Results 311 to 320 of about 54,725 (346)

Crustal thickness and the forms of impact craters

Journal of Geophysical Research, 1971
Most impact craters with flat lavalike floors are attributed to (1) hypervelocity impact piercing a floating crust and admitting liquid magma to the crater floor or (2) impacts that pierce a solid crust with sufficient energy to relieve the load on high-temperature material held in a solid state, so that it melts and partially fills the crater.
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Crustal-thickness variations in the central Andes

Geology, 1996
We estimated the crustal thickness along an east-west transect across the Andes at lat 20°S and along a north-south transect along the eastern edge of the Altiplano from data recorded on two arrays of portable broadband seismic stations (BANJO and SEDA).
Susan L. Beck, George Zandt, Stephen C. Myers, Terry C. Wallace, Paul G. Silver, Lawrence Drake   +5 more
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Crustal thickness variation in south-central Alaska

Geology, 2006
Crustal thicknesses have been determined by receiver function analysis of broadband teleseismic waveforms recorded during the Broadband Experiment Across the Alaska Range (BEAAR). Typical crust beneath the northern lowlands is 26 km thick, while beneath the mountains it is 35–45 km thick.
Elizabeth Veenstra, Douglas H. Christensen, Geoffrey A. Abers, Aaron Ferris   +3 more
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Crustal thickness of Egypt determined by gravity data

Journal of African Earth Sciences, 1997
The observed Bouguer gravity anomalies of Egypt and surrounding areas have been analysed in terms of the gravity field components due to the lower crust-upper mantle interface (Moho). Band-pass filtering of the observed field in the wavelength band 300 < Λ < 700 km has been assumed to be related to the variable crustal thickness of the area.
DORRE A. S, CARRARA E, CELLA, Federico, GRIMALDI M, Y. A. HADY, HASSAN H, RAPOLLA A, ROBERTI N.   +7 more
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Bouguer anomalies and lithosphere-crustal thickness in Uganda

Journal of Geodynamics, 1985
Recently, a model of the Standard African lithosphere was constructed using regional Bouguer anomalies (Brown and Girdler, 1980). Values of lithospheric and crustal thickness in this model are 100 km and 36.2 km, respectively. The corresponding value of Bouguer anomaly is —48 mgal. Bouguer anomalies of Uganda were averaged over 1° grids.
Samir Riad, Hassan A. El Etr
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Crustal thickness estimates for the western Himalaya

1989
The main collision between the Indian and Asian lithospheric plates occurred during late Eocene time (40 to 50 m.y. ago). Continued northward migration of the Indian plate since that time at the rate of 5 cm/yr has resulted in approximately 2,000 km of closure between the two plates.
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Crustal thickness patterns in the Australian continent

2003
The crust-mantle boundary is defined seismologically by the Mohorovicic discontinuity (or Moho), where the velocity of seismic waves increases from typical crustal values to typical mantle values. The depth of the Moho beneath Australia has been mapped using all available seismic data in order to study the crustal thickness patterns and their ...
C. D. N. COLLINS, B. J. DRUMMOND, M. G. NICOLL   +2 more
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Finite element modeling of lower crustal flow: A model for crustal thickness variations

Journal of Geophysical Research: Solid Earth, 1991
Small‐scale convection beneath continental lithosphere is likely to initiate viscous flow in the ductile lower crust. Positive lithospheric bending will develop above upwelling mantle flow leading to a lateral squeezing out of crustal material from elevated areas which results in significant crustal thickness variations in its final stage. This process
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Using Crustal Thickness Modeling to study Mars' Crustal and Mantle Structures

2014
Master of ...
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Stresses in the lithosphere caused by crustal thickness inhomogeneities

Journal of Geophysical Research, 1973
A physical analysis is given of the state of stresses in the earth's lithosphere floating on the asthenosphere. Crustal thickness strongly varies in a horizontal direction and thus creates large variations in the potential energy stored in the crust. As a result, the crustal material tends to spread and to reduce crustal thickness inhomogeneities.
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