Fig. 18

Close-up on the clast in Fig. 17, showing the bottom of one bed (upper left) with a sharp contact with the top of the succeeding bed (lower right). The mineralogy of the clast is mainly olivine, with Fe-rich olivine being lighter in shade. The highest concentration of light gray, Fe-rich olivine is at the bottom of the bed. Insert image at lower left is a lower mag view of the same area, with the high mag area at the lower left of the insert. Note that the grain size extends down to the micron scale