Frontenac Formation

Thick-bedded, ankeritic, micaceous, and feldspathic metasandstones interlayered with subordinate dark-gray metapelite. Metasandstone beds commonly are rusty weathering and up to 4 m thick; calc-silicate lenses locally present. Part of the Connecticut Valley Trough.
State Vermont
Name Frontenac Formation
Geologic age Devonian and Silurian
Lithologic constituents
Major
Metamorphic > Metasedimentary > Metaclastic > MetasandstoneThick-bedded, ankeritic, micaceous, and feldspathic metasandstones. Metasandstone beds commonly are rusty weathering and up to 4 m thick.
Minor
Metamorphic > Metasedimentary > MetaclasticInterlayered with subordinate dark-gray metapelite.
Incidental
Metamorphic > Metasedimentary > Calc-silicate-rockCalc-silicate lenses locally present.
References
NGMDB product
Counties Essex