Quartzite is a tough stone composed mostly of quartz. It may be derived from sandstone or from chert by regional metamorphism. (more below). Quartzite forms in two different ways. In the first way, under the pressures and temperatures of deep burial, sandstone or chert recrystallizes resulting in a metamorphic rock.A quartzite in which all traces of the original grains and sedimentary structures are erased may also be called metaquartzite.This Las Vegas boulder is a metaquartzite.more below). Quartzite forms in two different ways. In the first way, under the pressures and temperatures of deep burial, sandstone or chert recrystallizes resulting in a metamorphic rock. A quartzite in which all traces of the original grains and sedimentary structures are erased may also be called metaquartzite.
Chapped lips (also cheilitis simplex or common cheilitis) are characterized by cracking, fissuring, and peeling of the skin of the lips, and are one of the most common types of cheilitis. While both lips may be affected, the lower lip is the most common site.
A cleft lip occurs when there is a split or opening in the lip. This opening can be small or large enough to connect the upper lip and nose. A cleft palate occurs when the roof of the mouth does not close properly during a babyâs early development inside the womb. The palate is made up of two parts, either of which can be cleft â the hard palate and the soft palate. The hard palate is a bony portion in the front of the roof of your mouth.