Paleozoic tectonic evolution of the western Blue Ridge, southern Appalachians: A critical examination of long-standing conflicts in a polydeformed system

2018 ◽  
Author(s):  
J. Ryan Thigpen ◽  
Robert D. Hatcher
Keyword(s):  
Tectonic Evolution ◽  
Critical Examination ◽  
Southern Appalachians ◽  
Blue Ridge

Reevaluating the age of the Walden Creek Group and the kinematic evolution of the western Blue Ridge, southern Appalachians

2016 ◽  
Vol 316 (3) ◽  
pp. 279-308 ◽  
Author(s):  
J. R. Thigpen ◽  
R. D. Hatcher ◽  
L. C. Kah ◽  
J. E. Repetski
Keyword(s):  
Southern Appalachians ◽  
Blue Ridge ◽  
Kinematic Evolution

Plutonism in three orogenic pulses, Eastern Blue Ridge Province, southern Appalachians

2006 ◽  
Vol 118 (1-2) ◽  
pp. 171-184 ◽  
Author(s):  
B. V. Miller ◽  
A. H. Fetter ◽  
K. G. Stewart
Keyword(s):  
Southern Appalachians ◽  
Blue Ridge ◽  
Blue Ridge Province

New paleontological evidence for complex middle Paleozoic tectonic evolution in the Appalachian western Blue Ridge

2020 ◽  
Vol 132 (9-10) ◽  
pp. 2105-2118
Author(s):  
Mary E. Lupo ◽  
James F. Tull ◽  
John Repetski ◽  
Paul A. Mueller
Keyword(s):  
North Carolina ◽  
Tectonic Evolution ◽  
Blue Ridge ◽  
Relative Paucity ◽  
Southern Appalachian ◽  
Stratigraphic Framework ◽  
Taconic Orogeny ◽  
Middle Paleozoic ◽  
Thrust Sheets ◽  
Group B

Abstract Reconstructing the tectonic evolution of the southern Appalachian metamorphic internides is hampered by the relative paucity of accurate geochronologic constraints and the apparent rarity or absence of Paleozoic cover sequences. At the orogen’s greatest width, near the junction of Georgia, North Carolina, and Tennessee, the western Blue Ridge is a composite metamorphic allochthon of three major thrust sheets: (A) a basal sheet above the Great Smoky fault overlying rocks of the foreland thrust belt composed of the Lower Cambrian Chilhowee Group and underlying Sandsuck Formation of the Neoproterozoic Walden Creek Group; (B) an intermediate sheet above the Maggies Mill–Citico fault composed of the middle Paleozoic Maggies Mill Formation; and (C) the main mass of the western Blue Ridge above the Alaculsy Valley–Miller Cove fault composed of the Neoproterozoic Ocoee Supergroup, and younger overlying sequences in the Epperson and Murphy synclinoria. The age of peak deformation and metamorphism in all of these sequences has historically been assigned to the Ordovician Taconic orogeny, but recent paleontologic discoveries suggest these events are significantly younger. In addition to the middle Paleozoic fauna recently reported from the Maggies Mill Formation in the intermediate thrust sheet, Silurian-Devonian conodonts have been found in units formerly correlated with the Walden Creek Group in the Epperson synclinorium. These discoveries suggest that widespread middle Paleozoic successor basin sequences unconformably overlie the Neoproterozoic-Cambrian drift-facies of the Chilhowee Group (and equivalents) and underlying rift-facies of the Ocoee Supergroup, and require modifications to existing models for the timing of the region’s stratigraphic framework and tectono-metamorphic evolution.

AN EARLY AND HOT ALLEGHANIAN OROGENY IN THE EASTERN BLUE RIDGE OF THE SOUTHERN APPALACHIANS

2020 ◽  
Author(s):  
Jamie S.F. Levine ◽  
◽  
Gabriele Casale ◽  
Ryan J. McAleer ◽  
Arthur Merschat ◽  
...  
Keyword(s):  
Southern Appalachians ◽  
Blue Ridge
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