Metaconglomerate and Metaquartzite

Light-gray to gray, conglomeratic and feldspathic schist, biotite schist, taconite, and phyllite. Individual conglomerate and fanglomerate tongues from 100-500 ft (30-152 m) thick. Total thickness over 10,000 ft (3,048 m).
State South Dakota
Name Metaconglomerate and Metaquartzite
Geologic age Early Proterozoic
Lithologic constituents
Metamorphic > Schistconglomeratic and feldspathic schist, biotite schist
Metamorphic > Metasedimentary > Metaclastic > Phyllite
Sedimentary > Chemical > Banded-iron-formation (Bed)Taconite=iron-formation

Martin, J.E., Sawyer, J.F., Fahrenbach, M.D., Tomhave, D.W., and Schulz, L.D., 2004, Geologic Map of South Dakota: South Dakota Geological Survey, GM 10, scale 1:500,000.

NGMDB product
Counties Lawrence - Meade - Pennington