Lamont-Doherty Earth Observatory176
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Scientists Locate Apparent Hydrothermal Vents off Antarctica
Discovery, a First, Could Spur Exploration of Distant Mid-Ocean Ridge
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Some Thoughts about Glaciers Before Heading Home
Mike and I head out today for Cerro Gorra, leaving Jay and Barbara at Lago Cardiel to finish the stratigraphy. What wonderful people; I am so grateful to have had the opportunity to do field work with them. We drive to Lago Argentino, where Mike is meeting a new research team for a separate project.…
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Researchers Probe Bottom Off Port-au-Prince
Scientists are now sailing off the coast of Haiti to assess the recent earthquake there, and the potential for more. This is the latest update, emailed by chief scientist Cecilia McHugh from the research vessel Endeavor. (Read the full story of the project, involving the Earth Institute and other major institutions.) The first part of the science program focused…
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Earthquake Research Vessel Reaches Haiti Coast
Scientists aboard the U.S. research vessel Endeavor and collaborators ashore have just arrived on the coast of Haiti to start a 20-day survey of that will assess the history and potential continued threat of earthquakes there. (Read the full story of the project, involving the Earth Institute and other major institutions.) Chief scientist Cecilia McHugh of Lamont-Doherty Earth Observatory…
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Learning to Be Observant
Last night I made dinner. I’ve never cooked over an open fire—only on a tiny gas-powered stove on backpacking trips–but Jay and Barbara have been teaching me how. Dinner was edible. Jay built the fire last night, but tonight I’m hoping to do the whole thing start to finish. Wish me luck. We left Cerro…
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Building the Best Story You Can
Reconstructing a shoreline history takes skill. Today we’re using altimeters to establish the elevation of Lago Cardiel’s former shorelines. We also continue to look for shells to help us date the lake’s past shorelines, a task that requires strong powers of observation. In one short stretch there might be a dime-sized snail shell almost indistinguishable…
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Searching for Snails
Today we’re looking for live snails so that we can measure how much carbon-14 they are incorporating into their calcite shells. Carbon-14 is a rare isotope of carbon that decays radioactively–organisms incorporate carbon-14 into their tissues and shells while they are alive, and as soon as they die, the carbon-14 starts decaying away. We can…
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Looking at Mud to Learn About Ice Sheets
The bottom of the seafloor shows us where ice used to flow. To pinpoint when the ice retreated, the geologists on board take samples of mud and sand from the seafloor. Using a weighted steel barrel lowered to the seafloor they bore their way through sand and mud. A catcher at the bottom of the…
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Risks and Rewards: funding a technical earthquake response
A rapid technical response to the damaging earthquakes in Malawi produces both humanitarian and scientific benefits, and we hoped that both scientific and international assistance agencies would support our effort. Our seismic field effort serves two purposes: (1) to provide badly needed seismic equipment and technical training to the Malawi Geological Survey department (MGSD); and…