Microcline-magnetite augen gneiss at Brandon Gap

Pinkish-gray to medium-dark-gray, biotite-magnetite-microcline-plagioclase augen gneiss. U-Pb zircon SHRIMP age of 1,149±8 Ma, no. 13 (Aleinikoff and others, 2011). Unit is associated with minor exposures of metadiorite to tonalitic gneisses; crosscuts a gneissosity in country rocks and may extend northward along eastern limb of Lincoln Mountain massif as unit Y3Ama. Chittenden Intrusive Suite (1,149±8 Ma to 1,119±3 Ma). Mount Holly Complex intrusive rocks. Rocks of the Green Mountain and Lincoln Mountain massifs and eastern domes.
State Vermont
Name Microcline-magnetite augen gneiss at Brandon Gap
Geologic age Late Mesoproterozoic
Lithologic constituents
Major
Metamorphic > Metasedimentary > ParagneissPinkish-gray to medium-dark-gray, biotite-magnetite-microcline-plagioclase augen gneiss. Unit is associated with minor exposures of metadiorite to tonalitic gneisses
Minor
Metamorphic > Metaigneous > Metaintrusive > MetadioriteUnit is associated with minor exposures of metadiorite to tonalitic gneisses.
References
NGMDB product
Counties Addison