II on a cruise in July, 2004, we mapped and
sampled the seafloor in an area of the Aleutian margin.
Movement of seafloor sediments in the area were thought
by some to be the cause of the 1946 tsunami that caused
appreciable damage in Alaska and Hawaii. Our
mapping efforts revealed no geological features
indicative of the slide predicted by some Tsunami
modelers, making the 1946 tsunami even more mysterious.
We discovered new deep-sea coral habitats methane seeps,
and sampled the mosaic of environments in this
unexplored region. In collaboration with Jon
Martin (Univ. of Florida), we will examine the Sr and
stable isotope signatures of modern and fossil
foraminifera collected on the cruise. We hope to
understand the factors, including disturbance, which
generate seafloor ecosystem mosaic in the submarine
canyon systems. These data will also help further
calibrate faunal and geochemical proxy information from
This project was funded by NOAA's National Undersea Research Program through the West Coast and Polar Regions Undersea Research Center at the University of Alaska Fairbanks (NOAA-NURC). Support for ISU student travel was also provided by an ISU experiential learning grant from the Experiential Learning Committee,and the Office of the Provost and Vice President for Academic Affairs. This project is a collaborative, interdisciplinary effort with a number of researchers, including Lisa Levin, Joris Gieskes and Mike Tryon from Scripps Institution of Oceanography; Jon Martin from the University of Florida; Wiebke Ziebis from the University of Southern California; and Gerard Fryer of the University of Hawaii.