Gorvon anv Dixon—Curious Water-worn Markings on Rocks. 329 
The figures illustrate some of the varieties of markings which 
may be observed. 
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Fig. 1.—Surface of Sandstone Rock, showing a group of the markings. In the 
upper part of the figure the drift, which covers much of the rock- 
surface, isseen. (From a photograph.) 
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Fie. 2.—Three varieties of the markings drawn on a larger scale. The largest of 
these measures 12, the smaller 44 inches across. (Drawn from casts 
taken in plaster of Paris.) 
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We believe that the markings are water-worn. An exami- 
nation of the neighbouring rocks leads us to believe that the 
surface of the bed on which the marks occur lay immediately 
