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 most common extrusive igneous rock is basalt, a rock that is especially common below the oceans (Figure 4.15). Figure 4.13: Extrusive igneous rocks form after lava cools above the surface. The lave spills out from the Earth at a volcano.Figure 4.14: Obsidian is an extrusive igneous rock.It cools so rapidly that crystals do not form, and it has a glassy texture. Figure 4.15: These are examples of basalt below the South Pacific Ocean. Basalt is an extrusive igneous rock common below the oceans, though it is also found in some places on continents.igure 4.14: Obsidian is an extrusive igneous rock. It cools so rapidly that crystals do not form, and it has a glassy texture. Figure 4.15: These are examples of basalt below the South Pacific Ocean. Basalt is an extrusive igneous rock common below the oceans, though it is also found in some places on continents.