Results 161 to 170 of about 13,545 (201)

Lunar cratering chronology

Icarus, 1970
Abstract Solidification ages from Apollo rock samples plus the present-day impact rate are used to derive the time-behaviour of lunar cratering. Indications of three different families of impacting bodies are discussed.
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Influence of the asymmetrical cratering rate on the lunar cratering chronology

Icarus, 2005
The lunar cratering rate studied over the past 1.1 Gyr, which is a foundation of the lunar cratering chronology, is a decreasing function of the angular distance from the apex of the orbital motion due to the synchronous rotation of the Moon. We here evaluate an influence of the asymmetrical rate upon the age determination.
T MOROTA, T UKAI, M FURUMOTO
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Cratering History and Lunar Chronology

Reviews in Mineralogy and Geochemistry, 2006
The Moon is exceptional and important because it is the only planetary body besides the Earth for which we have both a detailed stratigraphic history and datable rock samples that can be related to specific geomorphologic units (Fig. 5.1⇓). The Moon has preserved much of its magmatic and impact record of at least the last 4 billion years.
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Chronological sequence of Chang'E-4 landing zone within Von Kármán crater

Icarus, 2021
Abstract Sequence and timing are critical for understanding the geologic evolution. Here we performed detailed crater size-frequency distribution measurements within the Von Karman crater, where China's Chang'E-4 (CE-4) mission landed, and its surroundings including Alder and Finsen craters, to understand the geologic evolution of the landing zone ...
Yu Lu, Yunzhao Wu, Gregory G. Michael, Jinsong Ma, Wei Cai, Nannan Qin   +5 more
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In situ calibration of the Martian cratering chronology

Meteoritics & Planetary Science, 2019
AbstractCrater densities on planetary surfaces allow assessing relative ages but so far firm calibration of so‐called cratering‐chronology models is available only for the Moon and limited to the past 4.1 billion years. Most planetary geological time scales are still model‐dependent, and essentially constrained by meteorite ages or by comparison to ...
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MARS CHRONOLOGY DERIVED FROM CRATERS HETEROGENEITY AT GALE CRATER

Romanian Astronomical Journal
Craters sample into diachronic surfaces and different depths on Mars and other planetary surfaces. These surfaces are affected by cosmonuclide radiation that offers one of the most reliable age anchors to date. Craters also accumulate, evolve and display an universal characteristic that can be measured at any scale, regardless of the geologic unit they
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The Lunar Cratering Chronology

Reviews in Mineralogy and Geochemistry, 2023
H. Hiesinger, C.H. van der Bogert, G. Michael, N. Schmedemann, W. Iqbal, S.J. Robbins, B. Ivanov, J.-P. Williams, M. Zanetti, J. Plescia, L. R. Ostrach, J.W. Head   +11 more
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Localization of Martian ridges by impact craters: Mechanical and chronological implications

Journal of Geophysical Research: Planets, 1995
The eastern flank of the Tharsis dome (Mars) is affected by compressional ridges. Two conceptual models exist for these structures: (1) the ridges are the expression of a superficial shortening and are rooted on a rheological boundary located in the megaregolith or (2) the ridges result from a global shortening on a lithospheric scale and are rooted on
P. Allemand, P. G. Thomas
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Martian cratering 8: Isochron refinement and the chronology of Mars

Icarus, 2005
Abstract This paper reviews and refines the technique of dating martian surfaces by using impact-crater isochrons (defined as size distributions of impact craters on undisturbed martian surfaces of specified ages). In the 1970s, this system identified not only abundant ancient martian volcanic surfaces, but also extensive lava plains with ages of a ...
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The role of secondary craters on Martian crater chronology

2021
Tyler M. Powell, Lior Rubanenko, Jean-Pierre Williams, David A. Paige   +3 more
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