Allwood, Abigail C.; Grotzinger, John P.; Knoll, Andrew Herbert; Burch, Ian W.; Anderson, Mark S.; Coleman, Max L.; Kanik, Isik(Proceedings of the National Academy of Sciences of the United States of America, 2009)Link to Published Version
Knoll, Andrew; Fischer, Woodward W.; Pruss, Sara; Payne, Jonathan L.; Bambach, Richard K.(Earth and Planetary Science Letters, 2007)Link to Published Version