Geological Survey research 1971, Chapter D

This collection of 39 short papers in the third published chapter of "Geological Survey Research 1971." The papers report on scientific and economic results of current work by members of the Geologic and Water Resources Divisions of the U.S. Geological Survey.  

Chapter A, to be published later in the year, will present a summary of significant results of work done in fiscal year 197, together with lists of investigations in progress, reports published, cooperating agencies, and Geological Survey offices.