Figure 1. A portion of a regional geologic map by Moench and others (1995) that shows the general distribution of rock units in the area. Rocks of Silurian age are shown in various shades of green with the older rocks generally toward the northwest. The unit labeled Ssf is the Smalls Falls Formation which will be the focus of this discussion. Sp is the Perry Mountain formation, a mix of thick quartzite and schist. Units beginning with Sr are members of the Rangeley Formation. Various Devonian units, younger than the Smalls Falls Formation, are shown in blue shades and have labels beginning with D. The pink blobs on this map are younger Devonian intrusions of granite and related rocks.
Last updated on October 6, 2005