Browse Items (1651 total)

fine grained

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.

Hand Sample: Holocrystalline, phaneritic, medium-grained granite composed predominantly of smaller alkali feldspar crystals with larger crystals of smoky quartz, biotite, and plagioclase feldspar

Hand Sample: Holocrystalline, phaneritic, medium-grained granitoid with an abundance of alkali feldspar. Other minerals include quartz and biotite. Some chemical weathering has produced a white coating.

foliated

Hand Sample: Holocrystalline, medium-grained phaneritic granite with smoky quartz, potassium feldspar, and biotite

medium grained, medium gray w/ pinkish tint

basic

somewhat foliated

somewhat more leucocratic than normal