Evidence for a cataclysm ~4.0-3.8 Gy ago
Evidence for a cataclysm ~4.0-3.8 Gy ago
Evidence for a cataclysm ~4.0-3.8 Gy ago
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
A LATE HEAVY BOMBARDMENT ?A key issue: did the LHB concern also the outersolar system?Iapetus suffered a HeavyBombardment (> 100x thecurrent bombardmentintegrated over the age of thesolar system: Zahnle et al.)Was this bombardment late?It seems so.Ejecta blankets from basinsoverlap the equatorial ridgewhich should have <strong>for</strong>med at200-800 My (Castillo et al.,Icarus, 2007). Moreover, thesatellite crust could not haveretained basins be<strong>for</strong>e 100My.