rivers - interlocking spurs

interlocking spurs

• 
• found in the upper course, these are basically alternating hills leading into a river.
• they occur when a river hits a layer of hard rock and tries to find the easiest route around this hard rock. so the river will be deflected one way or another and will continue on that path until it reaches soft rock. then the river will head straight downhill until it reaches more hard rock,ect. ect.