Rye Complex

Light-colored to gray schists and gneisses, quartzites, and amphibolites. Variably migmatized and mylonized. Contact with Kittery Formation on west is the Portsmouth Fault.
State New Hampshire
Name Rye Complex
Geologic age Ordovician? - Late Proterozoic?
Lithologic constituents
Major
Metamorphic > Schist
Metamorphic > Gneiss
Metamorphic > Metasedimentary > Metaclastic > Quartzite
Minor
Metamorphic > Amphibolite
Metamorphic > Migmatitevariably migmatized and mylonized
Comments Part of the Nashoba-Casco-Miramichi Terrane (Merrimack Trough). Quartz syenite dike (point within formation) = 159 K/Ar per NH037.
References

Lyons, J.B., Bothner, W.A., Moench, R.H., and Thompson, J.B., Jr., 1997, Bedrock Geologic Map of New Hampshire: Reston, VA, U.S. Geological Survey Special Map, 2 sheets, scale 1:250,000.

https://ngmdb.usgs.gov/Prodesc/proddesc_37338.htm

Aleinikoff, J.N., 1978, Structure, petrology, and U-Th-Pb geochronology in the Milford (15') quadrangle, New Hampshire: Hanover, N.H., Dartmouth College, Ph.D. thesis, 247 p.

NGMDB product
Counties Rockingham