Publications
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Crustal structure beneath the Kenya Rift from axial profile data
Modelling of the KRISP 90 axial line data shows that major crustal thinning occurs along the axis of the Kenya Rift from Moho depths of 35 km in the south beneath the Kenya Dome in the vicinity of Lake Naivasha to 20 km in the north beneath Lake Turkana. Low Pn velocities of 7.5–7.7 km/s are found beneath the whole of the axial line. The results indicate that crustal extension increases to the nor
Authors
J. Mechie, Gordon R. Keller, C. Prodehl, S. Gaciri, L.W. Braile, Walter D. Mooney, D. Gajewski, K.-J. Sandmeier
The East African rift system in the light of KRISP 90
On the basis of a test experiment in 1985 (KRISP 85) an integrated seismic-refraction/teleseismic survey (KRISP 90) was undertaken to study the deep structure beneath the Kenya rift down to depths of 100–150 km. This paper summarizes the highlights of KRISP 90 as reported in this volume and discusses their broad implications as well as the structure of the Kenya rift in the general framework of ot
Authors
Gordon R. Keller, C. Prodehl, J. Mechie, K. Fuchs, M.A. Khan, Peter K.H. Maguire, Walter D. Mooney, U. Achauer, P.M. Davis, R.P. Meyer, L.W. Braile, I.O. Nyambok, G. A. Thompson
Seismic structure of the uppermost mantle beneath the Kenya rift
A major goal of the Kenya Rift International Seismic Project (KRISP) 1990 experiment was the determination of deep lithospheric structure. In the refraction/wide-angle reflection part of the KRISP effort, the experiment was designed to obtain arrivals to distances in excess of 400 km. Phases from interfaces within the mantle were recorded from many shotpoints, and by design, the best data were obt
Authors
Gordon R. Keller, J. Mechie, L.W. Braile, Walter D. Mooney, C. Prodehl
The KRISP 90 seismic experiment-a technical review
On the basis of a preliminary experiment in 1985 (KRISP 85), a seismic refraction/wide-angle reflection survey and a teleseismic tomography experiment were jointly undertaken to study the lithospheric structure of the Kenya rift down to depths of greater than 200 km. This report serves as an introduction to a series of subsequent papers and will focus on the technical description of the seismic su
Authors
C. Prodehl, J. Mechie, U. Achauer, Gordon R. Keller, M.A. Khan, Walter D. Mooney, S.J. Gaciri, J.D. Obel
Crustal architecture of the Cascadia Forearc
Seismic profiling data indicate that the thickness of an accreted oceanic terrane of Paleocene and early Eocene age, which forms the basement of much of the forearc beneath western Oregon and Washington, varies by approximately a factor of 4 along the strike of the Cascadia subduction zone. Beneath the Oregon Coast Range, the accreted terrane is 25 to 35 kilometers thick, whereas offshore Vancouve
Authors
A.M. Trehu, I. Asudeh, Thomas M. Brocher, James H. Luetgert, Walter D. Mooney, J.L. Nabelek, Y. Nakamura
Composition of the crust beneath the Kenya rift
We infer the composition of the crust beneath and on the flanks of the Kenya rift based on a comparison of the KRISP-90 crustal velocity structure with laboratory measurements of compressional-wave velocities of rock samples from Kenya. The rock samples studied, which are representative of the major lithologies exposed in Kenya, include volcanic tuffs and flows (primarily basalts and phonolites),
Authors
Walter D. Mooney, N.I. Christensen
Quaternary tectonics of Utah with emphasis on earthquake-hazard characterization
This report consolidates and synthesizes information on Quaternary faulting, folding, and volcanism in Utah and characterizes recent tectonic activity throughout the state. The primary purpose is to provide a comprehensive reference on faultspecific seismic sources and surface rupture to facilitate the evaluation of earthquake hazards in Utah. Two 1:500,000-scale maps show Quaternary tectonic feat
Authors
Suzanne Hecker
Priorities for landslide mapping during the International Decade of Hazard Reduction
No abstract available.
Authors
E. E. Brabb
Lake Baikal - A touchstone for global change and rift studies
No abstract available.
Authors
Deborah R. Hutchinson, Steve M. Colman
Investigating Climate Change of Western North America
No abstract available.
Authors
James V. Geological Survey (U.S.) Gardner