Impact frustration of the origin of life

  title={Impact frustration of the origin of life},
  author={Kevin Albert Maher and David J. Stevenson},
One possible definition for the origin of life on Earth is the time at which the interval between devastating environmental insults by impact exceeded the timescale for establishing self-replicating proto-organisms. A quantitative relationship for the Hadean (pre-3,800 Myr ago) and Early Archean (3,800 to 3,400 Myr) impact flux can be derived from the lunar and terrestrial impact records. Also, the effects of impact-related processes on the various environments proposed for abiogenesis (the… 
Impact constraints on the environment for chemical evolution and the continuity of life
The frequency of giant terrestrial impacts able to stop prebiotic chemistry in the probable regions of chemical evolution is explored to suggest life probably could have originated near the surface between frequent surface sterilizing impacts.
The Role of Meteorite Impacts in the Origin of Life
It is proposed that meteorite impact events are a fundamental geobiological process in planetary evolution that played an important role in the origin of life on Earth and should be considered prime sites in the search for evidence of past life on Mars.
The Geology and Habitability of Terrestrial Planets: Fundamental Requirements for Life
Abstract The current approach to the study of the origin of life and to the search for life elsewhere is based on two assumptions. First, life is a purely physical phenomenon closely linked to
Estimates of the maximum time required to originate life
The impact model suggests that it is possible that life may have originated more than once and the maximum time required for the origination of life is the time that occurred between sterilizing impacts just before 3.8 Ga.
The early environment and its evolution on Mars: Implication for life
There is considerable evidence that the early climate of Mars was very different from the inhospitable conditions there today. This early climate was characterized by liquid water on the surface and
Origins of life: A comparison of theories and application to Mars
It is found that the entire range of current theories suggests that liquid water is the quintessential environmental criterion for both the origin and sustenance of life.
The seeding of life by comets.
Seeding life on the moons of the outer planets via lithopanspermia.
It is expected that material from Earth and Mars to the moons of Jupiter and Saturn is most likely to occur during the Late Heavy Bombardment or during the ensuing 1-2 billion years, and there are significant rates of re-impact in the first million years after ejection.


Terrestrial Impact Structures
Impact structures are the dominant landform on planets that have retained portions of their earliest crust. The present surface of the Earth, however, has comparatively few recognized impact
Extraterrestrial Cause for the Cretaceous-Tertiary Extinction
A hypothesis is suggested which accounts for the extinctions and the iridium observations, and the chemical composition of the boundary clay, which is thought to come from the stratospheric dust, is markedly different from that of clay mixed with the Cretaceous and Tertiary limestones, which are chemically similar to each other.
Ion microprobe identification of 4,100–4,200 Myr-old terrestrial zircons
We report here the existence of detrital zircons from Western Australia which are far older than any known terrestrial rocks. They are from quartzites at Mt Narryer (Fig. 1), a locality which has
Archaean plate tectonics revisited 1. Heat flow, spreading rate, and the age of subducting oceanic lithosphere and their effects on the origin and evolution of continents
A simple model which relates the rate of seafloor creation and the age of the oceanic lithosphere at subduction to the rate of continental accretion can successfully explain the apparent differences
Two classes of solid bodies large enough to be detected by telescopes occur in orbits that overlap that of the Earth. These bodies are the Earth-crossing asteroids and comet nuclei. Although their
Toward a theory of impact crises
In a certain sense, the impact explanation for the mass extinction at the end of the Cretaceous had its origin in Lamont Hall. A couple of years after I came to Lamont in 1971, I started working with