UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 



REPORT DOCUMENTATION PAGE 



READ INSTRUCTIONS 

 BEFORE COMPLETING FORM 



1. REPORT NUMBER 



CETA 79-7 



2. GOVT ACCESSION NO. 



3. RECIPIENT'S CATALOG NUMBER 



4. TITLE (and Subtitle) 



DEFINITION AND USE OF THE PHI GRADE SCALE 



5. TYPE OF REPORT & PERIOD COVERED 



Coastal Engineering 

 Technical Aid 



6. PERFORMING ORG. REPORT NUMBER 



7. AUTHORfsJ 



R.D. Hobson 



8. CONTRACT OR GRANT NUMBERfsJ 



9. PERFORMING ORGANIZATION NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center (CEREN-GE) 



Kingman Building, Fort Belvoir, Virginia 22060 



D31235 



n. CONTROLLING OFFICE NAME AND ADDRESS 



Department of the Army 



Coastal Engineering Research Center 



Kingman Building, Fort Belvoir, Virginia 22060 



12. REPORT DATE 



November 1979 



13. NUMBER OF PAGES 

 18 



U. MONITORING AGENCY NAME & ADDRESSC// d/«eren( from Controlling Office) 



IS. SECURITY CLASS, (of this report) 



UNCLASSIFIED 



16. DISTRIBUTION ST ATEMENT fo/ f/iis ReporO 



Approved for public release, distribution unlimited. 



17. DISTRIBUTION STATEMENT (of the abstract antered In Black 20, It different from Report) 



te. SUPPLEMENTARY NOTES 



19. KEY WORDS (Continue 



aide II necesaary and Identify by block number) 



Grain-size distribution 



Phi grade scale 



Sediment texture classifications 



20. ABSTRACT CCoatbiuw am rwirermm aftte ff n^ai e a aary aad. Identify by block number) 



This report describes the phi grade scale and how it can be used to 

 classify and analyze sediment texture. 



DD 1 j,M 73 1^73 EDtTlON OF » NOV 65 IS OBSOLETE 



UNCLASSIFIED 



SECURITY CLASSIFICATION OF THIS PAGE (When Data Entered) 



