By John B. Lyons, Wallace A. Bothner, Barry L. Doolan, Norman L. Hatch, Robert H. Moench, Rolfe Stanley(auth.)

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Published through the yank Geophysical Union as a part of the Field journey Guidebooks Series.

This traverse around the Northern Appalachians from the environs of Burlington, Vt. to Portsmouth, N.H. (fig. 1) demonstrates a geology which displays the subsequent tectono-metamorphic and/or magmatic occasions: 1) Grenvillian (Precambrian Y) orogeny, top visible within the Adirondack Mountains of northeastern big apple, but in addition obvious within the cores of the golf green Mountain and Lincoln massifs of west-central Vermont and the Chester-Athens and Sadawga-Rayponda domes of southeastern Vermont; 2) Avalonian (Precambrian Z) orogeny, evidenced by means of the Massabesic Gneiss and comparable rocks of southeastern New Hampshire; three) Taconian (Mid-Ordovician) tectonism and metamorphism (the Taconic Mountains of western Vermont and japanese big apple lie instantly south of our line of traverse); four) Acadian orogeny (Early to center Devonian) - in actual fact the main tectonic, magmatic, and metamorphic occasion during this area, and most sensible illustrated via geologic family in New Hampshire and Maine; and five) Mesozoic rifting, followed through the emplacement of ring-dikes and shares of the White Mountain (Jurassic and Cretaceous) plutonic-volcanic complexes, mainly in New Hampshire (figs. 2 and 3). to not be noticeable are a few Mississippian (325 Ma.) plutons of japanese New Hampshire and western Maine, and a Permian (275 Ma.) intrusive of south-central New Hampshire. The latter age is exciting, since it is similar to that of granite slicing the Carboniferous (Westphalian) Narragansett Basin of southeastern New England, which used to be deformed and metamorphosed throughout the Alleghenian orogeny.

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Additional resources for A Transect Through the New England Appalachians: Burlington, Vermont to Durham, New Hampshire July 2-8, 1989

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Orogen. This suggests the outcrop lies west of the synclinal axis separating the Buck Mountain and Fairfax Falls anticline. (CZu) NEAR THE Fold axes vary between N5W and N45E and plunge GREEN MOUNTAIN AXIS. shallowly northward. The dominant foliation dips The Underhill formation exposed in the river bed north moderately to the east and strikes N30-45E. Sn+1 is of the road structurally underlies the Hazens Notch steeper and more northerly. NNW trending kink bands formation which outcrops further downstream.

Orogen. This suggests the outcrop lies west of the synclinal axis separating the Buck Mountain and Fairfax Falls anticline. (CZu) NEAR THE Fold axes vary between N5W and N45E and plunge GREEN MOUNTAIN AXIS. shallowly northward. The dominant foliation dips The Underhill formation exposed in the river bed north moderately to the east and strikes N30-45E. Sn+1 is of the road structurally underlies the Hazens Notch steeper and more northerly. NNW trending kink bands formation which outcrops further downstream.

Proceed upstream. The dominant greenstone horizons are flows interbedded within clastic foliation here appears to be S1. Tight isoclinal folds with and volcanoclastic rocks. The calcareous greenstone axial surfaces parallel to the dominant foliation (about member is locally discontinuous and difficult to separate N75W, 29N) suggest that the compositional layering in from rocks of entirely clastic origin. The recognized the Hazens Notch of this stop results from intense stratigraphy and the interbedding of clastic units, transposition of bedding into the plane of the schistosity.

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