These 
aeolian deposits are most strongly developed on the northern coast, where 
large areas are permanently cut off from the operations of the plough. 
The most considerable of these fronts St. Ives Bay, forming the Lelant, 
Phillack, Upton, Gwithian and Godrevy towans. Another extensive 
tract constitutes the Perran Sands, and isolated patches continue as far as 
Newquay. Further to the north the solid rocks forming the promontory 
of Trevose Head are severed by the towans extending from Constantine 
Bay to Perleze Bay, and opposite Padstow a tract of sandhills extends from 
St. Michael to the Dunbar. Smaller patches occur at Gunwalloe and 
along the southern coast.