Preliminary geologic map of the Topanga 7.5' quadrangle, southern California: A digital database

This Open-File report is a digital geologic map database. This
digital map database is compiled from previously published sources
combined with some new mapping and modifications in nomenclature.
The geologic map database delineates map units that are identified
by general age and lithology following the stratigraphic
nomenclature of the U. S. Geological Survey. For detailed
descriptions of the units, their stratigraphic relations and
sources of geologic mapping consult Yerkes and Campbell (1994).
More specific information about the units may be available in the
original sources.

本公开文件报告所收录的为一套数字地质图数据库。该数字地质图数据库整合了既往已发表的相关资料，并补充了部分新填图成果与术语修订内容。本地质图数据库依据美国地质调查局（U.S. Geological Survey）的地层命名体系，按照大致年代与岩性对图幅单元进行划分与标注。若需了解各图幅单元的详细描述、地层接触关系及地质填图资料来源，请参阅Yerkes与Campbell（1994）的相关研究成果。有关各图幅单元的更多详细信息，可查阅原始参考文献。