Current sequence stratigraphic concepts and models were mostly designed for the analysis of marine basins. In this context, relative sea-level changes are considered one of the key elements controlling stacking patterns, types of systems tracts, and the origin of sequence boundaries. In these models, sea level changes deeply controlled the available accommodation space for sediment accumulation. ... [Show full abstract] The origin of eustatic sea level changes has been related to changes in the volume of water in the oceans (mostly controlled by glacio-eustacy) and the capacity of ocean basins (mainly controlled by the spread velocity of ocean ridges). These sea level changes occur along cycles of different duration, from 10-100 Ky (5 th order) up to 100-1.000 My (1 st order). In contrast, in lacustrine basins the lake level can be highly variable, which can directly affect the accommodation space and in consequence the stacking pattern and the overall geometry of the related deposits. Caroll and Bohacs (1999) recognized three situations for lacustrine sedimentation, termed underfilled (closed) lakes, balanced-filled (partially closed) lakes and overfilled (open) lakes. These conditions result from the interplay between sediment/water supply and basin subsidence. Rivers are largely the most important (>95%) contributors of clastic sediments in marine and lacustrine basins (Syvitski et al., 2003). Sediment supply by rivers is always associated with the introduction of a huge volume of freshwater. In the case of underfilled (closed) lakes, the excess of water results in raising lake level (transgressive) conditions. As an example, the single supply of a 1 m3 of fine-grained sand by a dirty river with 10kg/m3 of suspended load will require the introduction of 224 m3 of water. Of course, in the stratigraphic record we only can see the sediments and not the water. The transgressive conditions related to the sediment supply can be recognized by the existence of costal onlap and the accumulation of thinning and finning upward small depositional sequences. Since sediment supply is directly linked with an increase in the accommodation space, large-scale progradations are not possible in underfilled lakes. In contrary, in overfilled lakes the excess of water provided by river discharges is drained out through the spill point, and doesn't affect the accommodation space. In consequence, sediment supply can result in large scale progradations (clinoforms) which can be recognized also in seismic. Many lacustrine basins show a fining-and then coarsening-upward sedimentary infill, resulting from a complete evolution starting with an initial underfilled condition, followed by a balanced fill and finally an overfilled condition. The onset between underfilled and balanced filled condition is often recognized after the maximum lake flooding, and is marked by the breaching of the spill point. In the Triassic Yanchang Formation (Ordos Basin, China) the underfilled condition is recognized for Chang 10-Chang 7 Members (Zavala et al. 2021). The breaching of the spill point is recognized during Chang 7 (maximum flooding), and is characterized by the existence of incised valleys. During the Chang 6-Chang 1 members the Yanchang lake evolved into balanced and finally overfilled conditions, which favored the development of large-scale clinoforms. The near-stable lake level during the overfilled conditions registered during the Chang 1-Chang 2 members can explain the existence of extended delta plains with associated coal deposits.