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.
Beneath the oceans we find a crust that is on average 7 kilometers thick and composed mainly of basalt. Oceanic crust also has a density of about 3.0 grams per cubic centimeter. The continent's are composed of mainly granitic rock whose thickness varies between 10 and 70 kilometers.