Directory Identifier: GRAVCD-wisc3
Directory Title: Wisconsin Gravity Data for the Wisconsin Rapids Area
Principal Investigator: Professor C. Patrick Ervin
Contributing Organization: Northern Illinois University
                           Department of Geology
                           DeKalb, IL 60115

Summary: The gravity station data (7102 records) were compiled by 
Professor Ervin.  This data base was received in April 1993.  
Principal gravity parameters include Free-Air Anomalies and 
Simple Bouguer Anomalies (no terrain correction applied).  The 
observed gravity values are referenced to the International 
Gravity Standardization Net 1971 (IGSN 71).  The gravity anomaly 
computation uses the Geodetic Reference System 1967 (GRS 67) 
theoretical gravity formula.  The data are randomly distributed 
within the area of central and northwestern Wisconsin north of 44 
degrees north latitude.

CAVEAT:  Some of the data in this file may be duplicated in WISC4B.