This area was filled with mature gardenias. I dug them out, gave them away, and am turning the area into a gravel pad so that the people who continually complain about having to back out a long unlit driveway at night will stop complaining. Plus, though difficult, it's an interesting project. The lava was just below the surface (I knew that) so it was a matter of stripping off the dirt (which a neighbor hauled away for his yard) to get down to the lava. I want as much dirt as possible out of there, so that nothing will grow up and through the gravel.