Color key to the series of unfinished study of Ice Formation along Atlantic Coast. Blue shading indicates "Local formation", Pink shading indicates " Drifting Ice" while purple (blue+pink) shading exhibits "Local Formation and Drifting Ice."
Image ID: cgs05315, NOAA's Historic Coast & Geodetic Survey (C&GS) Collection Photo Date: 1848-1874 Credit: NARA C&GS Colllection Category: Coast and Geodetic Survey/Archive/ • High Resolution Photo Available
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