Rev. E. Hill — Stevn's Klinf, Denmark. 73 



when it advanced against these cliffs? Were the cliffs then safe 

 beneath tlie sea ? Or, was the ice-sheet accommodating and pliable ? 

 The beds are undisturbed. " Facts bein' stubborn and not easy 

 •drove," says Mrs. Gamp. Was Stevn's Klint stubborn ? At any 

 'I'ate, it is a fact. 



A Tongue of Glacial Clay. 



At Rodvig, on the west side of its little port, the top of the Stevn's 

 Klint Chalk is only about eight feet above sea-level. Over it lies 

 eight or ten feet of Glacial Clay. The line between Chalk and 

 Clay was clean and clear, roughly but not perfectly level. At 

 one spot a tongue of clay ran into the chalk, about twelve feet 

 long, not more than three inches at its thickest. Such tongues are 

 often to be seen at such junctions, but this attracted my attention. 

 The cliff faced south ; the point of the tongue was on my right hand, 

 and its connection with the mass of clay on the left ; the tongue 

 therefore entered the chalk from the west. Any ice-sheet at this 

 spot may have been moving from north or east, but no one would 

 imagine a movement from the west. The tongue was not thrust in 

 by an ice-sheet. 



chalk 



Fig. 1. — Tongue of Clay in Clialk. 

 In the clay of this tongue wei-e two or three flints ; one, pear- 

 shaped with a narrow stem-end, had this narrow end imbedded in 

 -the lower surface of the chalk, while its thicker part extended nearly, 

 but not quite, to the top of the clay. It was in situ, but any thrust 

 would have displaced it. So this clay had not been introduced by 

 thrust, neither had any horizontal pressure acted on the flint. 

 The fissure filled with clay may have been made by solution of 

 water percolating along a crack, or by repeated freezing and 

 expanding of water in such a crack, or by some lifting of an attached 

 cake of ice ; but certainly by no horizontal force. 



chalk 



chalk 



Fig. 2. — Middle portion of above, enlarged. 



\_Fiffures represent tracing of diagrams in notebook made on the spot.'] 



It may be worth while to notice carefully such tongues elsewhere, 



dn case some of them may afford evidences of their causes. Here 



the Danish Clay seems to have put out its tongue against a 



Baltic Glacier. 



