Taxonomy term

usgs

Mineral Resource of the Month: Lime

Lime is the common term for several chemicals in three major categories: quicklime, hydrated lime and refractory dead-burned dolomite. Lime is almost never found naturally. It is primarily manufactured by burning limestone in kilns, followed by hydration when necessary. 

08 Dec 2015

Energy Notes: May 2014-2015

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

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.
 

08 Dec 2015

Mineral Resource of the Month: Pumice and Pumicite

Pumice is an extrusive igneous volcanic rock formed through the rapid cooling of air-pocketed lava, which results in a low-density, high-porosity rock. Fine-grained pumice, or pumicite, is defined as minute grains, flakes, threads or shards of volcanic glass, with a size finer than 4 millimeters. 

30 Oct 2015

Energy Notes: April 2014-2015

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.

30 Oct 2015

Mineral Resource of the Month: Iodine

Iodine is a bluish-black lustrous solid (violet-colored in its gaseous state) found primarily in seaweed, underground brines associated with petroleum deposits and caliche ore deposits. 

26 Sep 2015

Energy Notes: March 2014-2015

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.

26 Sep 2015

Mineral Resource of the Month: Gemstones

Gemstones have been treasured objects throughout history, often serving as symbols of power and status for rulers and the wealthy. Stones used in early jewelry-making include amber, amethyst, coral, diamond, emerald, garnet, jade, jasper, lapis lazuli, pearl, rock crystal, ruby, serpentine and turquoise. 
 
23 Jul 2015

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

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