Interpreted and Uninterpreted Seismic-Reflection Profiles In HTML Format

Two 21-day field operations were conducted in 1997 and 1998 in the estuaries and on the inner continental shelf off the northern Oregon and southern Washington coast. These cruises aboard the R/V Corliss were run in order to generate reconnaissance maps of the seafloor geology and the shallow subsurface stratigraphy using sidescan sonar and seismic-reflection mapping techniques. The 1998 cruise also collected sediment grab samples, bottom photographs, and video images to verify the sidescan-sonar imagery and to document the seafloor geology. The combination of these data with previously
collected sediment sample data (Robert, 1974; Nittrouer, 1978; and Smith et. al., 1980) has been used to define the extent and lithology of shelf sediments associated with the Columbia River littoral cell. This work is one component of a larger project studying the erosion of the Washington and Oregon coast and is being coordinated by the U.S.
Geological Survey and the Washington State Department of Ecology. The reason for collecting these data is to
provide a regional synthesis of the offshore geology to support a wide variety of management decisions and to
provide a basis for further process-oriented investigations.

For more information on the seismic surveys see http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=1998-014-FA

These data are also available via GeoMapApp (http://www.geomapapp.org/) and Virtual Ocean (http://www.virtualocean.org/) earth science exploration and visualization applications.

1997年与1998年，科研团队在俄勒冈州北部及华盛顿州南部沿岸的河口海域与内陆大陆架区域，开展了两次为期21天的野外作业。本次航次搭载“科利斯号（R/V Corliss）”执行，旨在利用侧扫声呐（sidescan sonar）与地震反射测绘（seismic-reflection mapping）技术，绘制海底地质与浅地下地层的普查测绘图。1998年的航次额外采集了抓斗沉积物样品、海底照片与视频影像，用于验证侧扫声呐成像结果并记录海底地质状况。将本次采集的数据与此前已获取的沉积物样品数据（Robert, 1974；Nittrouer, 1978；Smith et al., 1980）相结合，可明确与哥伦比亚河沿岸输沙单元（Columbia River littoral cell）相关的大陆架沉积物的分布范围与岩性特征。本研究是华盛顿州与俄勒冈州海岸侵蚀大型研究项目的子课题之一，由美国地质调查局（U.S. Geological Survey）与华盛顿州生态部（Washington State Department of Ecology）统筹协调。本次数据采集工作的核心目标，是构建近海地质的区域综合数据集，以支撑各类管理决策，并为后续的过程导向型研究提供基础。

如需了解地震勘探的更多详情，请访问：http://woodshole.er.usgs.gov/operations/ia/public_ds_info.php?fa=1998-014-FA。

本数据集亦可通过GeoMapApp（http://www.geomapapp.org/）与Virtual Ocean（http://www.virtualocean.org/）这两款地球科学探索与可视化应用获取。