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.
It is a dense, dark-colored rock that has small crystals, many too tiny to see. It is rich in magnesium and iron. The oceanic crust, largely made up of basalt is located under the ocean floor. Measuring about 4 miles thick, it is thinner but heavier than its counterpart, the continental crust. Learn more about Layers of the Earth