ANTH 1003 Chapter : Chapter 4 Communication
Document Summary
Mapping the ocean floor: bathymetry, depth was originally measured by lowering weighted lines overboard . Isolated volcanic peaks: may emerge as island, may sink and form flat-topped seamounts called guyots. Crustal deformation and mountain building: mountains, provide vivid evidence of tectonic activity, they represent , uplift, deformation. Mountain belts: mountain frequently occur in elongated, linear belts, mountain are constructed by tectonic plate interactions in a process called orogensis. Mountains are born and have finite lifespan: young mountains are high, steep and growing up, middle-aged mountains are dissected by erosion, old mountains are deeply eroded and often buried. Causes of orogenesis: andean-type subduction zone, continental collisions formation of himalayas tallest mountain in the. Isosfacy and uplift: surface elevation represents a balance between forces, gravitational attraction - pushes plates into mantle, buoyancy attraction causes plate to float higher on a mantle, term isotactic equilibum describes this balance.
