NASA rovers such as Viking 1.2; Pathfinder; Spirit; Opportunity; Phoenix; Curiosity collected and transmitted photo documents and data of the mineralogical and material composition of Martian sedimentary rocks. Analysis of the accumulated factual basis gives grounds for concluding that sedimentary rock formation on Mars, as on Earth, proceeded under the influence of gravitational, cryogenic, aeolian and fluvial factors, the interrelation between which was determined by the activity of physical and chemical weathering processes. Also meteorite and volcanic material participated in the formation of sedimentary rocks. It is possible to discover deposits of Fe, Mn, U, rare earth elements, noble metals, Cu, Pb, Zn, B, Ba, Sr, P, various salts and water on Mars. © 2020, Univelt Inc. All rights reserved.