Crag 

Crags are formed when a glacier or ice sheet passes over 

an area that contains 

formation particular; 

resilient resistant 

rock, oft, granite volcanic plug 

with some other volcanic stuff, it happening thus 

the risen rocky block stands firm, 

while soft surrounds are mowed down 

by means of fierce glacial force of fearsome erosioning 

thus, the rocky block protrudes from the surrounding terrain. 

Frequently the crag serves as shelter which remains as like 

a gradual fan or ridge 

forming a tapered ramp like bridge up the leeward side of crags ('n stuff).