NOTE: This file is a modified version of the original README file.
The original Open-File Report contains text files, AMLs, SMLs, and symbol
sets that are not included with the data files received from VCGI. 
The description of these supporting files has been deleted from this modified 
README file. To obtain the original supporting files contact the Vermont 
Geological Survey, Agency of Natural Resources, 103 South Main St., Laundry 
Bldg., Waterbury, VT 05671.

Modified November 8, 2001

                      U.S. DEPARTMENT OF THE INTERIOR
                          U.S. GEOLOGICAL SURVEY


                  Digital Bedrock Geologic Map of the 
                     Plymouth Quadrangle, Vermont
                                     

                                   by

                 Gregory J. Walsh(1) and Nicholas M. Ratcliffe(1)
                         



                             Open-File Report 


                     OF-94-654-A Maps (paper copy)
                    OF-94-654-B Database

                                   1994


                    Prepared in cooperation with the 
                   State of Vermont, Geological Survey


This report is preliminary and has not been reviewed for conformity
with U.S. Geological Survey editorial standards (or with the North
American Stratigraphic Code). Any use of trade, product, or firm
names is for descriptive purposes only and does not constitute
endorsement by the USGS. Although this database has been used by
the U.S. Geological Survey, no warranty, expressed or implied, is
made by the USGS as to the accuracy and functioning of the database
and related program material, nor shall the fact of distribution
constitute any such warranty, and no responsibility is assumed by
the USGS in connection therewith.
________________________________
(1) U.S. Geological Survey
Reston, VA 22092

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Source of Geologic Data:
All data except for outcrops and joints derived from:

Walsh, G.J.,and Ratcliffe, N.M., 1994, Preliminary bedrock geologic map of the 
Plymouth quadrangle and eastern portion of the Killington Peak quadrangle,
Windsor and Rutland counties, Vermont:  U.S. Geological Survey Open-File
Report 94-225, scale 1:24,000.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
This report (OF 94-654) is available from:

Vermont Agency of Natural Resources
Vermont Geological Survey
103 South Main St., Laundry Building
Waterbury, VT 05671
Telephone: (802) 241-3608

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Direct questions or comments on the geology to:
Gregory Walsh (USGS, Mail Stop 926A, Reston, VA 20192)
Nicholas Ratcliffe (USGS, Mail Stop 926A, Reston, VA 20192)

Direct questions or comments on the database to:
Gregory Walsh (USGS, Mail Stop 926A, Reston, VA 20192)
e-mail:  gwalsh@usgs.gov
WWW: http://geology.er.usgs.gov/gmapeast/vtp/vermont.html
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Date of latest revision:  November 23, 1994

This database was created in PC ARC/INFO version 3.4D Plus on an
IBM-compatible personal computer.  Digitized by Thomas Merrifield,
Vermont Geological Survey, Office of Information Management Services.

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
NOTE: (the following section contributed on 6/19/98 by Laura Cadmus of
VT ANR following the data conversion from NAD27 to NAD83.)

Part B of this Open-File Report contains all of the geologic information, 
including macros, text files, symbol files and topographic information. 

Files are in ArcInfo interchange format and will require using the 
import command in either PCArcInfo or ArcInfo uncompress.  
In ArcView the user must use the Import71 utility to uncompress 
the files to add as themes. 

The digital data included in this report was reprojected from 
State Plane Meters NAD27 datum to State Plane Meters NAD83 datum by 
Information Management Services, Vermont Agency of Natural Resources 
on April 28, 1998.

_____________

COVERAGES
 	CONTACTS  ... Polygon Coverage for map units
OUTCROP    ... Polygon Coverage for OUTCROPS 
 	SCHISTCL  ... Line Coverage for SCHISTOSITY
 	SCHISTPT  ... Point Coverage For SCHISTOSITY
DUCFLTCL  ... Line Coverage for DUCTILE THRUST FAULTS
DUCFLTPT  ... Point Coverage for DUCTILE THRUST FAULTS
 	GNEISSCL  ... Line Coverage for GNEISSOSITY
GNEISSPT ... Point Coverage for GNEISSOSITY
 	CRENPT    ... Point Coverage for CLEAVAGE
BRITCL    ... Line Coverage for BRITTLE FEATURES
BRITPT    ... Point Coverage for BRITTLE FEATURES
TOPO    ... Line coverage for TOPOGRAPHY
 	ROADS     ... Line coverage for ROADS (from the Vermont Center
                  for Geographic Information, Inc.)
NEAT2     ... Line coverage for neatline boundary
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
The following list gives a brief description of the organization of 
the ARC/INFO coverages:

CONTACTS coverage:
   Item "LITH" in CONTACTS.PAT contains the map unit designators (Kd, Cob, etc.)
   Look-up table CONTACTS.LUT contains the following items:
     
     LITH = map unit designator
     AGE_SORT = a relative number used to sort the map units by age 
     FORMATION = the formation name
     AGE = geologic age of the map unit
     MAP_UNIT = description of rock type(s)

SCHISTOSITY, GNEISSOSITY, DUCTILE FAULTS, CLEAVAGE, AND BRITTLE
FEATURE coverages:
   The *.PAT files for the POINT coverages contain the 
   following items pertaining to the orientation (strike and dip):
   
     DIP = dip value, where V = 90
     AZ  = STRIKE or AZIMUTH value measured from North  
                                             
                                               0
        North = 0                              |
        East = 90                     270 -----|----- 90
        South = 180                            |
        West = 270                            180
        
     TYPE = refers to type of symbol with the following characters:
        I = Inclined
        V = Vertical
        DT = Ductile Thrust
        ODT = Overturned Ductile Thrust
        VF = Vertical Brittle Fault
        IF = Inclined Brittle Fault
        VJ = Vertical Brittle Joint
        IJ = Inclined Brittle Joint
        IC = Inclined Cleavage
        VC = Vertical Cleavage
     SYMBOL_ANG  = refers to a standard cartesian angle measured   
     from EAST:                              
                                             90
        North = 90                            |
        East = 0                     180 -----|----- 0
        South = 270                           |
        West = 180                           270
        
        (SYMBOL_ANG is used for symbol rotation and for computation of AZ)

In addition to the above, BRITPT.PAT contains the following items as
separate points:

     VERT_DISP =  Relative Vertical Displacement 
          Values are either DU or UD when read from top to bottom
          with the letters printed upright as follows:

                  DU =  D       or     UD =  U
                                          
                        U                    D
                     (where U = up and D = down) 
          
     LAT_DISP =   Relative Lateral Displacement 
          Values are either CC (Counter Clockwise) or CW (Clockwise)  

Custom FONTS/MARKERS in IGLFNT file: 
   FONT 18  Custom Marker symbols by pattern number,
   patterns 32 - 43 used with line coverages:
         32 Inclined schistosity 
         33 Inclined ductile thrust 
         34 Vertical schistosity 
         35 Brittle fault, relative lateral displacement  CC
         36 Brittle fault, relative lateral displacement  CW
         37 Brittle fault, relative vertical displacement CW
         38 Brittle fault, relative vertical displacement CC
         39 Inclined joint
         40 Vertical joint
         41 Inclined brittle fault
         42 Vertical brittle fault
         43 Overturned ductile thrust
   Patterns 47 - 60 are standard strike and dip symbols:
         44 Inclined gneissosity
         45 Vertical gneissosity
         46 Outcrop pattern (irregular polygon)
         47 Inclined cleavage
         48 Vertical cleavage
         49 Inclined bedding
         50 Vertical bedding
         51 Inclined schistosity
         52 Vertical schistosity
         53 Inclined gneissosity
         54 Vertical gneissosity
         55 Inclined joint
         56 Vertical joint
         57 Inclined brittle fault
         58 Vertical brittle fault
         59 Inclined dike
         60 Vertical dike

^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
END
