GEOSCIENCE ATLAS:
Bedrock Geology Help File
(Legends and Symbology)

1:1 Million Faults and Contacts:

1:1 Million Bedrock Geology: This digital file is derived from two individual 1:1 Million scale published hard copy maps. Please refer to the following citations:

Newfoundland Legend (pdf - 2Mb) : from Geology of the Island of Newfoundland (digital version of Map 90-01, with minor revisions) by Colman-Sadd, S.P., Hayes, J.P. and Knight, I. 1990: Scale: 1:1 000 000. Government of Newfoundland and Labrador, Department of Mines and Energy, Geological Survey Branch. Open File GS# NFLD/2192

Labrador Legend (pdf - 100Kb) : from Geological map of Labrador; by Wardle, R.J., Gower, C.F., Ryan, B., Nunn, G.A.G., James, D.T., and Kerr, A., 1997: Scale: 1:1 000 000. Government of Newfoundland and Labrador, Department of Mines and Energy, Geological Survey. Open File GS# LAB/1226

LINES LABRADOR:

These are the geological contacts and faults as published in:
Gower, C.F., 2010: Geology of the Grenville Province and adjacent eastern Makkovik Province, eastern Labrador. Geological Survey, Mines Branch, Department of Natural Resources, Government of Newfoundland and Labrador, Map 2010-50, Open File LAB/1575

SE Lab Contacts - Line
SE Lab Contacts - Symbol
SE Lab Faults - Line
SE Lab Faults - Symbol

The SE Lab Contacts data table contains one record for each segment of the polylines that define the polygon outlines.

Each record in the data table for the contact line file has the following fields:

Field Name	Description
MapNumber	Original map source
Feature	Type of contact line

SE Lab Contacts - Feature Values:

Contact feature code [Feature]	Description
Geologic Contact	These are unspecified contacts
Geo_close	Dummy line to close off polygons under lakes and where polygons were left open-ended on the source map
Limit of mapping	Extent of mapping
Neat line, original source	NTS area boundary of the source map

The SE Lab Faults data table contains one record for each segment of a fault.

Each record in the data table for the fault line file has the following fields:

Field Name	Description
MapNumber	Original map source
Feature	Type of contact line

SE Lab Faults - Features Values:

Fault feature code [Feature]	Description
Fault, normal	Normal Fault
Fault, normal_thrust	Normal fault reactivating thrust
Fault, strike-slip	Strike-slip fault
Fault, thrust	Thrust fault

LINES NEWFOUNDLAND:

These are the line files generated from Bedrock Geology Dataset- NFLD2616v.7. Please refer to the USER GUIDE below.

Detailed Contacts - Line
Detailed Contacts - Symbol
Generalised Contacts - Line
Lithofacies Contacts-Line
Tectonic Contacts- Line
Detailed Faults - Line
Detailed Faults - Symbol

Bedrock Geology Dataset - NFLD 2616 v.7 - User Guide
Includes "how to" information on

POLYGONS LABRADOR:

This shape file contains bedrock geology polygons. The source reference is:
Gower, C.F., 2010: Geology of the Grenville Province and adjacent eastern Makkovik Province, eastern Labrador. Geological Survey, Mines Branch, Department of Natural Resources, Government of Newfoundland and Labrador, Map 2010-50, Open File LAB/1575

For in depth detail of each geological unit the user is referred to the following memoir:
Gower, C.F.2019: Regional geology of eastern Labrador (eastern Makkovik and Grenville provinces). Government of Newfoundland and Labrador, Department of Natural Resources, Geological Survey, Memoir 4, 654 pages.[Geofile lab/1752] [Report] [Database]

The attribute table field names are: MapNumber, UNIT_LABEL, GENESIS, LITHOLOGY, GROUP, FORMATION, MEMBER refer to the published legend common to all Maps of Open file LAB/1575

MAPNUMBER refers to the individual 1:100,000 scale map in the series.

The values of RED, GREEN and BLUE may be used by MapINFO users to reproduce the published legend’s colour scheme. (See Symbology Files section below)

POLYGONS NEWFOUNDLAND:

These are the polygon files generated from the Bedrock Geology Dataset - NFLD2616v.7.

Bedrock Geology Dataset - NFLD 2616 v.7 - User Guide
Includes "how to" information on

Newfoundland Detailed Author Reference layer: During the production of the Detailed Bedrock Geology shapefile, individual source maps were not always used in their entirety. The “Newfoundland Detailed Author Reference” layer depicts which maps or subsections were used in the compilation. Each record in the Author Reference shapefile references the original published map. The author reference labels come into view when zoomed in to 1:750,000 or larger. This Author Reference layer is one more tool to aid the user in deciphering the bedrock geology of an area of interest. The Index of Bedrock Geology Maps, under the “Indexes” group in the Geoscience Atlas, along with the GEOFILES search engine may also be used to research other work carried out in an area.

1:1 Million Bedrock Geology:

SYMBOLOGY FILES:

For ArcGIS users, to symbolize the Newfoundland Lines and colour the Newfoundland Polygons and 1:1 Million Bedrock Geology Polygons, please download this zip file containing the associated layer files and the geomant.ttf font file (to be loaded into c:\Windows\Fonts).

For MapInfo users, to colour the bedrock geology polygons, download this zip file containing the AddColor.mbx program (written by L. Nolan). In MapInfo, run the program through the MapInfo Tools section. The Red/Green/Blue colour values are in various fields in the downloaded shape file tabular dataset (e.g., Red, Green and Blue fields). Convert the shape file to a MapInfo file before colourizing the polygons. Rather than the AddColor.mbx, some versions of MapInfo/Discover contain an RGB colourizer tool in the table utilities.

For QGIS users, select ‘Style Tab’, click ‘Simple Fill’ to launch the ‘Symbol layer type’ panel. Click the ‘expression’ button, select ‘Edit’ and apply the following expression: color_rgb( "RED" , "GREEN" , "BLUE" ) where the text RED, GREEN and BLUE represent those fields in the shapefile attribute table. Edit the expression with the actual field names and run the expression to fill the polygons with the correct colours.

The symbology font file, geomant.ttf, used to symbolize such things as point and line styles, can be obtained from this zip file.

Lines Labrador and Polygons Labrador symbology files are provided in:

Database to Accompany Memoir 4 - Regional Geology of Eastern Labrador (Eastern Makkovik and Grenville Provinces) by C.F. Gower, 2019

Gower, C.F.2019: Regional geology of eastern Labrador (eastern Makkovik and Grenville provinces). Government of Newfoundland and Labrador, Department of Natural Resources, Geological Survey, Memoir 4, 654 pages. [Geofile LAB/1752]

The layer files are included in the zip file, downloaded from here: Download

FURTHER GEOLOGICAL MAPS:

Individual uncompiled maps are available through the Geoscience Atlas Indexes group through the 'Index - Bedrock Geology Maps' layer. Click on an NTS sheet and in the Search Results window click on 'Links' on the left side of the table in order to view and download the pdf maps. These maps are also available on the Map Indexes website. Recent maps will soon be available as vector shapefiles and older maps will be available as georeferenced tif files. Check with the Contact person to determine if a map of interest is available in shapefile or tif format.

DISCLAIMER

Open File reports, maps and digital data issued by the Geological Survey Division of the Mining and Mineral Development Branch, Government of Newfoundland and Labrador, are made available for public use. They have not been formally edited or peer reviewed, and are based upon preliminary data and evaluation. The user agrees not to provide a digital reproduction or copy of this product to a third party. Derivative products should acknowledge the source of the data.

The Geological Survey, a division of the Mining and Mineral Development Branch, (the "authors and publishers"), retains the sole right to the original data and information found in any product produced. The authors and publishers assume no legal liability or responsibility for any alterations, changes or misrepresentations made by third parties with respect to these products or the original data. Furthermore, the Geological Survey assumes no liability with respect to digital reproductions or copies of original products or for derivative products made by third parties. Please consult with the Geological Survey in order to ensure originality and correctness of data and/or products.

RECOMMENDED CITATION

(example for Detailed Bedrock Geology downloaded database)

Newfoundland and Labrador Geological Survey. "Detailed Bedrock Geology." Newfoundland and Labrador GeoScience Atlas OnLine. Last update: January 2013. https://geoatlas.gov.nl.ca/ . [fill in date downloaded].

CONTACT

For further information please contact:

Loretta Crisby-Whittle
Project Geologist
Geological Survey Division, Mining and Mineral Development Branch
Government of Newfoundland and Labrador
P.O. Box 8700,
St. John's, NL A1B 4J6
t. (709) 729-2166
Email: lorettacrisbywhittle@gov.nl.ca
General Email: GeoscienceOnline@gov.nl.ca

(Help File updated: April 2023)
(Database updated: check the What's New file)

CONTENTS: