The answer is the parent material. Parent material is what occurs on the surface before soil begins to form. This is found in new environments such as after a volcanic activity. Pioneers organisms of an ecosystem and abiotic elements of weathering such as water and temperatures begin to weather the rocks into smaller particles, Humus and organic matter from life accumulate with the minute rock particles to form soil over time. The topmost soil is the most developed and this is why soil has profiles towards the deep into the parent rock material, depending on the stage of weathering. 
 
        
                    
             
        
        
        
So your point doesnt become invalid.
        
                    
             
        
        
        
The correct answer is D: Fault-Block I hope it helps
        
                    
             
        
        
        
At one point in the early history of the earth, all the continents where merged together as a mega continent called "Pangea". so there actually was no ocean between the land, allowing for dinosaurs to roam freely across the entire land mass. when the land masses split up, the fossils went with them :)
        
             
        
        
        
The answer would have to be A.