Two-mica granite of the Sebago batholith and Effingham pluton of eastern New Hampshire.
(Winnipesaukee Quartz Diorite of Billings, 1955) - Gray, massive to foliated tonalite and minor quartz diorite, granodiorite, and granite. Probably coeval with Spaulding Tonalite.
Typically pink, coarse-grained mesoperthitic biotite (amphibole-free) granite; locally fine-grained or porphyritic.
Gray metapelite and metawacke and subordinate metavolcanic rocks; generally, but not everywhere, conformable with underlying Fitch or Madrid Formations. Fossiliferous in western New Hampshire.
Mount Osceola Granite, Granite containing hornblende and, locally, hastingsite, ferrohedenbergite, or fayalite.
Perry Mountain and Rangeley Formations, undivided.
Pink Conway-type granite of Kingsley (1931).
Gray, thinly laminated (5-25 mm) metapelite with local lentils of turbidites and thin quartz conglomerates in western New Hampshire. Sparse calc-silicate pods and coticule. Probably equivalent to member B of Rangeley Formation of Maine.
(Kinsman Quartz Monzonite of Billings, 1955) - Foliated granite, granodiorite, tonalite, and minor quartz diorite; large megacrysts of potassium feldspar characteristic; garnet locally abundant.
Formations unidentifiable owing to obliteration of original sedimentary or volcanic characteristics by anatexis or by numerous intrusions.
Porphyritic hornblende or alkalic amphibole quartz syenite.
Includes some ignimbritic caldera-fill and minor intrusive rocks (part of Ossipee Mountain Complex of Kingsley, 1931); also some aphanitic gray, black, or tan quartz-feldspar porphyry.
Rangeley Formation, undivided.
Bedded and ignimbritic tuffs, flows, and breccias; also porphyritic rhyolite and minor trachyte.
Very rusty weathering, thinly bedded sulfidic-graphitic schist and pyrrhotitic calc-silicate granofels. Eastern facies equivalent to lower part of the Fitch Formation. Locally mapped as Francestown Formation of Nielson (1981) in southern New Hampshire.
Gray and fine-grained; possibly belonging to the Sebago batholith.
Probably equivalent to Patch Mountain Member of the Sangerville Formation (Llandoverian and Wenlockian) of central Maine.
Hornblende or alkalic amphibole quartz syenite.
Madrid and Smalls Falls Formations, undivided.
Massive to weakly foliated, purple biotite-feldspar granofels, layered calc-silicate, and dark pelitic-sulfidic schist containing calc-silicate pods in upper member; an eastern facies equivalent to the upper part of the Fitch Formation. Locally mapped as the Warner Formation of Nielson (1981) in southern New Hampshire.
Alkalic amphibole or fayalite may be present. Part of Ossipee Mountain Complex of Kingsley (1931).
Sharply interbedded quartzites, light-gray nongraphitic metapelite, and "fast-graded" meta-turbidites. Coticule layers common.
Black, chiefly massive to porphyritic. Includes minor rhyolitic ignimbrite and andesitic tuff. Part of Ossipee Mountain Complex of Kingsley (1931)
Mount Osceola Granite, Green biotite mesoperthitic granite.
Rusty-weathering, pelitic schist, metasandstone, and local coarse-grained metasandstone lentils; calc-silicate pods common; minor coticule. Probably equivalent to member C of Rangeley Formation of Maine.
Granite containing phenocrysts of smoky quartz and microperthite; alkalic amphibole, hornblende, and hedenbergite or fayalite may be present. "Mount Lafayette" type granite porphyry of Billings (1955).
Hastingsite or hornblende and (or) hedenbergite are present.
Found at Red Hill in Mt. Chocorua quadrangle (see index accompanying ""Sources of Map Data"").
Contains riebeckite and (or) hastingsite.
Similar to Concord Granite.
Hornblende (or alkalic amphibole) syenite.
Fine- to coarse-grained.
Devonian - Silurian Rindgemere Formation lower member
Medium-grained mesoperthitic granite containing riebeckite and (or) hastingsite.
Commonly porphyritic and mesoperthitic; contains biotite and, locally, fayalite, hastingsite, hornblende, or ferrohedenbergite.
Leucocratic, pink or light-brown, and mesoperthitic.
Jurassic granite - Jurassic biotite granite undivided
Gray two-mica granite, locally grading to tonalite.
Pink to gray; hastingsite or riebeckite in some varieties.
Devonian - Silurian undifferentiated sedimentary rocks in areas of extreme migmatization