The study was conducted on water from the Orange County Water District, which purifies wastewater with a comprehensive process including microfiltration, reverse osmosis, and UV light treatments. That purified water is then injected into a local aquifer. Over an approximately six-month residence time, that purified water accumulated trace amounts of arsenic. Geoscientists were called in to help solve the mystery of its occurrence. Learn the source of the arsenic and how the local geology and water chemistry interacted in the latest story from EARTH Magazine: http://bit. [Read More]

Alexandria, VA - While expanding a reservoir in Snowmass Village, Colorado, workers stumbled upon a big bone. Realizing they found something special, the workers called in the experts at the Denver Museum of Nature & Science (DMNS), who drove several hours to examine the site. Scientists quickly realized that this was no ordinary boneyard. Work on the reservoir halted as DMNS scientists called in dozens of volunteers and experts from around the country to help excavate the site before construction continued. [Read More]

Do mantle plumes exist? EARTH Magazine explores one of the most hotly debated topics within the geoscience community. From the origin of plate tectonic theory to the results of the most recent experiments using techniques like isotope geochemistry and seismic tomography, the results of mantle studies are often contradictory, giving rise to the longstanding debate. It’s not just the lack of clarity in the data that opponents of the mantle plume hypothesis find frustrating, but the fact that plumes are taught as a settled scientific fact about how the planet’s mantle functions, as early as grade school. [Read More]

At the American Geophysical Union Fall Meeting next week, geoscientists will discuss findings from the April 2015 Gorkha Earthquake that devastated Nepal and killed approximately 8,900 people. EARTH Magazine brings you a special feature that describes how initial data informed relief efforts and how a community ranging from mountaineers to geophysicists to engineers is helping Nepal rebuild. EARTH spoke with a mountain climber whose summit plan was cut short by shaking on Annapurna, but whose trip wasn’t wasted: Instead, he and his fellow mountaineers turned into rescuers, coming to the aid of those in need by seeking donations from engaged online social communities, and by hiking from village to village to deliver necessities from aid agencies. [Read More]

Alexandria, VA - The American Geosciences Institute welcomed its 2015-2016 executive committee at the Geological Society of America (GSA) Annual Meeting held last month in Baltimore, Maryland. New officers include: Jean M. Bahr, President-Elect, currently a professor at University of Wisconsin at Madison, and holds degrees from Stanford and Yale. She is a fellow and was the President of GSA from 2009-2010. She currently is an editor of the AGU journal Water Resources Research. [Read More]

The American Geosciences Institute (AGI) and the Center for Geoscience and Society are pleased to extend the celebration of Earth Science Week 2015 with the announcement of a new Visualizing My Earth Challenge. This contest invites full-time secondary and postsecondary students (ages 14 and up) to submit visual representations of natural phenomena from a geoscience perspective. “What if you had a window that showed raindrops magnified 100 times?” the contest guidelines urge students to consider. [Read More]

Alexandria, VA - A new study from geoscience researchers has important implications for studies of Mesoamerica and North America prior to the arrival of European settlers. Using isotope geochemistry, scientists at Pennsylvania’s Dickenson College and the University of Arizona are trying to identify if turquoise mineral specimens record the signature of their parent ore deposits. Turquoise is a copper aluminum phosphate mineral that forms from water percolating through bedrock near copper ore deposits. [Read More]

Alexandria, VA - The American Geosciences Institute (AGI) is pleased to announce the release of “America’s Geologic Heritage: An Invitation to Leadership.” This publication was prepared by the National Park Service’s Geologic Resources Division staff in cooperation with AGI. The book synthesizes recent concepts developed in the global geologic resource conservation community and puts them into context for a uniquely American approach to geologic heritage conservation. Definitions and discussions are provided for important terms such as geologic heritage, geodiversity, and geoconservation. [Read More]

Published on American Geosciences Institute (https://www.americangeosciences.org) As Americans feast for Thanksgiving, scientists are engaged in a debate over what human ancestors feasted on and when it occurred. EARTH Magazine brings readers this active debate centered around fossilized animal bones and the marks on them. Several years ago, scientists discovered 3.4-million-year-old animal bones near Dikika, Ethiopia, that had strange markings on them. Scientists initially reported that the markings were tool marks made by human ancestors who were butchering and eating the protein- and fat-rich animals. [Read More]

Alexandria, VA - Anna Lee of Suwanee, Georgia, won first place in the visual arts contest with a showing colorful connections among Earth systems in her community. Finalists were Akhshitt Swetha Karthikeyan, Nia Maheshwari, and Ava Chang. Students in grades K-5 made two-dimensional illustrations demonstrating the theme “Picturing Earth Systems.” Mary Lide Parker of Chapel Hill, North Carolina, won first place in the photo contest with her image of hiking along a frigid cliffside. [Read More]