Globigerina ooze is composed of
Graptolite belongs to the ----------- phylum.
In an unconformity, the rocks on opposite sides are not parallel, then its is
Joints perpendicular to the axes of folds are common in orogenic belts, such joints are called
Oscillation ripple marks can readily be used to identify whether a bed is right-side-up or
In a fold, the downward-facing beds are