NEIGC
field trip A-5, October 8,
2004, investigated the geology of the Ossipee ring complex, central New Hampshire. The
Ossipee complex is a member of the Younger White Mountain Igneous
Province and has an age of ca 121 Ma. The geologic map is shown
to the right. The field trip visited outcrops of the various ring-dike
facies, basalt outcrops showing evidence of magma mixing and mingling,
rhyolite outcrops rich in enclaves and also showing features of magma
mingling and mixing, and the coarse-grained "Conway" granite
that forms the central portion of the complex. A stop was also made
peripheral to the complex to investigate the country rocks. The images
below show some of the field trip stops and the field trip
participants. The field trip guide (Ossipee
NEIGC) is available as a pdf file. |
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