Cross beds can be used to determine paleocurrent directions. such information is of great value in regional stratigraphic study. often, however, cross beds are not fully exposed, and their true attitude must be calculated from data on apparent dip. consider a cross bed in sandstone that is exposed on two vertical nonparallel joint faces. on one face the apparent dip of the cross bed is 100,016°, whereas on the other it is 280,0820 (a) what is the attitude of the cross bed? (b) assume that the current direction is parallel to the true dip direction of the cross bed. what was the orientation of the current direction during deposition of the sandstone? (c) what is the orientation of a joint face on which the apparent dip of the cross bed is the maximum possible value? ene die