I might be way 'off base' ....but I see a knight as being a possibility. The rock is heavily eroded and light and shadow can give misleading 'outlines' . But to the figures left hand side (chest) there appears to be a 'shield' shape with , perhaps part of a cross .....Knight Templer ?  
 
 Regards David
		 
		
		
		
			
		
		
		
		
		
		
		
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