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Glacial Deposits.indd - Department of Geography - Geology - Illinois ...

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GLACIAL DEPOSITS<br />

Volume 38<br />

2009-2010<br />

<strong>Department</strong> <strong>of</strong> <strong>Geography</strong>-<strong>Geology</strong><br />

<strong>Illinois</strong> State University<br />

Campus Box 4400<br />

Normal IL 61790-4400<br />

Homepage: www.geo.ilstu.edu<br />

Editor<br />

Michael D. Sublett<br />

Graphics<br />

Jill Freund Thomas<br />

Associate Editor<br />

David H. Malone<br />

Cover: EarthScope features networks <strong>of</strong> sophisticated and carefully positioned seismic sensing devices<br />

that report automatically and frequently to data collection points via satellite telemetry. <strong>Illinois</strong> is in the<br />

path <strong>of</strong> an invasion by the brown dots, which represent positions, on a 75 kilometer grid, <strong>of</strong> the USArray.<br />

Some <strong>of</strong> the rolling array’s traveling seismometers will reside in <strong>Illinois</strong> for two years, beginning in 2011.<br />

The dot in <strong>Illinois</strong> underneath the name <strong>of</strong> the state is the location <strong>of</strong> HDIL, the broad band seismometer<br />

near Hopedale that Skip Nelson championed and now monitors. It is part <strong>of</strong> a 350 kilometer grid and will<br />

remain after the traveling array finally reaches the Atlantic and moves north to Alaska. For more<br />

information on all aspects <strong>of</strong> EarthScope, which is a program <strong>of</strong> the National Science Foundation, see<br />

www.earthscope.org. We thank EarthScope <strong>of</strong>ficials for allowing us to use the map and Press Technician<br />

David Blair at Printing Services for assistance with the cover.

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