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Micro Visions

John Kashuba

John Kashuba

John is a natural history enthusiast living in Oregon.

Devitrified Glass

Many chondrules consist of phenocrysts embedded in a glassy mesostasis. Sometimes the interstitial glass will have been annealed to such an extent that it will...

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Oriented Gao Fusion Crust

The Gao-Guenie fall in 1960 produced many oriented stones. I bought this small one from Marcin Cimała and had it thin sectioned.      ...

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Metal in two CL chondrites

At this writing, September 2022, there are five CL, Loongana group, carbonaceous chondrites. All are of petrologic type 3.9 or 4. Metzler et al. defined...

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NWA 13784 CV3-an

NWA 13784 CV3-an was brought to us by Hanno Strufe and Andreas Grünemeyer, described by Ansgar Greshake with oxygen isotopes by Karen Ziegler. It appears...

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Symplectites in Nakhla

The Nakhla meteorite fell in the Nile delta the morning of June 28, 1911. Nakhlites are igneous rocks formed in flows or intrusions on Mars....

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D’Orbigny angrite

Alcide d’Orbigny was a French naturalist who explored South America from 1826 to 1833. The 16.55kg meteorite was found near the Argentine settlement that bears...

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NWA 12692 LL3.00 S3 W2

The 3.00 designation is assigned to chondrites that have experienced the least amount of metamorphism. Few are recognized. In September 2021 there are ten. The...

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New Raymer LL4 Opaques

New Raymer is a metamorphic type 4 so we wouldn’t expect to see dark matrix and sharply defined chondrules. Still, there are opaque areas that...

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Aba Panu L3

The silicates in Aba Panu have been strongly shocked so it is not a particularly pretty meteorite under the microscope in transmitted light, in spite...

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