Middlesborough
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Fact sheet
Description: 

The Middlesborough meteorite fell on 14th March 1881 as a single 1.5 kg stone. It landed at Pennyman's siding on the railway about 1.75 miles from Middlesborough in NE England. The impact was witnessed by railwaymen who heard a "rushing" sound followed by a thud. Alexander Herschel later described the hole it made as a round vertical hole into which a man's arm might be thrust. The shape of the meteorite is the result of severe melting and abrasion during its entry into the Earth's atmosphere.

The Middlesborough meteorite is classified as an L6 chondrite, meaning it has a low iron content (5-10%) and indistinct chondrules that have been metamorphosed under conditions capable of homogenising all mineral compositions. Look at moderate magnification in PPL to see chondrules (rounded features) consisting of olivine and pyroxene crystals. Rotation 1 shows a barred olivine chondrule.

See also:
http://www.bimsociety.org/bim1.shtml

http://www.lpi.usra.edu/meteor/metbull.php?code=16632

Specimen: BM54267 (stills are courtesy of GeoEd who make a replica of the meteorite)
Thin section: BM54267

In Place
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Accuracy:
Location precision: 
Good
Timescale:
Timescale: 
Hadean
Ma = Millions of years ago
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meteorite
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