Metadata: 3D hydrostatigraphic model of the Oak Ridges Moraine and Greater Toronto Area

Metadata NAP : more info

Identification

Abstract

The model was developed under the Geologcial Survey of Canada's NATMAP (National Mapping Program) and Groundwater Program in collaboration with partner agencies (e.g., Ontario Geological Survey, Ontario Ministry of the Environment, Ontario Ministry of Natural Resources, Conservation Authorities Moraine Coalition). The model consists of a series of gridded surfaces that define the top and bottom of 5 Quaternary stratigraphic units plus bedrock surface. The modelled units are, stratigraphically from oldest to youngest: 1) Paleozoic bedrock (B/R), 2) Lower sediment (LS), 3) Newmarket Till (NT), 4) Oak Ridges Moraine and channel sediment (OMR), 5) Halton Till (HT), and 6) Glaciolacustrine and Recent sediment (GL/R).

Status:

completed

Title

3D hydrostatigraphic model of the Oak Ridges Moraine and Greater Toronto Area

Date

2005-12-01 ( register

publication)

Date

2005-12-01 ( register

creation)

Edition

Edition date

Citation group

principalInvestigator

Name

Charles Logan

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada

Position

GIS Specialist

Information

Address	Delivery point : 601 Booth Street 601 Booth Street City : Ottawa Ottawa Administrative region : Ontario Ontario Postal code : Country : Canada Canada Email charles.logan@canada.ca
Telephone	voice; 1 (613) 9477068
Online Resource

Citation group

originator

Name

Charles Logan

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Central Canada

Position

GIS Specialist

Information

Address	Delivery point : 601 Booth Street 601 Booth Street City : Ottawa Ottawa Administrative region : Ontario Ontario Postal code : Country : Canada Canada Email charles.logan@canada.ca
Telephone	voice; 1 (613) 9477068
Online Resource

Citation group

custodian

Name

Francois Letourneau

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec

Position

Information

Address	Delivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage City : Québec Québec Administrative region : Québec Québec Postal code : Country : Canada Canada Email francois.letourneau@canada.ca
Telephone	voice; 1 (418) 6543826
Online Resource

Citation group

pointOfContact

Name

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada

Position

Information

Address	Delivery point : City : Administrative region : Postal code : Country : Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
Online Resource

Presentation form

modelDigital

Series

Open File5062

Related publication

Logan, C., Russell, H.A.J., and Sharpe, D.R. 2005: Regional 3-D Structural Model of the Oak Ridges Moraine and Greater Toronto Area, southern Ontario: Version 2.1; Geological Survey of Canada, Open File 5062, 1 CD-ROM.

Goals

A central focus of the joint Geological Survey of Canada / Ontario Geological Survey Oak Ridges Mo-raine (ORM) Project was to update the Quaternary geological map coverage of the Greater Toronto Area (GTA) and construct a 3-D geological model of the strata. The updated mapping and 3-D model along with numerous publications detailing aspects of the conceptual geological understanding were intended to provide regional context for more detailed, site-specific studies.

Keyword(s)

Thesaurus

Title

NRCan - GSC - Hydrogeology - Thesaurus

Date

2009-01-01 ( register

creation)

Date

2016-12-01 ( register

publication)

Edition

Edition date

Citation group

custodian
Name
Organisation	Government of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information

Type

place

Term

Greater Toronto Area

Thesaurus
Type
Term	Groundwater

Thesaurus
Type
Term	Aquifer

Thesaurus

Title

NRCan - GSC - Hydrogeology - Thesaurus

Date

2009-01-01 ( register

creation)

Date

2016-12-01 ( register

publication)

Edition

Edition date

Citation group

custodian
Name
Organisation	Government of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information

Type

theme

Term

Quaternary

Thesaurus

Title

NRCan - GSC - Hydrogeology - Thesaurus

Date

2009-01-01 ( register

creation)

Date

2016-12-01 ( register

publication)

Edition

Edition date

Citation group

custodian
Name
Organisation	Government of Canada; Natural Resources Canada; Geological Survey of Canada
Position
Information

Type

product

Term

3D Model

Spatial representation	grid
Resolution
Language	eng; CAN
Character encoding	utf8
Thematic category	geoscientificInformation
Extent	-80.165400000,43.240900000;-77.723000000,44.530400000
Supplemental information	Each unit has a companion confidence map that is based on the proximity to, and relative quality of data control points that were used to interpolate its surface.

Distribution

Specific information related to data distribution

Format
Name	ASCII GRID
Version	not applicable

Distributor

Contact

distributor

Name

Eric Boisvert

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec

Position

Information

Address	Delivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage City : Québec Québec Administrative region : Québec Québec Postal code : Country : Canada Canada Email eric.boisvert2@canada.ca
Telephone	voice; 1 (418) 6543705
Online Resource

Distributor

Contact

pointOfContact

Name

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada

Position

Information

Address	Delivery point : City : Administrative region : Postal code : Country : Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
Online Resource

Transfer options

Quality

Quality description scope : register

dataset

Lineage

Message Date lineage
Lineage is the description of the sources and steps used to create the current dataset.

Introduction
Stratigraphy definition 3D model creation

Process step

Sources

The 3-D model is a rendering of the Quaternary sediment that comprises the complex aquifer/aquitard complex of the Oak Ridges Moraine and Greater Toronto Area, southern Ontario. The Quaternary sediment in this study area is categorized into 5 stratigraphic units. From oldest to youngest these units are: 1) Lower sediment (LS) The LS unit is actually a grouping of several pre-Late Wisconsinan formations. 2) Newmarket Till (NT) Dense stony silty sandy diamicton. This till sheet is 5-30 m thick. The till is a reliable regional subsurface marker horizon. 3) Oak Ridges Moraine and channel sediment (ORM) The ORM is an extensive stratified deposit, ~160 km long, 5-15 km wide and of variable thickness. ORM ridges formed during a rapidly deposited sequence of high-energy, west-flowing meltwater events. Subglacial. 4) Halton Till (HT) Halton sedimentary architecture and facies are interpreted as deposition in an ice-marginal or subglacial lake bounded by Niagara Escarpment, ORM, and grounding line. Large volumes of transported mud are distal equivalents of ORM gravelly sand deposits to the east. Glaciolacustrine sedimentation is indicated by mud-rich texture and laminations. 5) Glaciolacustrine and Recent sediment (GL/R). Thin deposits of sand, silt and clay are found related to a series of lake levels. As water levels fell to Lake Ontario levels, rivers incised deeper, leaving raised terraces and creating new floodplains.

Surficial geological map. Archival well records. Geophysical data.

The modelling process consists of 4 main steps: i) data preparation, ii) training surface construction, iii) final surface construction, and iv) confidence grid construction. The majority of effort in each of the first 3 steps involves the incremental development of a set of 5 stratigraphic datasets that are interpolated to serve as the basis for subsequent steps. The Natural Neighbour method in MapInfo Professional® with Vertical Mapper™ was used for surface interpolations. In the final step, a semi-quantitative confidence grid was constructed to indicate the level of data support for each modelled surface.

Surface geology map at 1:50 000 scale. 4700 archival boreholes and test pits from OGS regional mapping, geotechnical engineering reports (e.g., foundation studies) and hydro-geological site investigations. 31 continuously cored boreholes. ~50 line-kilometers of seismic reflection data. Over 9,000 field mapping sites. Over 60,000 provincial water well records were obtained and incorporated into the modelling process. In lesser-developed areas, water well records often provided the only source of sub-surface information for several kilometers. An invaluable source of hydrogeological data, the water well database was, however, used with caution due to issues of data quality, reliability, and resolution (Russell et al., 1998).

Technical details and constraints

File identifier	8e5e762e-c1c3-18e4-4c5f-662234f90e44
Language	eng; CAN
Character encoding	utf8
Hierarchical classification	dataset
Date	2017-10-27
Metadata standard	North American Profile of ISO 19115:2003 - Geographic information - Metadata
Version	CAN/CGSB-171.100-2009
Constraints
Update frequency	asNeeded

Regionalisation

Metadata are available in those languages (You can use language menu item in the top menu bar to switch language):

Language code	Pays	Encodage
French	Canada	utf8

Geographic Reference System

Reference System code	EPSG:26917
Register	http://www.epsg-registry.org/
Version	6.14

Metadata Contact

pointOfContact

Name

Francois Letourneau

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada - GSC Quebec

Position

Information

Address	Delivery point : 490, rue de la Couronne, 3e étage 490, rue de la Couronne, 3e étage City : Québec Québec Administrative region : Québec Québec Postal code : Country : Canada Canada Email francois.letourneau@canada.ca
Telephone	voice; 1 (418) 6543826
Online Resource

pointOfContact

Name

Organisation

Government of Canada; Natural Resources Canada; Geological Survey of Canada

Position

Information

Address	Delivery point : City : Administrative region : Postal code : Country : Email nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca
Telephone
Online Resource