Hydrogeology of Nevada

These data were released prior to the October 1, 2016 effective date for the USGS’s policy dictating the review, approval, and release of scientific data as referenced in USGS Survey Manual Chapter 502.8 Fundamental Science Practices: Review and Approval of Scientific Data for Release. This data set consists of hydrogeology for the State of Nevada. Consolidated rocks and unconsolidated sediments are the two major hydrogeologic units. Consolidated rocks are subdivided into 8 hydrogeologic units: (1) carbonate rocks, Quaternary to Tertiary-age; (2) basaltic, (3) rhyolitic, and (4) andesitic volcanic flows; (5) volcanic breccias, tuffs, and volcanic rocks older than Tertiary-age; (6) intrusive and metamorphic rocks; (7) consolidated [...]

本数据集发布于2016年10月1日之前，符合美国地质调查局（United States Geological Survey, USGS）发布的科学数据审核、批准与发布相关政策，该政策详见USGS《调查手册》第502.8章《基础科学实践：科学数据发布的审核与批准》。本数据集涵盖内华达州的水文地质数据。固结岩石与松散沉积物为两大主要水文地质单元。其中固结岩石可进一步划分为8个水文地质单元：(1) 第四纪至第三纪碳酸盐岩；(2) 玄武质熔岩流、(3) 流纹质熔岩流及(4) 安山质熔岩流；(5) 第三纪之前形成的火山角砾岩、凝灰岩及其他火山岩；(6) 侵入岩与变质岩；(7) 固结[...]