Folds--Offshore of Santa Barbara, California

This part of SIM 3281 presents data for folds for the geologic and geomorphic map (see sheet 10, SIM 3281) of the Offshore of Santa Barbara map area, California. The vector data file is included in "Folds_OffshoreSantaBarbara.zip," which is accessible from http://pubs.usgs.gov/ds/781/OffshoreSantaBarbara/data_catalog_OffshoreSantaBarbara.html. This map area lies within the Western Transverse Ranges geologic province, which is north of the California Continental Borderland (Fisher and others, 2009). This province has undergone significant north-south compression since the Miocene, and recent GPS data suggest north-south shortening of about 6 mm/yr (Larson and Webb, 1992). The active, east-west-striking Pitas Point Fault (a broad zone that includes south-dipping reverse faults), Red Mountain Fault, and Rincon Creek Fault are some of the structures on which this shortening occurs (see, for example, Jackson and Yeats, 1982; Sorlien and others, 2000; Fisher and others, 2009). This fault system, in aggregate, extends for about 100 km through the Ventura and Santa Barbara Basins and represents an important earthquake hazard (see, for example, Fisher and others, 2009). References Cited: Fisher, M.A., Sorlien, C.C., and Sliter, R.W., 2009, Potential earthquake faults offshore southern California from the eastern Santa Barbara channel to Dana Point, in Lee, H.J., and Normark, W.R., eds., Earth science in the urban ocean--The Southern California Continental Borderland: Geological Society of America Special Paper 454, p. 271-290. Jackson, P.A., and Yeats, R.S., 1982, Structural evolution of Carpinteria basin, western Transverse Ranges, California: American Association of Petroleum Geologists Bulletin, v. 66, p. 805-829. Larson, K.M., and Webb, F.H., 1992, Deformation in the Santa Barbara Channel from GPS measurements 1987-1991: Geophysical News Letters, v. 19, p. 1,491-1,494. Sorlien, C.C., Gratier, J.P., Luyendyk, B.P., Hornafius, J.S., and Hopps, T.E., 2000, Map restoration of folded and faulted late Cenozoic strata across the Oak Ridge fault, onshore and offshore Ventura basin, California: Geological Society of America Bulletin, v. 112, p. 1,080-1,090.本数据集SIM 3281的此部分提供了加利福尼亚州圣巴巴拉近海制图区地质与地貌图（详见SIM 3281第10图幅）的褶皱相关数据。矢量数据文件包含于"Folds_OffshoreSantaBarbara.zip"压缩包中，可通过http://pubs.usgs.gov/ds/781/OffshoreSantaBarbara/data_catalog_OffshoreSantaBarbara.html获取。 该制图区坐落于加利福尼亚大陆边缘海盆以北的西横断山脉地质省（Western Transverse Ranges geologic province）（Fisher等，2009）。该地质省自中新世以来经历了显著的南北向挤压作用，近期全球定位系统（GPS）数据显示其南北向缩短速率约为6 mm/年（Larson与Webb，1992）。本次构造缩短作用赋存于一系列活动构造之上，其中包括近东西向展布的皮塔斯点断裂带（Pitas Point Fault，一个包含南倾逆冲断层的宽阔断裂带）、红山断裂带（Red Mountain Fault）以及林孔溪断裂带（Rincon Creek Fault）（详见Jackson与Yeats，1982；Sorlien等，2000；Fisher等，2009）。该断裂系统整体沿文图拉盆地与圣巴巴拉盆地延伸约100 km，是重要的地震灾害源（详见Fisher等，2009）。 参考文献： Fisher, M.A.、Sorlien, C.C.与Sliter, R.W.，2009，《从圣巴巴拉海峡东部到达纳角的南加州近海潜在地震断层》，收录于Lee, H.J.及Normark, W.R.主编的《城市海洋中的地球科学——南加州大陆边缘海盆》，美国地质学会特刊454，第271-290页。 Jackson, P.A.与Yeats, R.S.，1982，《加利福尼亚州西横断山脉卡平特里亚盆地的构造演化》，《美国石油地质学家协会会刊》，第66卷，第805-829页。 Larson, K.M.与Webb, F.H.，1992，《1987-1991年基于GPS测量的圣巴巴拉海峡变形》，《地球物理新闻通讯》，第19卷，第1491-1494页。 Sorlien, C.C.、Gratier, J.P.、Luyendyk, B.P.、Hornafius, J.S.及Hopps, T.E.，2000，《加利福尼亚州文图拉盆地陆上及近海奥克里奇断裂带晚新生代褶皱断裂地层的恢复制图》，《美国地质学会会刊》，第112卷，第1080-1090页。