Layer: Probability of Sand (ID: 2)

Name: Probability of Sand

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Description: These layers display the sampling points and outputs of geostatistical models that estimate the probability of five geologic and one biogenic substrate types being present at a 250 m resolution. The models leveraged two large data sets: the University of Massachusetts – School for Marine Science and Technology (SMAST) drop camera survey (242,949 samples, 2003 to 2019) and the US Geological Survey databases (27,784 samples, 1966 to 2011), which were combined to derive sea floor surficial substrate probability maps for the Northeastern US continental shelf from Virginia Beach to the Gulf of Maine to 300 m depth (218,571 km^2). <br/> <br/> The modeling methods and results are presented in Anticipating the winds of change: A baseline assessment of Northeastern US continental shelf surficial substrates, published in the journal Fisheries Oceanography in 2024 by Kevin D.E. Stokesbury, N. David Bethoney, Felipe Restrepo, and Bradley P. Harris. The authors found that mud was present in 72% of all the grid cells. Sand and shell debris are ubiquitous, present in 94% and 93% of all grid cells, respectively. Gravel clearly defines the glacier moraine along the northern edge of Georges Bank leading into the Gulf of Maine coastline. Gravel deposits were also associated with major rivers, estuaries, canyons, and sea mounts. Gravel was present in 27% of all the grid cells. Cobble and rock occur along the glacier moraine on Georges Bank and sea mounts in the Gulf of Maine but cover a much smaller area than gravel. Cobble and rock were present in 4% and 3% of all the grid cells, but rarely found in the Mid-Atlantic. <br/> <br/> Read the full open-access publication at <a href='https://doi.org/10.1111/fog.12693' target='_blank'>https://doi.org/10.1111/fog.12693</a>.

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Copyright Text: Stokesbury et al. 2024, https://doi.org/10.1111/fog.12693

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