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Rich April, department of geology, Colgate University, will talk about “Acid Rain: Effects on Surface Water and Forest Ecosystems” at a noon brown bag today.

April is among 11 speakers visiting campus this semester for the Geology Brown Bag Series. The talks are held noon Fridays in Van Wickle Hall room 108. Lunch is provided to students at no cost; others can purchase lunch for $3.

The rest of the schedule:

John Wilson, laboratory coordinator in the Lafayette department of geology and environmental geosciences, will talk about “U/Pb Zircon Ages of Plutons from the Central Appalachians, with Comments on their Regional Tectonic Significance” March 8.

Hilary Wyche ’98 of Nutter, McClennen & Fish, LLP, will speak on “Bridging the Gap: A Geologist’s Introduction to the Law” March 15.

Brad Turner ’97, science department, Upper School, Morristown-Beard School, Morristown, N.J., will present a lecture entitled “From Consulting to Grad School to Teaching, Reflections From a Recent Graduate” April 5.

Charles Ver Straeten, Center for Stratigraphy and Paleontology, New York State Museum, will talk about “Mud, Sand, and Mountains: Looking at Sedimentary Rocks, Seeing Tectonics” April 12.

Greg Herman, New Jersey Department of Environmental Protection, Division of Science, Research & Technology, New Jersey Geological Survey, will present a lecture entitled “Fractured-Bedrock Aquifers of the Newark Basin” April 19.

MaryAnn Malinconico, Lamont-Doherty Earth Observatory, Columbia University, will speak on “Thermal History of the Newark Basin” April 26.

The series began four weeks ago with Paul E. Olsen, professor of earth and environmental sciences at Columbia University, speaking on “Mass Extinctions, Asteroid Impacts, and Giant Volcanic Eruptions — The Beginning and the End of the Age of Dinosaurs.” The next week, Jay Parrish of the Pennsylvania Geological Survey presented a lecture entitled “Employment Opportunities with the Pennsylvania Geological Society.” The following Friday, Alex Gates of the department of geological sciences, Rutgers University, Newark, talked about “Evidence for the Assembly and Break-up of the Supercontinent Rodinia in the Reading Prong.” Last week, Ken Kodama, department of earth and environmental sciences, Lehigh University, spoke on “Paleomagnetic Inclination Shallowing — Implications for Central Asia, Baja British Columbia, and Coastal California Terrains.”

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