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- W4211183491 abstract "We review the theoretical and observational evidence that, on timescales relevant to mankind, the prime collision hazard is posed by temporally correlated impacts (coherent catastrophism, Δt ∼ 102–104 yr) rather than random ones (stochastic catastrophism, Δt ∼ 105–108 yr). The mechanism whereby coherent incursions into and through the terrestrial atmosphere occur is described as being the result of giant cometary bodies arriving in orbits with perihelia in the inner solar system. Hierarchical fragmentation of such large (100 km-plus) bodies — due to thermal stresses near perihelion, collisions in the asteroid belt, or passages through the Jovian Roche radius — results in numerous ∼kilometre-sized objects being left in short-period orbits, and appearing in telescopic searches as Apollo-type asteroids. Many more smaller objects, in the 10–100 metre size range and only recently observed, by the Spacewatch team, are expected to be in replenished clusters in particular orbits as a result of continuing disintegrations of large, differentiated, cometary objects. Gravitational perturbations by Jupiter bring these clusters around to have a node at 1 au in a cyclic fashion, leading to impacts at certain times of year every few years during active periods lasting a few centuries, such periods being separated by intervals of a few millennia. Furthermore, fragmentations within the hierarchy result in significant bombardment commensurabilities (Δt ∼ 10–102 yr) during active periods occurring at random intervals (Δt ∼ 102–103 yr). It appears that the Earth has been subject to such impacts since the break-up of such a comet ∼2×104 years ago; currently we are not passing through a high-risk epoch, although some phenomena originating in the products of this break-up have been observed in the 20th century. This most recent hierarchical disintegration, associated with four well-known meteor showers and termed the Taurid Complex, is now recognized as resulting in a dozen apparently asteroidal objects — almost 10% of the discovered Apollo population — as well as Comet P/Encke. A substantial asteroidal remnant of the Taurid progenitor may still be present in resonance with Jupiter. The implications of the existence of any asteroidal or meteoroidal cluster due to the progenitor are briefly discussed. We emphasize finally the relative importance of active and inactive comets in the cratering record, pointing out the potentially significant contribution by disintegrating large comets to the population of inactive Earth-crossers." @default.
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- W4211183491 date "1994-01-01" @default.
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- W4211183491 title "Coherent catastrophism" @default.
- W4211183491 cites W1582608269 @default.
- W4211183491 cites W1938126827 @default.
- W4211183491 cites W1963573117 @default.
- W4211183491 cites W1967062837 @default.
- W4211183491 cites W1967287656 @default.
- W4211183491 cites W1970218404 @default.
- W4211183491 cites W1970805703 @default.
- W4211183491 cites W1974715717 @default.
- W4211183491 cites W1976258848 @default.
- W4211183491 cites W1977782296 @default.
- W4211183491 cites W1980589642 @default.
- W4211183491 cites W1981294626 @default.
- W4211183491 cites W1984135996 @default.
- W4211183491 cites W1984365373 @default.
- W4211183491 cites W1988073997 @default.
- W4211183491 cites W1988764387 @default.
- W4211183491 cites W1992435846 @default.
- W4211183491 cites W1994196866 @default.
- W4211183491 cites W1996973308 @default.
- W4211183491 cites W2000918631 @default.
- W4211183491 cites W2007808043 @default.
- W4211183491 cites W2008721775 @default.
- W4211183491 cites W2009164380 @default.
- W4211183491 cites W2015589430 @default.
- W4211183491 cites W2017712849 @default.
- W4211183491 cites W2022833910 @default.
- W4211183491 cites W2027135516 @default.
- W4211183491 cites W2029818819 @default.
- W4211183491 cites W2030495733 @default.
- W4211183491 cites W2031180454 @default.
- W4211183491 cites W2032831044 @default.
- W4211183491 cites W2034541743 @default.
- W4211183491 cites W2038889610 @default.
- W4211183491 cites W2040717183 @default.
- W4211183491 cites W2042348777 @default.
- W4211183491 cites W2045183272 @default.
- W4211183491 cites W2045184789 @default.
- W4211183491 cites W2046322632 @default.
- W4211183491 cites W2047774735 @default.
- W4211183491 cites W2048886805 @default.
- W4211183491 cites W2050241689 @default.
- W4211183491 cites W2056419210 @default.
- W4211183491 cites W2057273337 @default.
- W4211183491 cites W2059641927 @default.
- W4211183491 cites W2060696757 @default.
- W4211183491 cites W2062624509 @default.
- W4211183491 cites W2065951019 @default.
- W4211183491 cites W2067596796 @default.
- W4211183491 cites W2071054355 @default.
- W4211183491 cites W2072163827 @default.
- W4211183491 cites W2072957247 @default.
- W4211183491 cites W2076995408 @default.
- W4211183491 cites W2079215329 @default.
- W4211183491 cites W2083259519 @default.
- W4211183491 cites W2084088559 @default.
- W4211183491 cites W2088017200 @default.
- W4211183491 cites W2088373942 @default.
- W4211183491 cites W2089716249 @default.
- W4211183491 cites W2090317346 @default.
- W4211183491 cites W2092218083 @default.
- W4211183491 cites W2111408371 @default.
- W4211183491 cites W2113786452 @default.
- W4211183491 cites W2123797370 @default.
- W4211183491 cites W2137685264 @default.
- W4211183491 cites W2160674726 @default.
- W4211183491 cites W2163161637 @default.
- W4211183491 cites W2163562899 @default.
- W4211183491 cites W2165547410 @default.
- W4211183491 cites W4231231331 @default.
- W4211183491 cites W4246395542 @default.
- W4211183491 cites W4248977411 @default.
- W4211183491 cites W4251635744 @default.
- W4211183491 cites W852962153 @default.
- W4211183491 cites W2004009781 @default.
- W4211183491 doi "https://doi.org/10.1016/0083-6656(94)90002-7" @default.
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