Taxonomy term

geology

Sea-level rise could cut off wastewater service to millions in U.S.

Scientists report in a recent study that with just 30 centimeters of sea-level rise, roughly 4 million people in the U.S. could lose access to municipal wastewater services — services that allow three-quarters of America to run the tap and flush the toilet. And with even higher seas, the number goes up.

21 Jun 2018

India's urban areas punch city-shaped holes in fog

Air pollution boosts fog formation in some places, creating whiteouts that can affect air and ground transportation, air quality, and public health. In northern and eastern India, persistent fog often hovers over the Indo-Gangetic Plain, a vast region dotted with several densely populated cities, including Delhi, home to 19 million people. Over some of these cities, however, satellite imagery is revealing large holes in the fog.

21 Jun 2018

Getting there and getting around England

From North America, the cheapest and most convenient access to the Jurassic Coast is via one of London’s major airports. Nonstop service to Heathrow (LHR) and Gatwick (LGW) airports is available from many major U.S. cities.From London, the easiest way to get to (and around) the Jurassic Coast is by renting a vehicle, assuming you’re comfortable driving on the left side of the road. Because Gatwick is located on London’s southern outskirts, it offers the best escape to England’s southern coast from the hustle and bustle of the city. 

18 Jun 2018

Mineral Resource of the Month: Chromium

Although chromium is a metal, it does not occur naturally in metallic form. Chromium can be found in many minerals, but the only economically significant chromium-bearing mineral is chromite. Chromite has been mined from four different deposit types: stratiform chromite, podiform chromite, placer chromite, and laterite deposits. Most of the world’s resources, however, are located in stratiform chromite deposits, such as the Bushveld Complex in South Africa. The economic potential of chromite resources depends on the thickness and continuity of the deposit and on the grade of the ore. Many of the major stratiform chromite deposits also contain economic levels of platinum, palladium, rhodium, osmium, iridium and ruthenium.

13 Jun 2018

Skate eggs found on hydrothermal vents

In July 2016, a team of scientists came upon a surprise 1,660 meters beneath the ocean’s surface near the Galápagos Islands: a clutch of yellow eggs, laid by a Pacific white skate, a cousin of rays and sharks. It was not the eggs themselves that surprised the team, but where they were found: near a volcanic hydrothermal vent. The large number of eggs at the site led the team to suggest that the skate was likely using the vent’s heat to incubate the eggs.

11 Jun 2018

Are diatoms triggering submarine landslides?

Far beneath the ocean’s surface, puzzling deposits from huge submarine landslides can be found amid expanses of nearly flat ocean floor. Without steep terrain, what causes these megaslides? In a new study, scientists who delved into deep-sea drilling records report a potential trigger for one such slide off the coast of northwest Africa: diatom ooze.

07 Jun 2018

Getting there and getting around Idaho

If you’re interested in a trip down the Main Salmon, you have two options: put a trip together yourself, or hire a professional outfitter to take you.

06 Jun 2018

Travels in Geology: Rafting the Salmon River through the Idaho Batholith

Rafting down the Main Salmon River, which courses north and then west across northern Idaho, takes you by Precambrian metamorphics and the granites of the Idaho Batholith. Six to eight days later, your trip concludes as you float past what was once the edge of North America, and over former island arcs sutured onto the continent during the Mesozoic.
06 Jun 2018

Which warm waters boosted Hurricane Harvey?

Last August, Hurricane Harvey walloped Texas, dropping more than 100 centimeters of rain on Houston and nearby areas, and causing more than $125 billion in damage. But almost nobody saw it coming. In the days before Harvey made landfall 60 kilometers east of Corpus Christi, the tropical storm barely registered as a threat, but within 30 hours it escalated from a tropical storm into a Category 4 hurricane. Using data collected before and during the storm, scientists are piecing together how Harvey became so ferocious so fast, an effort that could help scientists better predict which future storms might have similarly rapid intensifications.

30 May 2018

"Greening" stormwater in Philadelphia

When environmental geologist David Wilcots joined Sci-Tek Consultants in 2014, he became involved with the Philadelphia Water Department’s Green Stormwater Infrastructure project. Sci-Tek’s goal was to redesign certain areas of the city’s urban landscape so that “less stormwater goes into the sewage system” and more goes into the ground, explains Wilcots. 

29 May 2018

Pages