Topic ID #35683 - posted 5/6/2015 12:54 PM

Prehistoric Shoreline Data



diginit


Does anyone know where I can find GIS layers for the former shorelines from the peak glacial periods?  Specifically the early Holocene shorelines for Long Island and Metro NYC?  I am having a hard time finding anything.




Post ID#20666 - replied 5/7/2015 7:57 AM



diginit


Also looking for around 5kbp when sea level rise slowed.

Post ID#20667 - replied 5/13/2015 9:17 PM



lunagolya

Generally, there are 2 steps involved. First, you need to generate bathymetric data for the Atlantic. Second, you use a published sea level curve or sea level rise model to create shorelines for your time periods of interest. For a coarse Late Pleistoce/Holocene model I've used the NOAA ETOPO1 one-Arc minute data set to create bathymetric data for the East Coast. I'd have to track down the sea level curve model I used. I may also have a finer scale bathymetric dataset at the office.

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