What happens to meteorites when they pass through the Earth's atmosphere and can any comparisons be drawn with tektites.

ABOVE: A bullet Sikhote Alin. Note the 360 degree radial flow lines. The point from which these flow lines radiate is known as the stagnation point. Anda tektites also appear to have a stagnation point from which the texture radiates.

Different meteorites, composed of different material, behave in different ways. Perhaps the most spectacular oriented meteorites with flow lines are the achondrites. Eucrites such as Millbillillie and Camel Donga are spectacular. Some Martian meteorites also have spectalular flow lines (and a price to match!)

ABOVE:   An oriented NWA meteorite. The posterior surface shows a rollover lip, where melt from the front of the specimen cooled on the on the back. The flanges on Australite buttons formed in a similar manner.

ABOVE:   Regmaglypts developed on an LL Chondrite from NWA.

ABOVE:   Fusion crust showing contraction cracks on an ordinary chondrite from NWA


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