Silurian-Lower Devonian stratigraphy of eastern and south-central New Hampshire; extensions from western Maine

A6: Stratigraphic and Structural Traverse of Mount Moriah and the Wild River Wilderness Area

“…Although Billings & others (1941Billings & others ( , 1946Billings & others ( , 1975Billings & others ( , 1979 did not recognize the stratigraphic sequence as it is now understood (Hatch et al, 1983), they did recognize some of the important lithologies upon which the modern lithostratigraphic sequence is based. Thus their maps provide a useful starting point for work in this region.…”

“…Units include the Silurian Rangeley, Perry Mountain, Smalls Falls, and Madrid Formations, as well as the Devonian Littleton Formation. The Perry Mountain Formation had not previously been recognized in much of this area (Hatch et al, 1983;Hatch & Wall, 1986). The metamorphism of these rocks is discussed elsewhere (trip C6 of this volume; Allen 1992Allen , 1996b.…”

“…Thus their maps provide a useful starting point for work in this region. All of the rocks previously assigned to the Devonian Littleton Formation (Billings & Fowler-Billings, 1975), are here subdivided into a Siluro-Devonian lithostratigraphy similar to that now recognized elsewhere in New Hampshire and western Maine, based on correlations made by Hatch et al, (1983). Units include the Silurian Rangeley, Perry Mountain, Smalls Falls, and Madrid Formations, as well as the Devonian Littleton Formation.…”

“…Since the time of Billings' maps, however, further developments have been made in understanding the litho-stratigraphy of Siluro-Devonian metasedimentary rocks throughout New Hampshire and western Maine (Osberg et al, 1985;Moench & Pankiwskyj, 1988;Lyons et al, 1991). Attempts to apply the new lithostratigraphy to this region met with limited success, particularly in the migmatites that make up the Carter-Moriah and Wild River area (CM-WR; Hatch et al, 1983;Hatch & Moench, 1984;Hatch & Wall, 1986). The CM-WR area is shown on current maps as "undifferentiated sedimentary rocks in areas of extreme migmatization" (Osberg et al, 1985;Lyons et al, 1991).…”

Devonian Granite Melt Transfer in Western Maine: Relations Between Deformation, Metamorphism, Melting and Pluton Emplacement at the Migmatite Front

“…Stratigraphic units are defined in the western Maine area (Figure 2; Moench and Boudette, 1970), and have been extended across most of the New England Appalachians (e.g. Hatch et al, 1983).…”