Subject ASC0003sfm
    The geological magazine, or, Monthly journal of geology.
    [Decade 1]:v. 8 (1871), Page 69 (1871)
    Harvard University, Museum of Comparative Zoology, Ernst Mayr Library
    
      BHL Page 32578348
    
    
Keywords
diagram soil levels rocks harlton hill nodule sand rock sediment layers clay hill direction valley Harlton Hill