@rosborne979,
yes its possible. Those linear features look very much like primary "bedding" layers. There are sedimentary features that volcanic ash makes tht looks like this. I vote for the "Ignimbtite" (ash) theory cause of the "cracks that occur at the bottom. These cracks dont appear to be consistent with bending of the rock, they appear more like linear gas bubbles (called vescicles) If they were cracks associated with bending, theyd go all the way through and never have
sharp ends on both sides of the crack. We use crack features to tell where the original top of bedding occured.
