264 Encyclopedia of the Solar System
(a) (b)(c)FIGURE 12 Petrographic (2.5-mm-wide) thin sections in polarized transmitted light. Partial large chondrules are obvious in the
H3 chondrite Sharps (a) but barely recognizable in the H6 chondrite Kernouve (b); Nakhla (c) is of martian origin. (Photos
courtesy of Dr. Robert Hutchison, Natural History Museum, London.)