of2008-1003_readme.txt 
====================== 
 
Daniel Scheirer, USGS, dscheirer@usgs.gov 
 
Digital Gravity Data: 
--------------------- 
The gravity data file: of2008-1003_gravity_data.csv  
contains principal facts of 750 gravity stations within the  
Arbuckle-Simpson geophysics study area (Figure 1) of USGS 
Open-File Report 2008-1003. 
 
The data are provided in comma-separated-value (CSV) ASCII  
text format, which can be read and imported with numerous  
programs such as spreadsheet programs.  The data columns  
are labeled in the first line of the CSV file, and  
anomalies were calculated as described in the text 
of this report (of2008-1003.pdf). 
 
Gravity stations collected in various campaigns have 
different station name prefixes, which are listed in 
comment lines (starting with "#") in the CSV file. 
 
Digital Ground Magnetic Data: 
----------------------------- 
The magnetic data file: of2008-1003_magnetic_data.csv 
contains principal facts of the 15 ground magnetic  
traverses within the Arbuckle-Simpson geophysics study  
area (Figure 1) of USGS Open-File Report 2008-1003. 
 
The data are provided in comma-separated-value (CSV) ASCII  
text format, which can be read and imported with numerous  
programs such as spreadsheet programs.  The data columns  
are labeled in the lines of the CSV file that start with 
the "#" character; these lines also delimit different survey  
traverses. Magnetic anomaly values of -999999 occur when  
no valid magnetic anomalies were calculated.