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NWA 2833 L3.8

 

All the photos that follow were taken of this single thin section.

 

Reflected light.

 

 

Transmitted cross-polarized light.

 

 

The bright rim is evidence of aqueous alteration. Plane polarized light.

 

 

The bright rim is evidence of aqueous alteration. PPL.

 

 

Altered rim. PPL.

 

 

Altered rim with small craters. PPL.

 

 

Interesting fine crystallization pattern. PPL.

 

 

Interesting fine crystallization pattern. XPL.

 

 

Closer. XPL.

 

 

Yet closer. XPL.

 

 

Cryptocrystalline chondrule in XPL.

 

 

Radial pyroxene chondrule with cratered rim. XPL.

 

 

Four millimeter long chondrule fragment from near the center of the slide. XPL.

 

 

Large compound chondrule with embedded barred olivine chondrule. XPL.

 

 

Large compound chondrule with embedded barred olivine chondrule in optical extinction. XPL.

 

 

“Hazy” relict mineral grain. XPL.

 

 

Chondrule containing relict grains. XPL.

 

 

Aggregate of relict mineral grains. XPL.

 

 

Fine grained olivine aggregate. XPL.

 

 

Fine grained olivine aggregate about 0.5mm long. XPL.

 

Below are several more features in this thin section, all in cross-polarized light with field of view about 3mm wide.

 

 

 

 

 

 

 

 

 

 

John Kashuba

John Kashuba

John is a natural history enthusiast living in Oregon.
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