PREFACE 



This report provides information on the development and use of the pneumatic 

 vibratory coring apparatus and on the analyses of cores used by the Coastal 

 Engineering Research Center (CERC) during the past 18 years to assess offshore 

 sand and gravel resources and to study the geologic character of U.S. coastal 

 areas. The work was carried out under the coastal processes program of CERC. 



This is the second of three reports which describe procedures for conducting 

 offshore sand resources surveys to locate potential sources of sand for beach 

 restoration and nourishment. The first report (Prins, 1980) discussed prelimi- 

 nary procedures for establishing a sand resources survey program. The third 

 report will cover the use of seismic reflection data in sand resources surveys. 



The report was prepared by Edward P. Meisburger and S. Jeffress Williams, 

 Research Geologists, under the general supervision of Dr. C.H. Everts, Chief, 

 Engineering Geology Branch, Engineering Development Division. 



Comments on this publication are invited. 



Approved for publication in accordance with Public Law 166, 79th Congress, 

 approved 31 July 1945, as supplemented by Public Law 172, 88th Congress, 

 approved 7 November 1963. 



TED E. BISHOP 



Colonel, Corps of Engineers 



Commander and Director 



