ABSTRACT

Through graphical comparison of pebble orientation and cross-bedding dip direction it has been shown earlier that elongated pebbles, in general, tend to be arranged transversely to the current direction on the topset and bottomset units having extremely low initial dips. They are arranged longitudinally on the foreset units having greater initial dips.

The above conclusions have been now verified by statistical tests. In all cases excepting one, long axes of elongated pebbles are parallel to the direction of foreset dip of cross-bedding. On topsets and bottomsets, the directions normal to the long axes of pebbles are parallel to the cross-bedding dip direction when tested at 5 percent level of significance. This confirms, in particular, the earlier view that for the paleocurrent interpretation, pebble orientation in the central part of foreset is as dependable as the foreset dip direction.