/* DATA DESCRIPTION: Citation: Waqas, Atif; Neumeier, Urs; Rochon, André (2020): Seasonal and spatial distributions of grain size and organic matter content across an intertidal area at St. Lawrence Estuary, Canada [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.921409 Abstract: Grain size distribution and organic matter content (loss on ignition) of surface scrape sediments were analyzed in summer 2016, autumn 2017, and summer 2018 at Nazareth tidal flat and marsh located west of Rimouski on the southern shore of Lower St. Lawrence Estuary (Canada). Surface sediment samples for analysis of grain size and organic matter content were collected at each site within 1 m radius of CSM measurements using a spatula to scrape the top 2-3 cm of sediments. The combustible organic matter content (loss on ignition, LOI) of the surface sediments was determined after: (1) drying at 60°C for 24 h until no weight change occurred; (2) placing in oven at 450°C for 16 h. For grain size analysis, the coarse and the fine grain size distributions were processed with Gradistat (Blott and Pye, 2001) to compute median grain size (d50), mean grain size, and sorting using the geometric moment method. The sorting is calculated similarly to a standard deviation. Cross-shore transect B was sampled in November 2017 for which, the data is presented here. The data for summer 2016, summer 2017, and summer 2018 was published in the context of annual variations in sediment biostabilization (Waqas et al., 2019, doi:10.1594/PANGAEA.911771) Keyword(s): Grain Size; Intertidal cohesive sediments; organic matter Related to: Waqas, Atif; Neumeier, Urs; Rochon, André (2020): Seasonal changes in sediment erodibility associated with biostabilization in a subarctic intertidal environment, St. Lawrence Estuary, Canada. Estuarine, Coastal and Shelf Science, 245, 106935, https://doi.org/10.1016/j.ecss.2020.106935 Waqas, Atif; Neumeier, Urs; Rochon, André (2020): Spatial and annual patterns of grain size and organic matter content in an intertidal area, St. Lawrence Estuary, Canada [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.911771 Coverage: MEDIAN LATITUDE: 48.445910 * MEDIAN LONGITUDE: -68.566481 * SOUTH-BOUND LATITUDE: 48.442337 * WEST-BOUND LONGITUDE: -68.569150 * NORTH-BOUND LATITUDE: 48.450708 * EAST-BOUND LONGITUDE: -68.564470 MINIMUM ELEVATION: -0.9 m * MAXIMUM ELEVATION: 2.3 m Event(s): St.Lawrence_B1 (B1) * LATITUDE: 48.442337 * LONGITUDE: -68.564470 * ELEVATION: 2.3 m * LOCATION: St. Lawrence Estuary, lower * METHOD/DEVICE: Multiple investigations (MULT) St.Lawrence_B2 (B2) * LATITUDE: 48.442965 * LONGITUDE: -68.564915 * ELEVATION: 1.6 m * LOCATION: St. Lawrence Estuary, lower * METHOD/DEVICE: Multiple investigations (MULT) St.Lawrence_B3 (B3) * LATITUDE: 48.443752 * LONGITUDE: -68.565270 * ELEVATION: 0.5 m * LOCATION: St. Lawrence Estuary, lower * METHOD/DEVICE: Multiple investigations (MULT) St.Lawrence_B4 (B4) * LATITUDE: 48.444594 * LONGITUDE: -68.565702 * ELEVATION: 0.4 m * LOCATION: St. Lawrence Estuary, lower * METHOD/DEVICE: Multiple investigations (MULT) St.Lawrence_B5 (B5) * LATITUDE: 48.445453 * LONGITUDE: -68.566278 * ELEVATION: 0.0 m * LOCATION: St. Lawrence Estuary, lower * METHOD/DEVICE: Multiple investigations (MULT) St.Lawrence_B6 (B6) * LATITUDE: 48.446282 * LONGITUDE: -68.566681 * ELEVATION: -0.2 m * LOCATION: St. Lawrence Estuary, lower * METHOD/DEVICE: Multiple investigations (MULT) St.Lawrence_B7 (B7) * LATITUDE: 48.447866 * LONGITUDE: -68.567533 * ELEVATION: -0.5 m * LOCATION: St. Lawrence Estuary, lower * METHOD/DEVICE: Multiple investigations (MULT) St.Lawrence_B8 (B8) * LATITUDE: 48.449233 * LONGITUDE: -68.568327 * ELEVATION: -0.7 m * LOCATION: St. Lawrence Estuary, lower * METHOD/DEVICE: Multiple investigations (MULT) St.Lawrence_B9 (B9) * LATITUDE: 48.450708 * LONGITUDE: -68.569150 * ELEVATION: -0.9 m * LOCATION: St. Lawrence Estuary, lower * METHOD/DEVICE: Multiple investigations (MULT) Parameter(s): Event label (Event) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) Latitude of event (Latitude) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) Longitude of event (Longitude) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) Elevation of event [m] (Elevation) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) Campaign (Campaign) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) Gravel [%] (Gravel) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) * METHOD/DEVICE: CamsizerXT (Retsch Technology), statistical analysis GRADISTAT package (Blott and Pye, 2001) (URI: https://doi.org/10.1002/esp.261) Sand [%] (Sand) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) * METHOD/DEVICE: CamsizerXT (Retsch Technology), statistical analysis GRADISTAT package (Blott and Pye, 2001) (URI: https://doi.org/10.1002/esp.261) Silt [%] (Silt) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) * METHOD/DEVICE: CamsizerXT (Retsch Technology), statistical analysis GRADISTAT package (Blott and Pye, 2001) (URI: https://doi.org/10.1002/esp.261) Clay minerals [%] (Clay min) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) * METHOD/DEVICE: CamsizerXT (Retsch Technology), statistical analysis GRADISTAT package (Blott and Pye, 2001) (URI: https://doi.org/10.1002/esp.261) Grain size, mean [µm] (Grain size mean) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) * METHOD/DEVICE: Geometric method of moments Median, grain size [µm] (D50) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) Sorting (Sort) * PI: Waqas, Atif (https://orcid.org/0000-0002-6160-0961, atifwqs@hotmail.com) * METHOD/DEVICE: Geometric method of moments License: Creative Commons Attribution 4.0 International (CC-BY-4.0) (URI: https://creativecommons.org/licenses/by/4.0/) Size: 72 data points */ Event Latitude Longitude Elevation [m] Campaign Gravel [%] Sand [%] Silt [%] Clay min [%] Grain size mean [µm] D50 [µm] Sort St.Lawrence_B1 48.4423 -68.5645 2 Autumn 2017 0.000000000 0.042973005 94.909422740 5.047604250 15.41 19.25 2.72 St.Lawrence_B2 48.4430 -68.5649 2 Autumn 2017 0.902985547 13.987191300 70.270656700 14.839166460 14.19 16.30 5.77 St.Lawrence_B3 48.4438 -68.5653 0 Autumn 2017 0.785358534 5.485339883 67.973101810 25.756199770 6.40 5.66 5.32 St.Lawrence_B4 48.4446 -68.5657 0 Autumn 2017 11.190605270 36.075421750 45.859389080 6.874583904 69.90 49.91 9.84 St.Lawrence_B5 48.4455 -68.5663 0 Autumn 2017 3.279518207 55.156681580 35.259496790 6.304303419 65.64 90.08 6.57 St.Lawrence_B6 48.4463 -68.5667 -0 Autumn 2017 1.215297123 31.753876160 53.562071220 13.468755490 23.38 33.21 7.27 St.Lawrence_B7 48.4479 -68.5675 -1 Autumn 2017 1.866960475 40.293541080 48.320664930 9.518833517 33.44 37.29 7.41 St.Lawrence_B8 48.4492 -68.5683 -1 Autumn 2017 7.402105214 75.436279720 14.737441590 2.424173480 190.70 226.41 5.67 St.Lawrence_B9 48.4507 -68.5692 -1 Autumn 2017 6.891495601 80.777383100 9.749593421 2.581527880 229.30 258.11 5.13