Faults--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 "Faults_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.

本部分隶属于SIM 3281数据集，提供美国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）所需的褶皱相关数据。矢量数据文件存储于"Faults_OffshoreSantaBarbara.zip"压缩包中，可通过http://pubs.usgs.gov/ds/781/OffshoreSantaBarbara/data_catalog_OffshoreSantaBarbara.html获取。

该制图区位于加利福尼亚大陆边缘带（California Continental Borderland）以北的西横向山脉地质省（Western Transverse Ranges geologic province）内（Fisher等，2009）。自中新世以来，该地质省经历了显著的南北向挤压作用；最新全球定位系统（GPS）观测数据显示，其南北向缩短速率约为6毫米/年（Larson与Webb，1992）。活动的东西向皮塔斯点断层（Pitas Point Fault，为包含南倾逆断层的宽阔断裂带）、红山断层（Red Mountain Fault）以及林孔溪断层（Rincon Creek Fault）均为该挤压缩短作用所涉及的构造（详见Jackson与Yeats，1982；Sorlien等，2000；Fisher等，2009）。该断裂系统整体延伸约100千米，横穿文图拉盆地与圣巴巴拉盆地，是一类重要的地震危险源（详见Fisher等，2009）。

参考文献：
Fisher, M.A.、Sorlien, C.C. 与 Sliter, R.W., 2009，《圣巴巴拉海峡东部至达纳角以南加州近海潜在地震断层》，收录于Lee, H.J. 与 Normark, W.R. 主编的《城市海洋中的地球科学——南加州大陆边缘带》，美国地质学会特刊454（Geological Society of America Special Paper 454），第271-290页。
Jackson, P.A. 与 Yeats, R.S., 1982，《加利福尼亚州西横向山脉卡平特里亚盆地的构造演化》，《美国石油地质学家协会通报》（American Association of Petroleum Geologists Bulletin），第66卷，第805-829页。
Larson, K.M. 与 Webb, F.H., 1992，《1987-1991年GPS观测揭示的圣巴巴拉海峡形变》，《地球物理通讯快报》（Geophysical News Letters），第19卷，第1491-1494页。
Sorlien, C.C.、Gratier, J.P.、Luyendyk, B.P.、Hornafius, J.S. 与 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层带褶皱与断裂晚新生代地层的图复原》，《美国地质学会通报》（Geological Society of America Bulletin），第112卷，第1080-1090页。