A pierced lip is a sore that is open making it easier for infections to set in. Touch as less as possible and when you touch make sure your hands are clean. Most workplaces do not approve of piercing do take that into consideration while getting it done. Do be careful when you eat.
A V-shaped valley forms through a geological process called erosional downcutting in which a strong and fast moving river or stream erodes or cuts a path through rock. A V-shaped valley may also be referred to as a river valley.
Rift Valleys. Introduction. Rift valleys are not caused by erosion but are created by tectonic activity. Grabens are another name for these valleys. Today geologists use the term graben primarily to describe valleys on the continents. The valleys form when continental crust is pulling apart allowing the land to drop down between parallel faults.