Abstract

Investigation of leveling-circuit misclosures indicates the presence of an unconnected systematic error in one of the critical surveys previously used to define rapid contemporary subsidence along the coast of Maine. Reanalysis of the leveling observations after removing the suspect survey continues to indicate subsidence of easternmost Maine relative to points farther inland; however, the average rate of subsidence is reduced from 9 mm/yr, reported by Anderson et al., to about 1–2 mm/yr. This rate is similar to that derived from the East-port, Maine, tide gauge, assuming a 1.0–1.5 mm/yr “eustatic” rise in sea level. In addition, a subsidence rate of 1–2 mm/yr is roughly consistent with longer term (a few thousand years) rates derived from glacial-marine deltas and from dated basal peats along the Maine coast.

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