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Current Geochemistry News Events, Discoveries and Articles

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Caltech researchers use stalagmites to study past climate change
There is an old trick for remembering the difference between stalactites and stalagmites in a cave: Stalactites hold tight to the ceiling while stalagmites might one day grow to reach the ceiling. (2012-05-04)

New UF study shows early North Americans lived with extinct giant beasts
A new University of Florida study that determined the age of skeletal remains provides evidence humans reached the Western Hemisphere during the last ice age and lived alongside giant extinct mammals. (2012-05-04)

Old maps and dead clams help solve coastal boulder mystery
Perched atop the sheer coastal cliffs of Ireland's Aran Islands, ridges of giant boulders have puzzled geologists for years. What forces could have torn these rocks from the cliff edges high above sea level and deposited them far inland? (2012-05-01)

Water treatments alone not enough to combat fluorosis in Ethiopia
Increased intake of dietary calcium may be key to addressing widespread dental health problems faced by millions of rural residents in Ethiopia's remote, poverty-stricken Main Rift Valley, according to a new Duke University-led study. (2012-04-27)

Data from MESSENGER spacecraft reveals new insights on planet Mercury
Thanks to the MESSENGER spacecraft, and a mission that took more than 10 years to complete, scientists now have a good picture of the solar system's innermost planet. (2012-03-22)

AGU: Venice hasn't stopped sinking after all
The water flowing through Venice's famous canals laps at buildings a little higher every year - and not only because of a rising sea level. Although previous studies had found that Venice has stabilized, new measurements indicate that the historic city continues to slowly sink, and even to tilt slightly to the east. (2012-03-21)

Hazy shades of life on early Earth
A 'see-sawing' atmosphere over 2.5 billion years ago preceded the oxygenation of our planet and the development of complex life on Earth, a new study has shown. (2012-03-19)

Nationwide Radium Testing of Groundwater Shows Most Susceptible Regions are Central U.S. and East Coast
Groundwater in aquifers on the East Coast and in the Central U.S. has the highest risk of contamination from radium, a naturally occurring radioactive element and known carcinogen. (2012-02-16)

Solutions for a nitrogen-soaked world
Nitrogen is both an essential nutrient and a pollutant, a byproduct of fossil fuel combustion and a fertilizer that feeds billions, a benefit and a hazard, depending on form, location, and quantity. (2012-01-17)

Lava Fingerprinting Reveals Differences Between Hawaii's Twin Volcanoes
Hawaii's main volcano chains--the Loa and Kea trends--have distinct sources of magma and unique plumbing systems connecting them to the Earth's deep mantle, according to UBC research published this week in Nature Geoscience, in conjunction with researchers at the universities of Hawaii and Massachusetts. (2011-11-30)