Geology of the Linville Falls Quadrangle North Carolina
GEOLOGICAL SURVEY BULLETIN 1161-B
Geology of the Linville Falls Quadrangle North Carolina
By JOHN C. REED, JR.
CONTRIBUTIONS TO GENERAL GEOLOGY
GEOLOGICAL SURVEY BULLETIN 1161-B
A study of an area of complex structural and metamorphic history in western North Carolina
UNITED STATES GOVERNMENT PRINTING OFFICE, WASHINGTON : 1964 UNITED STATES DEPARTMENT OF THE INTERIOR
STEWART L. UDALL, Secretary
GEOLOGICAL SURVEY
Thomas B. Nolan, Director
For sale by the Superintendent of Documents, U.S. Government Printing Office Washington, D.C. 20402 CONTENTS
Page Abstract....______Bl Introduction...... ______2 Geologic investigations...... ______... 3 Rock units_---_---____.______4 Rocks of the Grandfather Mountain window.______4 Autochthonous rocks______-__-_-___-____--______-__ 4 Precambrian granitic rocks____-_-__-_____--__---_---_-_ 6 Wilson Creek Gneiss______6 Blowing Rock Gneiss______-__-_- 8 Brown Mountain Granite______8 Upper Precambrian rocks______9 Grandfather Mountain Formation ______9 Linville Metadiabase______13 Rocks of the Tablerock thrust sheet______--___--______14 Chilhowee Group______14 Lower quartzite unit______-______15 Phyllite unit______15 Upper quartzite unit______-»______16 Quartzite in tectonic slices______-__-_--___---_- 17 Shady Dolomite______17 Rocks of the Blue Ridge thrust sheet_____--_-_____----___---_-.- 18 Mica schist, mica gneiss, and amphibolite______19 Cranberry Gneiss______20 Granodiorite and pegmatite______21 Gneiss southeast of the Grandfather Mountain window______22 Rocks of the Brevard fault zone______23 Phyllonitic schist and gneiss______24 Blastomylonite and related rocks______--______-______25 Rocks of the Inner Piedmont______25 Gneiss and schist______26 Ultramafic rocks______28 Henderson Gneiss______-_-______-____-__._ 28 Quartz monzonite.______30 Pegmatite. ______31 Surficial deposits.______31 Residual and coiluvial deposits______31 Alluvial deposits______32 Alluvial fan deposits______32 High-level gravels.______33 Flood-plain deposits______34 in IV CONTENTS