Taxonomy term

usgs

Energy Notes: January 2014-2015

U.S. Oil & Petroleum Imports (million of barrels per day)

23 Jul 2015

Energy Notes: December 2013-2014

U.S. Oil & Petroleum Imports (million of barrels per day)

26 Jun 2015

Mineral Resource of the Month: Gold

Gold was highly valued by early civilizations for its scarcity, durability and characteristic color, reminiscent of the sun, which was worshiped by some as a deity. It was first recovered from streambed gravels (placers), where it occurred in native form, and thus did not require extraction from ores. It was both essentially indestructible and easily worked. Gold nuggets were prized possessions that could be fashioned into bars of different standard weights and into ornaments and items of adornment that also served as portable wealth. Gold leaf (gold beaten into thin sheets) has been used to decorate significant architectural structures since ancient times. In the 7th century B.C., the Etruscans used gold to make false teeth, and it is still used in dentistry today due to its nontoxicity, durability and beauty.

26 Jun 2015

Mineral Resource of the Month: Iron oxide pigments

Iron oxide pigments, natural or synthetic, are inorganic materials commonly used as coloring agents. They are valued for their resistance to color-change (especially from exposure to sunlight), chemical resistance, stability under ambient environmental conditions, nontoxicity and relatively low cost.

 
29 May 2015

Energy Notes: October 2013-2014

Oil and petroleum imports data are preliminary numbers taken from the American Petroleum Institute’s Monthly Statistical Report. For more information visit www.api.org.

 
18 May 2015

Mineral Resource of the Month: Graphite

Graphite is one of four natural forms of crystalline carbon, along with carbon nanotubes, diamonds and fullerenes. It is gray to black in color, opaque and usually has a metallic luster, although it sometimes exhibits a dull earthy luster. Graphite is soft, flexible, low-density, chemically inert and highly refractory. It is the most electrically and thermally conductive of the nonmetals. 

 
12 May 2015

Down to Earth With: The USGS Landslide Response Team

Over the last year and a half, the Western U.S. has suffered a rash of devastating landslides. The streak began in September 2013, when heavy rains triggered widespread debris flows across the Colorado Front Range. Then came the tragic landslide that buried Oso, Wash., killing 43 people. Two months later, the West Salt Creek slide, a behemoth rock avalanche in western Colorado, killed three people as it barreled down a 5-kilometer-long path.

21 Mar 2015

Mineral Resource of the Month: Silver

Silver, one of the eight precious or noble metals, has been used extensively throughout recorded history for various medical purposes, ornaments and utensils, and for its intrinsic value as the basis for trade and monetary systems. Silver has played a significant role in world history, financing a Greek victory over the Persians in 480 B.C., helping Spain become a world power in the 16th and 17th centuries, and helping fund the Union forces during the U.S. Civil War, to give a few examples.

22 Feb 2015

Mineral Resource of the Month: Antimony

Antimony is a lustrous silvery-white semimetal or metalloid. Archaeological and historical studies indicate that antimony and its mineral sulfides have been used by humans for at least six millennia. The alchemist Basil Valentine is sometimes credited with “discovering” the element; he described the extraction of metallic antimony from stibnite in his treatise “The Triumphal Chariot of Antimony,” published sometime between 1350 and 1600. In the early 18th century, Jöns Jakob Berzelius chose the periodic symbol for antimony (Sb) based on stibium, which is the Latin name for stibnite.

18 Jan 2015

Mineral Resource of the Month: Strontium

Strontium occurs commonly in nature, ranking as the 15th most abundant chemical element on Earth. Only two minerals contain sufficient strontium, however, to be used commercially to produce strontium compounds: Strontianite (strontium carbonate) has a higher strontium content, but celestite (strontium sulfate) is by far the most abundant strontium mineral.

24 Dec 2014

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