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Seabed grain size analyses, offshore Canada Grain size is the most fundamental physical property of sediment, and these data are widely used in a variety of applications in science. Marine expeditions of the Geological Survey of Canada have been collecting grain size information on seabed and sub-seabed samples for over 50 years. Results have been recorded at 5th phi midpoints since the early 1990's in contrast to the earlier full, half or quarter phi interval end point values. Users of high resolution data must note that the sum of %Silt and %Clay equals the total %Mud makeup and that %Gravel, %Sand, %Silt and %Clay sum to 100%. Summary statistics include percentages of gravel, sand, silt, clay and mud as well as mean, kurtosis, skewness and standard deviation. The quality of these data varies. Results should be used with some caution as they may not be fully representative of seabed grainsize, particularly in areas of sandy and coarser sediment (e.g., sand and mud can leak out of the sampler during recovery). Canada makes no representation or warranty of any kind with respect to the accuracy, usefulness, novelty, validity, scope, completeness or currency of the data and expressly disclaims any implied warranty of merchantability or fitness for a particular purpose of the data. For the purpose of the web mapping service, grain size data are sorted by the expedition id. Coarse and detailed grain size distribution plots are shown when a point is chosen. If the sample contains more that one sub-sample ( e.g., as with a piston core sequence), the grain size plots are stacked in the display window from the top of the core downwards. 2020-02-21 2020-05-19 Natural Resources Canada nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca Form DescriptorsNature and EnvironmentScience and Technologysedimentgrab samplerseafloor texturemarine sedimentmarine geologycorergeologyocean bottomGeologyOcean floorSediments Seabed grain size analyses, offshore Canada - EnglishESRI REST https://webservices.maps.canada.ca/arcgis/rest/services/NRCan/GSC_Grain_Size_Analyses/MapServer Seabed grain size analyses, offshore Canada - FrenchESRI REST https://servicesweb.cartes.canada.ca/arcgis/rest/services/NRCan/CGC_Analyses_Granulometriques/MapServer Seabed grain size analyses, offshore Canada - EnglishFGDB/GDB http://ftp.maps.canada.ca/pub/nrcan_rncan/Geology_Geologie/GSC_Grain_Size-CGC_Granulometrie Seabed grain size analyses, offshore Canada - FrenchFGDB/GDB http://ftp.cartes.canada.ca/pub/nrcan_rncan/Geology_Geologie/GSC_Grain_Size-CGC_Granulometrie WMS Service - Seabed grain size analyses, offshore Canada - EnglishWMS https://webservices.maps.canada.ca/arcgis/services/NRCan/GSC_Grain_Size_Analyses/MapServer/WMSServer?service=WMS&version=1.3.0&request=GetCapabilities WMS Service - Seabed grain size analyses, offshore Canada - FrenchWMS https://servicesweb.cartes.canada.ca/arcgis/services/NRCan/CGC_Analyses_Granulometriques/MapServer/WMSServer?service=WMS&version=1.3.0&request=GetCapabilities

Seabed grain size analyses, offshore Canada

Grain size is the most fundamental physical property of sediment, and these data are widely used in a variety of applications in science. Marine expeditions of the Geological Survey of Canada have been collecting grain size information on seabed and sub-seabed samples for over 50 years. Results have been recorded at 5th phi midpoints since the early 1990's in contrast to the earlier full, half or quarter phi interval end point values. Users of high resolution data must note that the sum of %Silt and %Clay equals the total %Mud makeup and that %Gravel, %Sand, %Silt and %Clay sum to 100%. Summary statistics include percentages of gravel, sand, silt, clay and mud as well as mean, kurtosis, skewness and standard deviation. The quality of these data varies. Results should be used with some caution as they may not be fully representative of seabed grainsize, particularly in areas of sandy and coarser sediment (e.g., sand and mud can leak out of the sampler during recovery). Canada makes no representation or warranty of any kind with respect to the accuracy, usefulness, novelty, validity, scope, completeness or currency of the data and expressly disclaims any implied warranty of merchantability or fitness for a particular purpose of the data. For the purpose of the web mapping service, grain size data are sorted by the expedition id. Coarse and detailed grain size distribution plots are shown when a point is chosen. If the sample contains more that one sub-sample ( e.g., as with a piston core sequence), the grain size plots are stacked in the display window from the top of the core downwards.

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Resource Name Resource Type Format Language Links
Seabed grain size analyses, offshore Canada - English Web Service ESRI REST English Access
Seabed grain size analyses, offshore Canada - French Web Service ESRI REST French Access
Seabed grain size analyses, offshore Canada - English Dataset FGDB/GDB English Access
Seabed grain size analyses, offshore Canada - French Dataset FGDB/GDB French Access
WMS Service - Seabed grain size analyses, offshore Canada - English Dataset WMS English Access
WMS Service - Seabed grain size analyses, offshore Canada - French Dataset WMS French Access

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Electronic Mail Address: nrcan.gsc-geosciencedata-donneesgeoscience-cgc.rncan@canada.ca