They compared prices at Whole Foods stores in half a dozen cities to those at various competing supermarkets to determine which stores were cheaper. They found that Whole Foods is about 15% more expensive than other conventional supermarkets, such as Kroger, Wegmans, and Safeway.
A type of igneous rock. Basalt is the most common rock type in the earth's crust and makes up most of the ocean floor.
The deposits form in deep ocean water by the precipitation of sulfide minerals released by submarine volcanoes. Volcanic fluids and hot seawater move through the volcanic rocks and leach metals. The deposits are associated with lava flows, breccia, water-deposited tuffs, cherts, sulfates, and limestones.eposits of nickel sulfides are mined from greenstone belts in many ancient volcanic terranes. The ore is associated with ultramafic lava flows called komatiites. Komatiites have more than 18 weight % magnesium oxide (MgO) and large amounts of the mineral olivine.