In a March 2015 paper, researchers from Brown University described how an ancient Martian lake system existed in Jezero. The study advanced the idea that water filled the crater at least two separate times. There are two channels on the northern and western sides of the crater that probably supplied it with water; each of these channels has a delta-like deposit where sediment was carried by water and deposited in the lake. Craters of a given diameter are expected to have a certain depth; a depth less than expected means sediment entered the crater. Calculations suggest that the crater may hold about of sediments. Most of the sediments may have been brought in by channels.
