pertaining to geological structure; "geomorphological features of the Black Hills"; "morphological features of granite"; "structural effects of folding and faulting of the earth's surface" 
                                                            
                                                     
                        
                                                
                        
                        
                            relating to the physical features on the earth's surface and their formation
                                                            
                                                     
                        
                                                
                        
                        
                            Configuration of landforms, pertaining to geological structure