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Cedar (Texas) H4

This thin section was one of a hoard that was deaccessioned by Arizona State University in 2014. My notes from then say “Very large sample. Interesting and busy TS. (Is TS curved/cupped?)” This week I looked closer and found that the glass cover slip is partially detached from the base glass slide, lifting up – and has brought the stone sample up with it! It is still busy and interesting. Here are some photos, maybe the last ever from this slide, all photos after the first two are in cross polarized light.

 

 


Thin section with large sample.

 

 


The cover slip has lifted the cemented sample from the glass slide.

 

 


A variety of textures in this 3 mm wide view.

 

 


A barred olivine chondrule within a larger chondrule. Field of view is 3 mm wide.

 

 


FOV = 3 mm.

 

 


FOV= 3 mm.

 

 


FOV= 3 mm.

 

 


Porphyritic pyroxene chondrule. FOV= 3 mm.

 

 


FOV= 3 mm.

 

 


FOV= 3 mm.

 

 


FOV= 3 mm.

 

 


Radial pyroxene chondrule. FOV= 3 mm.

 

 


FOV= 3 mm.

 

 


FOV= 3 mm.

 

 


Enlarged view of above chondrule. FOV = 0.6 mm.

 

 


Bent bars. FOV = 1.0 mm.

 

 


Barred olivine chondrule 0.4 mm in diameter.

 

 


Granular olivine chondrule 0.35 mm in diameter.

 

 


Barred olivine chondrule 0.2 mm top to bottom.

 

 


Barred olivine chondrule 0.2 mm in diameter.

 

 


Barred olivine chondrule 0.2 mm in diameter.

 

 


Barred olivine chondrule 0.2 mm in diameter.
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