         VGS Open File Report #VG95-6(A and B) - MT. ELLEN QUADRANGLE



                        VERMONT GEOLOGICAL SURVEY
                            STATE OF VERMONT
                       AGENCY OF NATURAL RESOURCES

               Digital Compilation Bedrock Geologic Map of the Mt. Ellen
                    7.5 minute Quadrangle, Vermont

                        Geology by Dr. Rolfe Stanley(1), Greg Walsh, Peter Tauvers, 
			Joseph DiPietro, and Vince DelloRusso
                        
			Compiled by Rolfe Stanley (1) and Marjorie Gale (2), 1995

			Digitized by Thomas Merrifield (3) and David Dreher, 1995

                      	VG95-6-A Maps (paper copy)
                    	VG95-6-B Database

__________________

(1) Department of Geology, University of Vermont, Perkins Building, 
Burlington, Vermont 05401
(2) Vermont Geological Survey, State of Vermont Agency of Natural
Resources, 103 S. Main St., Laundry Building, Waterbury, Vermont 05671
(3) State of Vermont Agency of Natural Resources, 103 S. Main St., 
Center Building, Waterbury, Vermont 05671
This map has been produced in cooperation with the U.S. Geological Survey, National 
Cooperative Geologic Mapping Program.
*************************************************************************

Source of Geologic Data:

DelloRusso, V. and Stanley, R.S., 1986, Bedrock geology of the northern part of the Lincoln Massif, 
central Vermont: Vermont Geological Survey Special Bulletin No. 8, 27 p.

DiPietro, J.A., 1983, Geology of the Starksboro area, Vermont: Vermont Geological Survey Special 
Bulletin No. 4, 14 p.

Tauvers, P.R., 1982, Bedrock geology of the Lincoln area, Vermont: Vermont Geological Survey 
Special Bulletin No. 2, 8 p.

Walsh, G.J., 1992, Bedrock geology of the Fayston-Buels Gore area, central Vermont: Vermont Geological 
Survey Special Bulletin No. 13, 74 p.

Additional data is derived from field mapping by Dr. Stanley (1). 
This map has been produced in cooperation with the U.S. Geological Survey, National 
Cooperative Geologic Mapping Program.
**************************************************************************

Digital compilation of maps required some standardization of terms and changes 
in the geology shown on the source maps. However,every effort was made to preserve the 
detailed geology as mapped by individuals, including their use of symbols, nomenclature, 
unit descriptions, structures and so on. Each quadrangle is, therefore, a unique map and 
terms, symbols, mapped units etc. are not consistent across quadrangle boundaries. 
Similar symbols and terms on one quadrangle may not correlate with usage on an adjacent 
quadrangle, particularly since the maps were produced over a 20 year period and represent 
changes in the understanding and interpretation of Vermont geology. 
*************************************************************************

This Report VG95-6-(A and B), is available from:

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

Direct questions or comments to:
Marjorie Gale at the above adress and phone number or e-mail
marjieg@dec.anr.state.vt.us

*************************************************************************

Data was last revised on 7/95.

Data was reprojected from State Plane Meters NAD27 datum to State Plane Meters
NAD83 datum on 6/22/98 by Laura Cadmus, Vermont Agency of Natural Resources,
Office of Information Management Services.

This database was created in PC Arc/Info 3.4d Plus on an IBM-compatible personal
computer. 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.
____________

Part B of this open file report includes the geologic information and the text and symbol files for the plots.

Other coverages such as Road, streams and Topographical data may be 
used to enhance this information.  
Other coverages are available through: Vermont Center for Geographic Information

         VCGI 
         590 Main Street
         University of Vermont   
         Burlington, Vt. 05405-0106
         http://geo-vt.uvm.edu/
         (802) 656-4277


Every attempt has been made to keep these digital coverages in
a format compatible with data collected and compiled by the 
United States Geological Survey.

Coverage names and structures have been kept consistant, however
format and naming conventions from individual contributors differ and
the format of these preliminary data have been purposely kept flexible.
As the project matures, these differences will be softened if not 
eliminated.  

Coverages:

       Contacts .....   Lithographic contact layer.
             Polygon coverage, Designation is stored in the
                 field lith in the PAT.DBF file      
                 In addition to Standard Arc Info files, there
                 is a Look Up Table (LUT) - Key.dbf which contains 
                 a corresponding LITH value and a SYMBOL which
                 contains a numeric color value.  This LUT is 
                 use with the POLYGONSHADE command to color code
                 the contacts layer.  There is also a file Shade.key
                 which is used to build the map Key.
        Outcrop .....   Exposed outcrop layer
       
        Ducfltcl ....  Line coverage containing Faults, Anticlines and
                       Synclines
        Folpt ....   Point layer containing structural Information,
        Optionally, more structural data may be contained in 2 additional coverages. 
                  Schistpt, Crenpt                 


DUCFLTCL COVERAGE CONTAINS  Faults, Anticlines & Synclines
the Field 'TYPE' in the file AAT.bat is used to differentiate .



Line Types         Description

SMF   Thrust fault: teeth on upper plate; pre to syn-S2.
PRM   Pre-metamorphic faults 
POM   Post-peak metamorphic fault 
HAF   High angle fault:relative motion indicated,where known, 
         by U (up) and D (down). Tick mark indicates dip direction.
HAA   High angle fault: dip direction and relative motion unknown.
ACA   Thrust fault: barbs on upper plate, hatchures indicate dip 
         direction of overturned fault, Acadian fault.
BAF   Thrust fault, steep dip.
TOA   Overturned anticline
TOS   Overturned syncline
TFS   Syncline
FTA   Anticline




The coverages FOLPT,SCHISTPT and CRENPT contain point data consisting
of trend and fold data:
  DIP
  AZimuth
  Dipdir .... Dip  Direction
  TYPE   ...  Type 
  SYMBOL_ANG ...  Cartesian angle used to orient symbols and to 
      calculate the Azimuth.

   The *.PAT files for the POINT coverages contain the 
   following items pertaining to the orientation (strike and dip):
   
     DIP = dip value 
     AZ  = STRIKE or AZIMUTH value measured from North  
                                             
                                               0
        North = 0                              |
        East = 90                     270 -----|----- 90
        South = 180                            |
        West = 270                            180
        
   
 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)

      Dip Direction is the angular direction of the upper plate.

There is also an associated Look Up Table for each coverage  LUT1.dbf 
which is used with the POINTMARKER command to orient the marker on the 
map.  
 
          POINTMARKER FOLPT SYMBOL_ANG FOLPT.lut1  ANGLE  
 

Markers are defined in IGLFNT  fonts 19 and 20 and Cogeolin\mrk.dbf

TYPE       Marker  Font   Pattern        Description


  UV6        1         19         37  Inclined Schist  (Sn) 
  UV7        2         19         38  Vertical Schist
  UV8        3         19         39  Inclined Cleavage  (Sn)
  UV9        4         19         40  Vertical Cleavage 
  UVA        5         19         41  Inclined Cleavage (SN + 1)
  UVB        6         19         42  Vertical Cleavage
  UVC        7         19         43  Isoclinal Fold  (FN)
  UVD        8         19         44                  (FN + 1) 
  UVE        9         19         45                  (FN + 2) 
  UVF        19        19         46  Strike and Dip of Bedding
  UVG        20        19         47   
  UVH        21        19         48  Inclined Parallel Schist  (SN)
  UVI        22        19         49  Overturned bedding (S0) 
  OCP        23        19         54  Outcrop
  LIN        24        19         55  Line used in Contacts Key  
  UVJ        38        19         62 
  UVK        39        19         63   
  TPH        40        19         64  
  GEN        41        19         65   Graded Bedding
  GBO        42        19         66   Overturned Graded Bedding 

Linear Features
  UV1        10        20         32  Trend & Plunge  Fn
  UV2        11        20         33  Trend & Plunge  Fn + 2 
  2CL        33        20         40       Clockwise Rot
  2CC        34        20         41       Counter Clock Root 
  UV3        12        20         34  T & P of Mineral lineation 
  UV4        14        20         35  T & P of Quartz Rods 
  UV5        14        20         36  T & P of intersection of Sn / SN+1 
  TP         27        20         37  T & P    Fn + 3  
  CLT        28        20         38     Clockwise Rotation
  CCT        29        20         39     Counter Clockwise Rotation 
  TPR        35        20         42  T & P Fn + 3a
  CLR        36        20         43      Clockwise Rotation
  CWR        37        20         44      Counter Clockwise Rotation 
  
Used in Key  defining the Ductile Faults Layer

  HAF        15        19         52
  TOA        17        19         50
  TOS        18        19         51
  TFS        30        19         56 
  TFA        31        19         57 
  ACA        32        19         58 
  SMF        1         19         37
  POM        16        19         53
  PRM        7         19         43




