Lahore Complex - Amphibole monzonite

Mesocratic, medium-grained, amphibole monzonite and amphibole-quartz monzonite have a foliation defined by alignment of tabular feldspar crystals. Mineralogy includes microcline or orthoclase, intermediate-composition plagioclase, and quartz; mafic minerals are amphibole ranging from common hornblende to edenite, locally rimming pyroxene, subordinate biotite, and magnetite. Epidote, titanite, apatite and allanite are also present.
State Virginia
Name Lahore Complex - Amphibole monzonite
Geologic age Ordovician
Lithologic constituents
Igneous > Plutonic > Syenitic > Monzonite
Comments Western Piedmont (Northern)

Virginia Division of Mineral Resources, 1993, Geologic Map of Virginia: Virginia Division of Mineral Resources, scale 1:500,000.

Virginia Division of Mineral Resources, 2003, Digital Representation of the 1993 Geologic Map of Virginia, Publication 174, CD ROM (ISO-9660) contains image file, expanded explanation in pdf, and ESRI shapefiles, scale 1:500,000.

NGMDB product
Counties Orange