In early 1992 the transfer of the research vessel CSS Parizeau from British Columbia to the Bedford Institute of Oceanography in Nova Scotia, eastern Canada, offered an opportunity for scientists to squeeze in a few days of surveying in the Southern California Borderland. The joint cruise run by Geological Survey of Canada (GSC) and United States Geological Survey (USGS) scientists collected about 850 line-km of high-quality boomer and sleeve-gun reflection profiles of Hueneme, Mugu and Dume submarine fans, Santa Monica Basin, off southern California (see appendix). Initially, the data collected were used to establish a 3-dimensional seismic-stratigraphic interpretation of sand and mud deposits of the modern Hueneme submarine fan. This was the first time that stratigraphic resolution comparable with outcrops on land was obtained from a modern sandy submarine fan. (Piper et al., 1999).

This dataset became an important background for new seismic-reflection data collected under the Earthquake Hazard Task (the Tierra component of the CABRILLO project), which focused on imaging the fault systems within about 30 km of the heavily populated coastal area of southern California (Normark and Piper, 1998). The data have been used to develop a detailed stratigraphic framework to understand the late Quaternary history of sedimentation and deformation patterns in the California Continental Borderland (Figure 1) (see also OFR 2005-1084). As the CABRILLO project draws to a conclusion, data are being made available through web-based publications such as this one. Because the data have been used to support key USGS program activity, the GSC decided that the data collected on the joint cruise should be made publically available through the USGS; hence this publication.

The following sections present details about collection and processing of the sleeve-gun data, and the trackline locations of the data, from which the reader may view images of the seismic-reflection profiles. Data tables are also provided, from which images (JPEG and TIFF format) and SEG-Y formatted sleeve-gun data can be downloaded.