http://pubs.usgs.gov/sim/3227/sim3227_readme.txt

Version 1.1, March, 2014
  - Minor edits were made to the geodatabase to correct geology
    and facilitate edgematch with adjacent USGS maps.
  - The database was upgraded from ArcGIS 9.3 to ArcGIS 10.2.
  - Changes made to the geodatabase are not reflected in the
    pamphlet or on map sheet PDFs.

U.S. Geological Survey Scientific Investigations Map SIM-3227
Geologic Map of the Tuba City 30' x 60' Quadrangle, Coconino
County, Northern Arizona

Description of digital dataset files posted on this website:

sim3227_readme.txt - this file

sim3227_metadata.txt - FGDC compliant metadata. Each Geodatabase
Feature Class also has its own metadata.

tuba_db.zip - zipped package of files necessary to create an
ArcMap Personal Geodatabase project.
   -- readme_tuba_db.txt
   -- tubacity100k_v1.1.mdb - ArcGIS Personal Geodatabase
   -- tubacity100k.style - ArcMap style for symbolizing data
   -- f36111a1.tif - 1:100,000-scale DRG base

tuba_shape.zip - zipped package of Feature Classes converted to
shapefiles to facilitate use of the data in ArcMap and other
applications.
   -- readme_tuba_shape.txt
   -- tuba_shapefiles_v1.1 - shapefiles folder
   -- tubacity100k.style - ArcMap style for symbolizing data
   -- f36111a1.tif - 1:100,000-scale DRG base