Geologic Map of the Monterey and Seaside 7.5-minute Quadrangles, Monterey County, California: A Digital Database

This Open-File report is a digital geologic map database stored in a computer in the U. S. Geological Survey offices in Menlo Park, California. The study area includes the Monterey Peninsula and part of the Carmel Valley area. Geologically, this region is situated within the complexly deformed Salinian block between the active San Andreas fault to the northeast and the San Gregorio fault zone to the southwest. It also is characterized by compressional tectonics related to the San Andreas fault system and includes many poorly understood subsidiary faults (Greene and others, 1988). A series of high-angle faults trends northwestward across the quadrangles. Most of the faults in the area are discontinuous, with some less than 1 km long; however, the Tularcitos fault zone continues across the entire mapped area. These faults displace the Monterey Formation and locally offset Quaternary deposits.本公开文件报告为一套数字地质图数据库，存储于美国地质调查局（U.S. Geological Survey）位于加利福尼亚州门洛帕克的办公场所内。本次研究的覆盖范围包括蒙特雷半岛（Monterey Peninsula）以及卡梅尔谷（Carmel Valley）的部分区域。从地质角度而言，该区域坐落于复杂变形的萨利尼亚地块（Salinian block）范围内，其东北侧为活跃的圣安德烈斯断层（San Andreas fault），西南侧为圣格雷戈里奥断层带（San Gregorio fault zone）。该区域同时具有与圣安德烈斯断层系相关的挤压构造特征，且存在大量尚未被充分认知的次级断层（Greene等人，1988）。一系列高角度断层呈北西向延伸穿过本区地质图幅。区内多数断层均不连续，部分断层长度不足1千米；但图尔西托斯断层带（Tularcitos fault zone）贯穿整个测区范围。这些断层使蒙特雷组（Monterey Formation）发生错动，并在局部区域使第四纪沉积物产生位移。