Sarah Shafer
Project Chief
U.S. Geological Survey
3200 SW Jefferson Way
Corvallis, OR 97331, USA
Tel: +1 541.750.7412
Fax: +1 541.758.8806
E-mail: sshafer@usgs.gov
Richard Pelltier
Geographer
U.S. Geological Survey
Box 25046, MS 980
Federal Center
Denver, CO 80225, USA
Tel: +1 303.236.5808
Fax: +1 303.236.5349
E-mail: rtpelltier@usgs.gov