|Name||Northfield Formation - quartzite, grit, and conglomerate member|
|Geologic age||Lower Devonian and Upper Silurian|
Sedimentary > Clastic > ConglomerateGray quartzite and conglomerate.
Metamorphic > Metasedimentary > Metaclastic > Metasandstone > MetagraywackeDark-gray quartz-pebble metawacke.
Metamorphic > Metasedimentary > Metaclastic > QuartziteGray quartzite and conglomerate.
|Comments||On the printed map the unit label is DSnq, but in the GIS it is Snq. Changing to DSnq to match the printed map; Snq is a mistake according to Greg Walsh (oral communication 2012).|
|Counties||Windham - Windsor|