ИСТИНА

The Holden crater is located on Margaritifer Terra, which is in the Uzboi-Ladon-Morava (ULM) outflow channel system. It formed in the Noachian period and caused redistribution of water flows and deposition of a series of layers of clay-bearing materials on the crater floor. The existing research results generally reveal that the Holden impact crater experienced lacustrine and/or distal alluvial low-energy deposition and high-energy alluvial or glacial deposition from the Uzboi water body, these two processes correspondingly formed the lower and the upper sediment unit . To reveal accurate geological structure and historical development process, we use HiRISE images and the digital terrain models (DTM) and stereo images generated by them to study outcrops of other layered sediments in the SW portion of the crater and assess their lateral extension and correlation.