Intervening Obstacle: An intervening obstacle is an environmental or cultural feature that hinders migration. Chain migration: Further migration to a place where friends or relatives have already settled.
INTERVENING OBSTACLES. An intervening obstacle is a environmental or cultural feature that hinders migration. Look at the images and decide how the feature could be an intervening obstacle to migration.
Gneiss. It is a high grade metamorphic rock, having been subjected to higher temperatures and pressures than schist. It is formed by the metamorphosis of granite, or sedimentary rock.
