http://pubs.usgs.gov/sim/2007/2977/cmreadme.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-2977
Geologic Map of the Cameron 30' x 60' Quadrangle, Coconino County,
Northern Arizona

Description of digital dataset files posted on this website:

cmreadme.txt - this file

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

cm_db.zip - zipped package of files necessary to create an
ArcMap Personal Geodatabase project.
    -- readme_cmdb.txt
    -- cameron100k_v1.1.mdb - ArcGIS Personal Geodatabase
    -- cameron100k.style - ArcMap style for symbolizing data
    -- f35111e1.tif - 1:100,000-scale DRG base

cm_shape.zip - zipped package of feature classes converted to
shapefiles to facilitate use of the data in ArcMap and other
applications.
    -- readme_cmshape.txt
    -- cm_shapefiles_v1.1 - shapefiles folder
    -- cameron100k.style - ArcMap style for symbolizing data
    -- f35111e1.tif - 1:100,000-scale DRG base