The article discusses the geological features of the Lower Cretaceous period in a specific area of Mongolia. The researchers found that the area's evolution was influenced by fault movements and other geological factors. They identified different types of sedimentary environments, such as fan deltas and underwater fans, and noted variations in the development of rocks and reservoirs. The study also revealed the presence of good quality source rocks with organic materials suitable for oil generation. Additionally, the researchers observed that sand bodies were well-developed in certain areas, but the overall reservoir quality was relatively poor.