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Fig. 3. This thin section is of the Pedon A2 at the 65- to 95-cm depth (Cry horizon). Several coalescent queras are shown (a) under plane-polarized light, and (b) under cross-polarizers (length of bar: 1 mm). The upper half of micrograph shows a transverse cross-section of queras, whereas the lower half shows a longitudinal cross-section of a quera. (c) Sketch of upper left corner of the above photographs illustrating the components of the queras. (d) Detail of another field in the same thin section showing a transverse section of the quera with the quesparite grains, or quemosaic (QM), infilling the central void, and the decalcified area, or quedecal (QD) (length of bar: 400 µm).
