Geophysical Characteristics of the Conterminous United States: Lithology - Nutrient Source Data

This workbook summarizes nutrient geochemical data for each lithology contained within the USGS Preliminary Integrated Geologic Map Databases for the United States (Open File Reports 2004-1355, 2005-1305, 2005-1323, 2005-1324, 2005-1325, 2005-1351, and 2006-1272). The geochemical attributes in the “Lith Summary” spreadsheet (tab) are measures of central tendency for all whole rock analyses publically available at the time of creation for 284 lithologies, reported as percent sulfur and nitrogen. Further details on how data were summarized and sources for geochemical data are contained in the “ReadMe” spreadsheet (tab).本工作簿汇总了美国地质调查局（United States Geological Survey, USGS）《美国初步综合地质图数据库》所涵盖的各类岩性的营养元素地球化学数据，该数据库相关内容收录于美国地质调查局开放文件报告2004-1355、2005-1305、2005-1323、2005-1324、2005-1325、2005-1351及2006-1272中。“Lith Summary”电子表格（工作表标签）中所列的地球化学属性，为该数据集创建时公开可获取的全部284种岩性的全岩分析结果的集中趋势度量值，以硫和氮的百分比形式进行报告。有关数据汇总方法及地球化学数据来源的更多细节，均收录于“ReadMe”电子表格（工作表标签）中。