There are two ways to remove coal from the ground: surface mining and underground mining. Surface mining is used when a coal seam is relatively close to the surface, usually within 200 feet. The first step in surface mining is to remove and store the soil and rock covering the coal (called the overburden).
Pearl oysters are not closely related to true oysters, being members of a distinct family, the feathered oysters (Pteriidae). Both cultured pearls and natural pearls can be extracted from pearl oysters, though other molluscs, such as the freshwater mussels, also yield pearls of commercial value.
Fresh, delicious, and healthy â our connoisseur-quality Oysters come from the cool, clean waters off Washington state, and are harvested daily. Great oysters need a constant exchange of fresh, clean ocean water. And we found just that â alongâ¦ read more. Great oysters need a constant exchange of fresh, clean ocean water. And we found just that â along with what just might be the best cultured oyster farms in America. Our unique oyster farms offer the best cultured oysters from both the East Coast and West coast can offer! Different locations from the East and West make these oysters as unique as the finest wine. Farm 2 Market is proud to offer with overnight shipping to anywhere in America.