Impact Cratering: A Geologic Process
- H. Melosh
The mechanisms involved in the formation of impact craters are examined theoretically, reviewing the results of recent investigations. Topics addressed include crater morphology, stress waves in…
Resistance of Bacillus Endospores to Extreme Terrestrial and Extraterrestrial Environments
- W. Nicholson, N. Munakata, G. Horneck, H. Melosh, P. Setlow
- Biology, MedicineMicrobiology and Molecular Biology Reviews
- 1 September 2000
The molecular laboratory model of spore resistance mechanisms is summarized and attempts to use the model as a basis for exploration of the resistance of spores to environmental extremes both on Earth and during postulated interplanetary transfer through space as a result of natural impact processes.
A Reevaluation of Impact Melt Production
The production of melt and vapor is an important process in impact cratering events. Because significant melting and vaporization do not occur in impacts at velocities currently achievable in the…
Earth Impact Effects Program: A Web‐based computer program for calculating the regional environmental consequences of a meteoroid impact on Earth
Abstract— We have developed a Web‐based program for quickly estimating the regional environmental consequences of a comet or asteroid impact on Earth (http:www.lpl.arizona.eduimpacteffects). This…
The Crust of the Moon as Seen by GRAIL
The Moon's gravity field shows that the lunar crust is less dense and more porous than was thought, and high-resolution gravity data obtained from the dual Gravity Recovery and Interior Laboratory (GRAIL) spacecraft show that the bulk density of the Moon's highlands crust is substantially lower than generally assumed.
Impact ejection, spallation, and the origin of meteorites
- H. Melosh
- Geology, Physics
- 1 August 1984
IMPACT CRATER COLLAPSE
The detailed morphology of impact craters is now believed to be mainly caused by the collapse of a geometrically simple, bowl-shaped “transient crater.” The transient crater forms immediately after…
The origin of the moon and the single-impact hypothesis III.
Mechanisms of metal-silicate equilibration in the terrestrial magma ocean