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Roll Overs:
#1
#2
#3
#4
#5
#6
#7
#8
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Photos by Bill Mikuska. Copyright (c) Mikuska.
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What is a thin section? What do all the colors mean?
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Thin section with various imaging techniques. CM2
TKW 100 kg. Observed fall 28 September 1969, near Near Murchison, Victoria, Australia.
  
Bill writes:
Photos:
1) Crossed polarizers
2) Crossed polarizers
3) Same view as photo 2 with Crossed polarizers and a full wave retardation plate
4) Crossed polarizers
5) Reflected unpolarized light
6) Same view as photo 5 with Transmitted light, single polarizer
7) Same view as photo 5 with Transmitted light (single polarizer) and reflected light
8) Same view as photo 5 with Crossed polarizers
As a witnessed fall on September 28, 1969, Murchison is classified as a CM2 meteorite with a TKW of 100kg. Besides having specific enantiomeric excesses of some chemical isomers unlike other carbonaceous chondrites, it also has CAI's, free metal, and silicates. Some of the these many faces of Murchison are revealed in the following photomicrographs. Note, even though polarimetry uses polarized light to determine the optical rotation of mixtures and pure chiral compounds, it cannot be determined using the polarized light microscope because of sample requirements ( see: specific rotation). |
Click to view larger photos
#1
#2
#3
#4
#5
#6
#7
#8
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Found at the arrow (green or red) on the map below
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Bill Mikuska
2/26/2018 7:04:25 AM |
Thank you Frank for the correct observation. |
Frank Cressy
2/26/2018 6:56:50 AM |
Very nice! Thanks for sharing. However, it looks like photo 6 is the one with the transmitted and reflected light. Switched with 7? |
Solar Anamnesis
2/26/2018 6:47:19 AM |
cool, great pictures thanks! |
Bernd Pauli
2/26/2018 5:26:56 AM |
Awesome sequence of intriguing photo shots! Thanks for sharing with us! |
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