Hydrologic and geochemical data for the Big Brown lignite mine area, Freestone County, Texas

Abstract

Introduction Purpose and scope Previ ous studi es Acknowledgments We! 1-numberi ng system Physical and climatic setting Geologic and hydro!ogic setting Geology Ground water Data col 1 ecti on Spoi 1 s ma ten al Ground water Sel ected references ILLUSTRATIONS meter millimeter kilometer degree Celsius National Geodetic Vertical Datumof 1929 (NGVD of 1929): derived from a general adjustment of the first-order level United States and Canada, formerly called "mean sea level."