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Thomas S. Helms
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Journal Article

Petrogenesis of Early Proterozoic pelitic schists of the southern Black Hills, South Dakota: Constraints on regional low-pressure metamorphism Available to Purchase

THOMAS S. HELMS, THEODORE C. LABOTKA
Journal: GSA Bulletin
Published: 01 October 1991
GSA Bulletin (1991) 103 (10): 1324–1334.
DOI: https://doi.org/10.1130/0016-7606(1991)103<1324:POEPPS>2.3.CO;2
View PDF for article title, Petrogenesis of Early Proterozoic pelitic schists of the southern Black Hills, South Dakota: Constraints on regional low-pressure metamorphism
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Journal Article

Petrology of a Georgia Blue Ridge amphibolite unit with hornblende + gedrite + kyanite + staurolite Available to Purchase

Thomas S. Helms, Harry Y. McSween, Theodore C. Labotka, Eugene Jarosewich
Published: 01 December 1987
American Mineralogist (1987) 72 (11-12): 1086–1096.
View PDF for article title, Petrology of a Georgia Blue Ridge amphibolite unit with hornblende + gedrite + kyanite + staurolite
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