Coordinated strike-slip and normal faulting in the southern Ozark Dome of northern Arkansas; deformation in a late Paleozoic foreland

Structures that formed on the southern flank of the Ozark dome, in the foreland of the late Paleozoic Ouachita orogeny, have received little modern study. New mapping of the western Buffalo River region of northern Arkansas identifies diversely oriented faults and monoclinal folds that displace the...

Full description

Saved in:
Bibliographic Details
Published in:Geology (Boulder) 2000-06, Vol.28 (6), p.511-514
Main Author: Hudson, Mark R
Format: Article
Language:English
Subjects:
Arkansas
Boone County Arkansas
Buffalo River
Cartography
deformation
domes
extension
faults
flexure
folds
forelands
Geology
lateral faults
monoclines
Newton County Arkansas
normal faults
northern Arkansas
orogeny
Ouachita Orogeny
Ozark Mountains
Paleozoic
Plate tectonics
right-lateral faults
strain
strike-slip faults
Structural geology
tectonics
United States
upper Paleozoic
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Structures that formed on the southern flank of the Ozark dome, in the foreland of the late Paleozoic Ouachita orogeny, have received little modern study. New mapping of the western Buffalo River region of northern Arkansas identifies diversely oriented faults and monoclinal folds that displace the generally flat lying Mississippian Boone Formation over a 180 m elevation range. Kinematic measurements and spatial relations reveal the presence of both east-striking normal faults and broader northeast-striking dextral strike-slip fault zones that acted in a coordinated fashion to accommodate constrictional strain, in which north-south extension was balanced by vertical and east-directed shortening. North-south extension in the Buffalo River region probably reflects Pennsylvanian-Early Permian deformation within the flexural forebulge of the developing Ouachita orogeny, which closed progressively westward along the southern margin of the craton.
ISSN:0091-7613
1943-2682
DOI:10.1130/0091-7613(2000)28<511:CSANFI>2.0.CO;2