied meteorite in history". The Allende meteorite is notable for possessing abundant, large calcium-aluminium-rich inclusions , which are among the oldest objects formed in the Solar System .

The original stone is believed to have been approximately the size of an automobile traveling towards the Earth at more than 10 miles per second. The fall occurred in the early morning hours of February 8, 1969. At 1:05 a.m., a huge, brilliant fireball approached from the southwest and lit the sky and ground for hundreds of miles. It exploded and broke up to produce thousands of fusion crusted individuals. This is typical of falls of large stones through the atmosphere and is due to the sudden braking effect of air resistance. The fall took place in northern Mexico, near the village of Pueblito de Allende in the state of Chihuahua. Allende stones became one of the most widely distributed meteorites and provided a large amount of material to study, far more than all of the previously known carbonaceous chondrite falls combined.

Allende is often called "the best-studied meteorite in history." There are several reasons for this: Allende fell in early 1969, just months before the Apollo program was to return the first moon rocks. This was a time of great excitement and energy among planetary scientists. The field was attracting many new workers and laboratories were being improved. As a result, the scientific community was immediately ready to study the new meteorite. A number of museums launched expeditions to Mexico to collect samples, including the Smithsonian Institution and together they collected hundreds of kilograms of material with CAIs . The CAIs are billions of years old, and help to determine the age of the solar system. The CAIs had very unusual isotopic compositions, with many being distinct from the Earth, Moon and other meteorites for a wide variety of isotopes. These "isotope anomalies" contain evidence for processes that occurred in other stars before the solar system formed.