Home | Place | Keyword | About

Dataset: Generalized Geology of the World: Precambrian Age and Rock Type Domains

Last update2013-10-03T08:21:05Z
TitleGeneralized Geology of the World: Precambrian Age and Rock Type Domains
AbstractThis theme comprises a choropleth or patchwork map depicting generalized Precambrian (pre-545 Ma) bedrock domains against a backdrop of unclassified post-Precambrian domains. The Precambrian is subdivided into Neoproterozoic, Mesoproterozoic, Paleoproterozoic, and Archean. The last, oldest subdivision is further subdivided where possible into Neoarchean, Mesoarchean, Paleoarchean, and, rarely, Eoarchean. This theme was derived by sequentially querying the Generalized Geology of the World (GGW) rock unit database housing age and rock type information in the detail reflective of the small scale (approximately1:5 million scale) data source map legends. Simplified attributes were attached to a copy of the GGW vector data and classified based on the query results, and boundaries for adjacent source domains that were classified to identical values were removed. The resulting simplified data set includes the four descriptive attributes: eon range (very general age), era range (age), predominant rock type(s), and combined era range and predominant rock type(s) for Precambrian rocks.

The level of spatial generalization is geared to global visualization. This data set is spatially inaccurate. The accuracy of some of the map data sources may be poor, and therefore intricate detail from relatively accurate sources was deliberately removed in the source data set for the sake of consistency. The attributes extracted from the full GGW dataset rely on the legends of source maps and accessibility of appropriate details in literature sources.
KeywordsGeoscientificInformation, Geological and geophysical, Precambrian, Neoproterozoic, Mesoproterozoic, Paleoproterozoic, Archean, Neoarchean, Mesoarchean, Paleoarchean, rock type
Distance unit of measuredegrees

Service: World Mineral Deposits

Last update2013-10-03T08:21:04Z
TitleWorld Mineral Deposits
AbstractMineral deposits are natural accumulations of one or more useful minerals that may provide society with metallic or non-metallic raw materials. The Geological Survey of Canada has been compiling databases for major metallic mineral deposits on Canada-wide and world-wide scale over a three decade period. The most recent compilation was enabled by industry-sponsored World Map and World Minerals Geoscience Database Projects. Global databases for seven important metallic deposit types: lode gold, porphyry-related, nickel-platinum group-chromite, sedimentary exhalative lead-zinc, Mississippi Valley-type zinc-lead, iron oxide-copper-gold (IOCG), and sediment-hosted copper deposits are now available On-Line. Five easy-to-use thematic world geology datasets provide generalized geological context for the global databases.
CreatorLesley B. Chorlton
PublisherMineral Resources Division, Geological Survey of Canada
ContributorLesley B. Chorlton
OrganizationLesley B. Chorlton
Distance unit of measuredegrees
Service typeOGC:WMS
Service type version1.1.1
OperationsGetCapabilities, GetMap, GetFeatureInfo, DescribeLayer, GetLegendGraphic
Coupling typetight
Operates onGSC:WORLD_MineralDeposits, GSC:WORLD_SedCuDeposits, GSC:WORLD_MaficDomains, GSC:WORLD_AgeDomains, GSC:WORLD_FeOxDeposits, GSC:WORLD_MVTDeposits, GSC:WORLD_NiPGECrDeposits, GSC:WORLD_PrecambrianDomains, GSC:WORLD_FelsicDomains, GSC:WORLD_AgeRockDomain, GSC:WORLD_PorphyryDeposits, GSC:WORLD_SedexDeposits, GSC:WORLD_AuDeposits, GSC:WORLD_FaultZones