Crater Lake is one of the two deepest lakes on the North American
continent. Its great depth and the difficulty of transporting bulky
survey equipment to the lake surface make detailed investigation
of features on its floor very awkward. Multi-beam acoustic survey
methods make possible the identification and visualization of small
geologic structures such as faulting, extrusive features, and slumping
which have not been mapped before. Information of this kind will
aid greatly our understanding of both the eruptive processes that
created the caldera and the various processes that have acted to
modify the sides and bottom of the caldera since the time of the
Diagram depicting the use of multi-beam sonar to map
the basin of the ocean. When used in Crater Lake it will take up
to 70 million soundings.
Cooperative project: U.S. Geological Survey, National
Park Service, University of New Hamshire, C&C Technologies Inc.,
and U.S. Army, July/August 2000.
Click here to view or right click to download the
original layout of this information and photos: Mapping
Crater Lake, July 2000 (800 KB JPEG file).