Taxonomy term


Geomedia: Books: Iceland's eruption of biblical proportions explored in 'Island on Fire'

For a few months in 2014–2015, a volcanic eruption in Iceland captivated many people around the world. The Holuhraun lava field produced the largest volume of lava erupted on the North Atlantic island in the past 200 years. Except for the areas plagued with acrid, sulfur-rich gas, which affected air quality, the eruption was mostly harmless and became a tourist spectacle. It was Icelandic volcanism at its finest.
16 Jul 2015

Geomedia: On the Web: Dinologue: A dino blog

Wherever you want to go, the Internet can take you there. Space? No problem. The bottom of the ocean? Sure. Now, you can add another stop to the itinerary: the Mesozoic. A new website,, aims to transport visitors back to the time of the dinosaurs.
05 Jul 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

Energy Notes: December 2013-2014

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

26 Jun 2015

Down to Earth With: Geophysicist Peter Molnar

As a graduate student in geophysics at Columbia University in the late 1960s, Peter Molnar — who had studied physics as an undergraduate — decided to sit in on a geology course for a term. When the professor began discussing cratons one day, Molnar raised his hand and asked what a craton was. Molnar still remembers the strange look he received, as if the professor were wondering, “Who let this guy in?”
20 Jun 2015

Benchmarks: June 1,1840: Setting out for the Copper Country

On the morning of June 1, 1840, Michigan’s first state geologist, Douglass Houghton, stepped onto a small barge about to set sail on Lake Superior. The step marked the beginning of the first geological survey of the Keweenaw Peninsula — the northernmost portion of Michigan’s Upper Peninsula, which juts out into the center of the lake. Houghton and his crew would spend the summer exploring Michigan’s Upper Peninsula and recording the region’s geologic resources, including rich copper deposits known only locally at the time. That would change, however, after Houghton’s team detailed its findings in an 1841 report that spurred the nation’s first major mining boom.

01 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

Geomedia: On the web: Personalizing drought data with digital tools

With drought, people feel the heat while it’s happening, but understanding how current droughts fit into past trends — and what they mean for the future — is harder to grasp. Several online tools are available to help the public and decision-makers make sense of drought data. Viewers can see current and historical droughts superimposed on maps, focusing in on specific locations or broadening the view to larger regional, national or global droughts. 
28 May 2015

Down to Earth With: Marine Geophysicist Maya Tolstoy

Growing up in Scotland, Maya Tolstoy was drawn to the theater, and even briefly considered majoring in the subject in college. Instead, she chose to follow another lifelong passion and became a marine geophysicist.

21 May 2015