Results 131 to 140 of about 360 (159)

THE SILER CITY HORST AND GRABEN NETWORK IN THE CAROLINA TERRANE, CHATHAM COUNTY, NORTH CAROLINA

Geological Society of America Abstracts with Programs, 2018
Philip J. Bradley, Brandon T. Peach, Heather D. Hanna   +2 more
exaly   +2 more sources

Spectral Ratio Estimates for Site Effects on the Horst–Graben System in West Turkey

Pure and Applied Geophysics, 2013
Recordings of micro- and moderate-size local earthquakes have been used to quantify site effects in the central-west Turkey which contains one of the world’s best examples of a rapid intra-continental extension with its high population and industrial potential.
Kurtulmuş, Tevfik Özgür, Akyol, Nihal, Camyildiz, Murat, Güngör, Talip   +3 more
openaire   +2 more sources

Implications of horsts and grabens on the development of canyons and seismicity on the west africa coast

Journal of African Earth Sciences, 2018
Abstract Subsurface basement topography in the Nigerian portion of the Benin Basin has been studied using borehole data of wells drilled to the basement and one strike line of seismic section. Two areas of a sharp drop in topography with a horst in between were observed in the study area.
Peter S. Ola, Solomon O. Olabode
openaire   +1 more source

The Nature and Origin of the Horst and Graben Structure of Southern Oregon

The Journal of Geology, 1929
In southern Oregon east of the Cascade Mountains a varied series of Tertiary lavas is cut by the northern continuation of the Basin Range faults, giving rise principally to relatively undissected horst and graben structure rather than to tilted fault-block mountains. The tensional origin of these faults is indicated by definite normal faulting, curving,
Richard E. Fuller, Aaron Clement Waters
openaire   +1 more source

JABIRU FIELD — HORST, SUB- HORST OR INVERTED GRABEN?

The APEA Journal, 1989
With control from only the Jabiru 1A discovery well and a grid of seismic lines 3 km apart, original oil- in- place at Jabiru was estimated by the operator as 620 MMBBL (100 MkL). With a 3- D seismic grid and three more wells, the original oil- in- place estimate was reduced to 45 MMBBL (7 MkL).
openaire   +1 more source

Icelandic Tectonics—Graben or Horst ?

Geological Magazine, 1941
The younger rocks of Iceland (Pliocene to Present Day) occupy the broad median zone shown in Text-fig. I; the boundaries are only approximate in places, and information is lacking with regard to the eastern one particularly. Outside this zone early Tertiary basalts predominate but (I) the uppermost basalts are regarded by some authors as Quaternary, (2)
openaire   +1 more source

A Method of Graben and Horst Formation

The Journal of Geology, 1958
Grabens and horsts between transcurrent faults in New Zealand, currently explained by normal faulting, are shown to be caused by lateral displacement. The mechanics of the formation of such features is explained.
openaire   +1 more source

Tectonostratigraphy and processes of frontal accretion with horst-graben subduction at the Japan Trench

2018
ABSTRACT Recent seismic reflection data across the Japan Trench show that frontal accretion involves offscraping sediments on top of horsts and scooping-up sediment from grabens. However, seismic profiling does not illuminate the structure within the accretionary prism, and thus the processes of accretion and prism growth are unknown ...
Frederick M. Chester, J. Casey Moore
openaire   +1 more source

Horst and graben structures on the flanks of the Mid-Atlantic ridge in the MARK area (23°22′N): Submersible observations

Tectonophysics, 1996
Abstract South of the Kane fracture zone (23°40′N), the Mid-Atlantic ridge is segmented into 20–100-km-long spreading cells in which morphology, seismic and gravity signatures change along and across the ridge-axis. The rift valley, considered as a typical structure along slow-spreading ridges, can be symmetric or asymmetric, and segment centers ...
C. Durant, V. Ballu, P. Gente, J. Dubois
openaire   +1 more source

Basin and Range Structure: A System of Horsts and Grabens Produced by Deep-Seated Extension

Geological Society of America Bulletin, 1971
Basin and Range structure can be interpreted as a system of horsts and grabens produced by the fragmentation of a crustal slab above a plastically extending substratum. According to this view, the extension of the substratum causes the basal part of the slab to be pulled apart along narrow, systematically spaced zones which in turn cause the ...
openaire   +1 more source