Figure 2. A portion of the Maine Geological Survey Surficial Geology map of South Portland. The beach and dunes are represented (in a general sense) by the Holocene marine sand (Hms) unit. The surrounding sediments include the glaciomarine Presumpscot Formation (Pp) that is only a very thin layer over bedrock in the hachured areas. Marine nearshore deposits (Pmn) and artificial fill (af) are two other map units in the upland area. More details can be found by reading the full map and legend on the MGS web site (Bernotavicz, 1999 - pdf format).
Last updated on February 21, 2006