BSRG Photo Archive

Horizontal Helminthoida Crassa trace River dominated deltaic parasequence. Note the seaward dipping (towards the right) clinoform surfaces within the sandbody. These are termed clinoforms and represent the palaeodelta front. Note that a structural dip of 5° north (towards left of picture) has been removed by rotating the image. Panther Tongue, Book Cliffs Utah. fossils in lower shoreface deposits. Carboniferous of North East England.

photo by John Howell