Results 221 to 230 of about 42,179 (263)

Fault reactivation control on normal fault growth: an experimental study

Journal of Structural Geology, 2005
Field studies frequently emphasize how fault reactivation is involved in the deformation of the upper crust. However, this phenomenon is generally neglected (except in inversion models) in analogue and numerical models performed to study fault network growth.
Bellahsen, Nicolas, Daniel, J.M.
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The Mahelma Fault: An Inverted Normal Fault Of Mitidja Basin?

Proceedings, 2017
Summary This presentation reviews the new data; from both geophysical and geological investigations, carried out through the Sidi-Abdellah microzoning project. As a whole, data indicate that the Mahelma Fault would be an earlier normal fault of the Mitidja basin.
H. Moulouel, A. Bouchelouh, R. Bensalem, E. Oubaiche, Y. Tebbouche, D. Ait-Benamar, D. Machane   +6 more
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Fault displacement gradients on normal faults and associated deformation

AAPG Bulletin, 2014
ABSTRACT Faults are important components of hydrocarbon and other reservoirs; they can affect trapping of fluids, flow pathways, compartmentalization, production rates, and through these, production strategies and economic outcomes. Displacement gradients on faults are associated with off-fault deformation, which can be manifest as ...
Alan P. Morris, Ronald N. McGinnis, DavidA. Ferrill   +2 more
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Anticlustering of small normal faults around larger faults

Geology, 1997
The Solite quarry in the Mesozoic Danville rift basin contains normal faults that conform to two spatial and size distributions. Larger master normal faults (20 cm < length [ L] < 200 cm) are not numerous and have spanned the mechanical layer. The other faults are numerous, small (~0.1 cm < L < 20 cm), and exhibit anticlustering with respect to the ...
Rolf V. Ackermann, Roy W. Schlische
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On the rotation and frictional lock-up of normal faults: Explaining the dip distribution of normal fault earthquakes and resolving the low-angle normal fault paradox

Tectonophysics, 2020
Abstract Classical rock mechanics predicts that normal faults should form at 60–65°, rotating to 30–40° before locking, so widespread slip at around 20° is considered paradoxical. Furthermore, the dip distribution of normal fault earthquakes has a distinct, unexplained peak at ~45°.
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Overlapping Faults, Intrabasin Highs, and the Growth of Normal Faults

The Journal of Geology, 1994
Normal fault systems bounding extensional basins are typically adjoined by a series of subbasins separated by intrabasin highs. The strata within these basins form syndepositional anticlines and synclines whose axes are transverse to the strike of the main bounding fault.
Mark H. Anders, Roy W. Schlische
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Crossing Conjugate Normal Faults

AAPG Bulletin, 2000
Abstract Normal faults commonly develop in two oppositely dipping sets having dihedral angles of around 60°, collectively referred to as conjugate normalfaults. Conjugate normal faults form at a range of scales from cm to km. Where conjugate normal faults cross each other, the faults are commonly interpreted to accommodate extension ...
David A. Ferrill, Alan P. Morris, John A. Stamatakos, Darrell W. Sims   +3 more
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Displacement rates of normal faults

Nature, 1997
Previous estimates of displacement rates on individual faults have been limited to neotectonic faults and averaged over time intervals of about 200 kyr or less1,2,3,4,5. These estimates have been highly variable, which has led to a belief that longer-term displacement rates on individual faults are likely to be variable as well.
A. Nicol‡, J. J. Walsh, J. Watterson, J. R. Underhill   +3 more
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Myths about normal faulting

Geological Society, London, Special Publications, 2016
Abstract Analyses of normal faults in mechanically layered strata reveal that material properties of rock layers strongly influence fault nucleation points, fault extent (trace length), failure mode (shear v. hybrid), fault geometry (e.g.
D. A. Ferrill, A. P. Morris, R. N. McGinnis, K. J. Smart   +3 more
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Mechanical stratigraphy and normal faulting

Journal of Structural Geology, 2017
Abstract Mechanical stratigraphy encompasses the mechanical properties, thicknesses, and interface properties of rock units. Although mechanical stratigraphy often relates directly to lithostratigraphy, lithologic description alone does not adequately describe mechanical behavior. Analyses of normal faults with displacements of millimeters to 10's of
David A. Ferrill, Alan P. Morris, Ronald N. McGinnis, Kevin J. Smart, Sarah S. Wigginton, Nicola J. Hill   +5 more
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