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oil industry

(Encyclopedia) oil industry, the business of discovering oil (petroleum), extracting it from the ground, refining it into a variety of products, and distributing it to the public. The development of…

The Expedition Subdivided

Chapter 23 Chapter 25 The Expedition Subdivided On the third of July, accordingly, Captain Lewis, with nine of his men and five Indians, proceeded down the valley lying between…

Pennsylvania

Pennsylvania State Information Official Name: Commonwealth of Pennsylvania Capital: Harrisburg Organized as a territory: 1681 Entered Union (rank): December 12, 1787 (2nd) Present constitution…

mining

(Encyclopedia) mining, extraction of solid mineral resources from the earth. These resources include ores, which contain commercially valuable amounts of metals, such as iron and aluminum; precious…

Colorado

  Colorado State Information Capital: Denver Official Name: State of Colorado  Organized as a territory/republic: February 28, 1861 Entered Union (rank): August 1, 1876 (38th) Present…

Rocky Mountains

(Encyclopedia) Rocky Mountains, major mountain system of W North America and easternmost belt of the North American cordillera, extending more than 3,000 mi (4,800 km) from central N.Mex. to NW…

asteroid

(Encyclopedia) CE5 The asteroid belt lies between the orbits of Mars and Jupiter. Gaps where no asteroids are found are called Kirkwood gaps. The Trojan asteroids share Jupiter's orbit with the…