Spitzer Evidence for a Late Heavy Bombardment and the Formation of Urelites in η Corvi at ~1 Gyr Lisse, C. M. ; Chen, C. H. ; Wyatt, M. C. ; Morlok, A. ; Thebault, P. ; Sitko, M. ; Watson, D. M. ; Manoj, P. ; Sheehan, P. ; Currie, T. M. Abstract Publication: Workshop on the Early Solar System Bombardment II Pub Date: February 2012 Bibcode: 2012LPICo1649...43L