http://pubs.usgs.gov/sim/3094/inyo_readme.txt

Description of digital dataset files posted on this website:

inyo_readme.txt - this file

inyo_meta.txt - FGDC compliant metadata. Each geodatabase feature class also has its own metadata.

inyo_db.zip - zipped package of files necessary to create an ArcMap Personal Geodatabase project.
    -- readme_inyo_db.txt
    -- inyomtns.mdb - Personal geodatabase
    -- inyo24k.style - ArcMap style for symbolizing data
    -- inyo_base.zip - zipped 1:100,000-scale DRG base

inyo_shape.zip - zipped package of feature classes converted to shapefiles to facilitate use of the data in ArcMap and other applications.
    -- readme_inyo_shape.txt
    -- inyo24k.style - ArcMap style for symbolizing data
    -- inyo_base.zip - zipped 1:100,000-scale DRG base
    -- Shapefiles include:
      -- inyoatd.shp - attitude and fault data 
      -- inyofld.shp - fold axes
      -- inyoflt_carto.shp - cartographic symbols for faults
      -- inyoglg_arc.shp - geologic contacts and faults
      -- inyoglg_poly.shp - geologic unit polygons
      -- inyoglg_pt.shp - geologic unit points
      -- inyoldrs.shp - annotation leaders
      -- inyosec.shp - cross section lines