Delta Deposit at Jezero Crater (IMAGE) Brown University Caption Jezero Crater on Mars was home to an ancient lake system. Two inlet channels that fed the lake have large delta-like formations where sediment was dumped in the lake. Those deltas record the history of two separate water events in the Jezero region. Credit NASA/MSSS Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.