(WMB) White Mountains Batholith -- New Hampshire

Title

(WMB) White Mountains Batholith -- New Hampshire

Collection Items

WMB Suite PDF

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

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.

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

Coarse grained

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

fine-coarse grained pink granite

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

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

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

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"

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

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

Sample found intruding into Conway Granite (WMB-7)

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

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

This rock type is considered to be the most mafic of all units found in the entire White Mountain Batholith.
View all 20 items