Evidence for a cataclysm ~4.0-3.8 Gy ago

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A LATE HEAVY BOMBARDMENT ?The Moon's bombardment was much more intence 3,6 Giga yearsago than now.Problem: what wasits temporalevolution ?Monotonic decrease,or possible peaks ??Cataclysmic LHB(Tera, Ryder, Kring,Cohen, Koeberl..)Slowly fading LHB(Neukum, Hartman..)
A LATE HEAVY BOMBARDMENT ?Evidence for a cataclysm ~4.0-3.8 Gy ago:The ages of the rocks collected on the Moon cluster at~3.9-3.8 Gy, and rocks older than 4 Gy are extremely rare.Suggests a disastrous sudden and short-lived crateringepisode about 3.9 Gy ago, which distroyed all primoridalrocks, resetting their ages (Tera et al., 1974)Counter-argument:A very heavy, time declining, bombardment, could producethe same effect (Hartung, 1974; Hartmann, 1975, 1980,Grinspoon, 1989)
Page 1 and 2: PLANETARY FORMATION5) THE SOLAR SYS
Page 3 and 4: MIGRATION in the SOLAR SYSTEMA gian
Page 5: MIGRATION in the SOLAR SYSTEMIn add
Page 8 and 9: MIGRATION in the SOLAR SYSTEMAs the
Page 10 and 11: MIGRATION in the SOLAR SYSTEMOnce t
Page 12 and 13: A LATE HEAVY BOMBARDMENT ?
Page 16 and 17: Evidence for acataclysm ~4.0-3.8Gy
Page 18 and 19: A LATE HEAVY BOMBARDMENT ?Evidence
Page 20 and 21: A LATE HEAVY BOMBARDMENT ?
Page 22 and 23: A LATE HEAVY BOMBARDMENT ?Some fact
Page 24 and 25: PLANETESIMALS DRIVEN MIGRATION
Page 30 and 31: PLANETESIMALS DRIVEN MIGRATION~1%
Page 36 and 37: PLANETESIMALS DRIVEN MIGRATIONEject
Page 38 and 39: The NICE MODEL
Page 40 and 41: The NICE MODELR. Gomes, H.F. Leviso
Page 42 and 43: The NICE MODELII: A cometaryand ast
Page 44 and 45: JUPITER's TROJANSAt the moment of t
Page 46 and 47: JUPITER's TROJANSSimulations show t
Page 48 and 49: IRREGULAR SATELLITES
Page 50 and 51: IRREGULAR SATELLITES
Page 52 and 53: IRREGULAR SATELLITESUranusNeptuneSa
Page 54 and 55: KUIPER BELT ORIGINDuring the outwar
Page 56 and 57: KUIPER BELT ORIGINDistribution in i
Page 58 and 59: KUIPER BELT ORIGINReproduction of t
Page 60: CONCLUSIONSAlthough the distributio

Evidence for a cataclysm ~4.0-3.8 Gy ago

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