Regional Geology of Eastern Labrador
Readme File for GIS Shapefiles

The GIS shapefiles contain the same data as the ArcGIS layers in the file geodatabase of the same name.  

An explanation of each file is outlined below. For a description of each column of the point data files, please refer to the \Metadata\Metadata_Tables_Spreadsheets.xlsx file.

GIS Files:
Note that for these shapefiles, cells in numeric columns, containing no data for that record, contain the placeholder code -99 or -999, whereas in the related Excel files the blank cells remain blank.  The -99 or -999 code is to keep the numeric cell from being filled with zero’s when opened in a GIS.

Data\

Dykes: extracted from Structure layer (included in Structure as well)

GeochronArK: K-Ar and Ar-Ar geochronological data (hyperlinked to Data\Imagery\ScannedGeochron\ArK)

GeochronNdSm: Nd-Sm geochronological data

GeochronRbSr: Rb-Sr geochronological data (hyperlinked to Data\Imagery\ScannedGeochron\RbSr)

GeochronUPb: U-Pb geochronological data (hyperlinked to Data\Imagery\ScannedGeochron\UPb)

Geothermobarometry: geothermobarometric data

MapAnno: topographic annotations (e.g., Gilbert River), visible at 1:250,000 and larger scales

MineralOcc: mineral occurrences in eastern Labrador

MineralXRD: minerals identified by XRD method

OxygenIsotopeData: oxygen isotope data (7 records)

Paleomag: paleomagnetic data, some unpublished

PaleomagEmslie: a cross-referencing tool linking Emslie’s paleomag sites, with his field sites and labels used in journal publication

Petrography: petrographic data

Photomicrographs: photomicrographs (hyperlinked to Data\Imagery\Photomicrographs)

Photos: field photographs (hyperlinked to Data\Imagery\ScannedPhotos)

Samples: rock samples collected (hyperlinked to Data\Imagery\ScannedSlabs)

Stations: field station locations

Structure: listing of all structural data for eastern Labrador

StructureFiltered_Outcrop: structural data filtered using S. Colman-Sadd’s PlotSymbol program to move overlapping symbols at the 1:100 000-scale, remove lower priority symbols, and add outcrop locations
	
StructureKinematics: structural kinematic data

WholeRockGeochemistry: whole rock geochemical data with one column of compiled data for each element, as opposed to the non-GIS file below

Geology\

SELab_Bedrock_Geology: 1:100 000-scale geology units

SELab_Contacts: contacts, neatline and limit of mapping for 1:100 000-scale mapping 

SELab_Faults: 1:100 000-scale faults (need fault ttf fonts in StyleFonts folder)

SELab_Geology_Anno: geological unit annotations (e.g., P3Crg), visible at 1:250 000 and larger scales

GeoPhysics\

Govt_Airborne_Survey_Index: information about the gov’t survey (c. 1970)	

Industry_Airborne_Survey_Index: information about each airborne survey
	
Industry_Flight_Lines: airborne flight line information

Topography\

The BaseMap_NL topographic data is based on the 1:1 million scale regional maps.

The 1:50 000 and 1:250 000 scale data are from the National Topographic Data Base (NTDB). [Permission to provide the NTDB layers (NAD27 format) was provided by the Director of GIS and Mapping Division, Department of Fisheries and Land Resources, Government of Newfoundland and Labrador, July 2017.]

BaseMap_NL\

Lakes_NL: regional lakes for Newfoundland and Labrador

LandBase: polygonal land base map of eastern Canada

Ocean: polygonal off-shore area of eastern Canada

WaterLine_NL: regional rivers for Newfoundland and Labrador

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Elevation_50: NTDB contours at 1:50 000 scale 

Elevation_250: NTDB contours at 1:250 000 scale

LabradorRoads: polyline estimate of road location from gps readings and other sources

MapGridLines_50: 10 km UTM lines

Neatline: neat line polygons of Geology Maps 2010-01 to 2010-25 (hyperlinked to ..\PDF_Maps)
	
NTS_Grid_Box: neat line polygons of 1:50 000 NTS map sheets

Road_Points: field gps point readings of road location
	
Transportation_50: NTDB roads at 1:50 000-scale

Transportation_250: NTDB roads at 1:250 000-scale
	
Water_Lines_50: NTDB rivers and shorelines at 1:50 000-scale
	
Water_Lines_250: NTDB rivers and shorelines at 1:250 000-scale
	
Water_Polygons_50: NTDB lakes and ocean (white fill) at 1:50 000-scale
	
Water_Polygons_250: NTDB lakes and ocean (white fill) at 1:250 000-scale