io SEASIDE TREES AND SHRUBS 



As CHECKING EROSION OF THE CLIFFS 



Marine erosion is often, and probably on no 

 coast-line more than that of Yorkshire, of a very 

 extensive and serious nature. Landslips are of 

 frequent occurrence, and occasionally very con- 

 siderable, especially in those places where the 

 soil is somewhat loose in character, and where 

 the elevations are high on the immediate sea 

 front. 



The rate of marine erosion depends upon 

 three main factors: (i) The efficiency of the 

 waves during storm ; (2) the nature and resistance 

 of the land ; (3) the percolation of water through 

 the soil resulting from land - springs or from 

 soakage. 



The loss of land has been carefully watched 

 and measured, during the past half-century, along 

 that part of the Yorkshire coast immediately 

 south of Bridlington. This is composed mainly 

 of loose sands and heavy clays, and it has been 

 found that the land is being washed away at an 

 average rate of nearly i\ yards per annum. That 

 this is not of recent notice is a matter of common 

 knowledge, for it is well known that such towns 

 and villages as Ravenspur, Auburn, Hartburn, 

 and Hyde, which about the time of the Norman 

 Conquest occupied important positions on the 

 coast, have since been washed away, and that 



