The evolution of impact basins: Viscous relaxation of topographic relief

1982 ◽  
Vol 87 (B5) ◽  
pp. 3975 ◽  
Author(s):  
Sean C. Solomon ◽  
Robert P. Comer ◽  
James W. Head
Keyword(s):  
Impact Basins ◽  
Viscous Relaxation ◽  
Topographic Relief

On Venus impact basins: Viscous relaxation of topographic relief

1982 ◽  
Vol 87 (B9) ◽  
pp. 7763 ◽  
Author(s):  
Sean C. Solomon ◽  
Stuart K. Stephens ◽  
James W. Head
Keyword(s):  
Impact Basins ◽  
Viscous Relaxation ◽  
Topographic Relief

Stochastic Late Accretion to Earth, the Moon, and Mars

Science ◽  
2010 ◽  
Vol 330 (6010) ◽  
pp. 1527-1530 ◽  
Author(s):  
William F. Bottke ◽  
Richard J. Walker ◽  
James M. D. Day ◽  
David Nesvorny ◽  
Linda Elkins-Tanton
Keyword(s):  
Size Distribution ◽  
Asteroid Belt ◽  
The Moon ◽  
Core Formation ◽  
Highly Siderophile Elements ◽  
Earth’S Mantle ◽  
Distribution Matching ◽  
Siderophile Elements ◽  
Impact Basins

Core formation should have stripped the terrestrial, lunar, and martian mantles of highly siderophile elements (HSEs). Instead, each world has disparate, yet elevated HSE abundances. Late accretion may offer a solution, provided that ≥0.5% Earth masses of broadly chondritic planetesimals reach Earth’s mantle and that ~10 and ~1200 times less mass goes to Mars and the Moon, respectively. We show that leftover planetesimal populations dominated by massive projectiles can explain these additions, with our inferred size distribution matching those derived from the inner asteroid belt, ancient martian impact basins, and planetary accretion models. The largest late terrestrial impactors, at 2500 to 3000 kilometers in diameter, potentially modified Earth’s obliquity by ~10°, whereas those for the Moon, at ~250 to 300 kilometers, may have delivered water to its mantle.

Importance of post-seismic viscous relaxation in southern Iceland

2008 ◽  
Vol 1 (2) ◽  
pp. 136-139 ◽  
Author(s):  
Sigurjón Jónsson
Keyword(s):  
Viscous Relaxation

High frequency viscous relaxation from the Brillouin spectra of n‐pentanol

1990 ◽  
Vol 93 (11) ◽  
pp. 7751-7755 ◽  
Author(s):  
E. Di Fabrizio ◽  
V. Mazzacurati ◽  
M. Nardone ◽  
A. Nucara ◽  
G. Ruocco ◽  
...  
Keyword(s):  
High Frequency ◽  
Viscous Relaxation

Measurements of submicron particles vertical profiles by means of topographic relief in a typical valley city, China

2019 ◽  
Vol 199 ◽  
pp. 102-113 ◽  
Author(s):  
Suping Zhao ◽  
Ye Yu ◽  
Dahe Qin ◽  
Daiying Yin ◽  
Zhiheng Du ◽  
...  
Keyword(s):  
Submicron Particles ◽  
Vertical Profiles ◽  
Topographic Relief ◽  
Valley City

Possible mantle origin of olivine around lunar impact basins detected by SELENE

2010 ◽  
Vol 3 (8) ◽  
pp. 533-536 ◽  
Author(s):  
Satoru Yamamoto ◽  
Ryosuke Nakamura ◽  
Tsuneo Matsunaga ◽  
Yoshiko Ogawa ◽  
Yoshiaki Ishihara ◽  
...  
Keyword(s):  
Mantle Origin ◽  
Lunar Impact ◽  
Impact Basins

scholarly journals IDENTIFYING FAULT ACTIVITY IN THE CENTRAL EVOIKOS GULF (GREECE)

2018 ◽  
Vol 40 (1) ◽  
pp. 439 ◽  
Author(s):  
Th. Rondoyanni ◽  
D. Galanakis ◽  
Ch. Georgiou ◽  
I. Baskoutas
Keyword(s):  
Late Quaternary ◽  
Active Faults ◽  
Point Of View ◽  
Geological Mapping ◽  
Normal Faults ◽  
Geophysical Research ◽  
Alluvial Deposits ◽  
Moderate Seismicity ◽  
Limestone Bedrock ◽  
Topographic Relief

Geological mapping on a 1:5.000 scale and a tectonic analysis in the wider Chalkida region of the Island of Evia and the adjacent Drossia area of Central Greece, have allowed the identification of a number of active and potentially active normal faults. These faults have been formed or reactivated during the Late Quaternary, since they affect Pleistocene brackish and terrestrial deposits. Some of the faults affect the contact of the limestone bedrock with the Quaternary formations, presenting characteristic polished surfaces. The faults, in places covered by the alluvial deposits of the Chalkida plain, are also detected by geophysical research. Among the identified faults, the most important are considered the Aghios Minas- Chalkida, the Avlida and the Lefkadi active faults. The first one extends from Drossia to the Chalkida area, crossing the sea straights, and has an ENE-WSW direction and a south dip. The other two, are parallel antithetic faults oriented WNW-ESE, and bound the South Evoikos Gulf on the Greek mainland and the Evia Island respectively. The mapping and evaluation of active faults in this region of moderate seismicity, with low topographic relief and consequent absence of morphotectonic features, is especially important from a seismic hazard point of view.

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