Browse Items (20 total)

Sample found intruding into Conway Granite (WMB-7)

Coarse grained

This sample is coarse grained and contains fayalite, ferrohedenbergite, and ferrohastingsite.

The granites at this locality are intruded by aplite dikes (WMB-6)

fine-coarse grained pink granite

Massive red granite. Grain size ranges from coarse to fine.

Green granite; contains hornblende and, locally, hastingsite, ferrohedenbergite, or fayalite

Granite containing hornblende and, locally, hastingsite, ferrohedenbergite, or fayalite

Granite containing hornblende and, locally, hastingsite, ferrohedenbergite, or fayalite.

Volcanic unit that is part of a large block of float material in big brook which drains the middle Moat mountain.

Sample from a ring dike and is fine-grained and quartz poor.

Contains large phenocrysts of perthite. Rocks in the outcrop also contain abundant mafic xenoliths. Sample collected from a ring dike

The bulk of the rock contains quartz, k-spar, and amphibole.

An example of the 3rd ring dike. This outcrop also contains dark xenoliths.

Sample contains phenocrysts of perthite. The bulk of the rock contains quartz, k-spar, and amphibole.

Described as "comendite volcanics", these rocks are part of the "moat volcanic" series within the White Mountain Magma series. Also described as a "quartz porphyry"

Sample found in massive slabby outcrops in the bed of the Sawyer River.

Sample intruded by Osceola granite (WMB-5). Sample contains bronze colored needles of astrophyllite associated with riebeckite.

This rock type is considered to be the most mafic of all units found in the entire White Mountain Batholith.