| Subject |
has olivine and low Ca pyroxene homogeneity |
has part feldspar |
has part chondrule |
has structural state of low Ca pyroxene |
has part matrix |
has degree of thermal metamorphism |
has petrologic type |
|---|
| type 4 chondrite | less than 5 % mean deviations | secondary, grains than 2 microns | chondrules well defined | greater than 20 % monoclinic | transparent, recrystallized, small crystals | weak | 4 |
| type 5 chondrite | homogeneous | secondary, 2 to 50 micron grains | chondrules readily delineated | less than 20 % monoclinic | transparent, recrystallized, moderate size crystals | moderate | 5 |
| type 6 chondrite | homogeneous | secondary, grains greater than 50 microns | chondrules poorly defined | orthorhombic | transparent, recrystallized, coarse crystals | strong | 6 |
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