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THREAD. Once upon a time .... see those long pale strips w/ dark outlines leading from the fore- into the middle-ground of the photo? Hold onto your hats: #RomanoBritish #peat diggings close to then coast line & now in the Cambs #fens, dug before the mid-3rdC AD. 
2. A major flood from the sea in the mid-3rdC filled these #RomanoBritish peat diggings w/ the light-coloured silt you can see in the photo. Now the peat wetlands they were part of have disappeared except for their dark outlines. They’re top L of the central blue block on the map
The map is from eaareports.org.uk/publication/re…, one of the iconic Fenland Survey volumes all available for free download.
