The paleosols, due to their potential as paleoenvironmental and stratigraphic proxies, are widely used in studies of paleolandscape and paleoclimate reconstructions. As it constitutes one of the main climatic elements, the mapping of precipitation represents an indispensable factor in the determination of climatic conditions. Thus, the article aimed to map the distribution patterns of Maastrichtian paleoprecipitation from the Bauru Basin, Upper Cretaceous of Brazil, through the use of paleosols as proxies, climofunctions, and geostatistical interpolation of data. The results revealed an average of 683 mm for the Brazilian Maastrichtian, confirming the predominance of the semi-arid climate for the Marília Formation. Maastrichtian paleoprecipitation mapping of the Bauru Basin, using paleosols, climatic functions, and environmental modeling by geostatistical interpolation, showed a scenario of favorable rainfall for the development of paleosols with Bk, Bg, Bss, and Bt horizons, reaching consensus with most previous studies on the climate scenario of the Marília Formation, Late Cretaceous of Brazil.

古土壤由于其作为古环境和地层代理的潜力，被广泛用于古景观和古气候重建的研究。由于它构成了主要的气候要素之一，因此降水制图是确定气候条件不可或缺的因素。因此，本文旨在绘制上白垩统包鲁盆地马斯特里赫特古降水的分布模式巴西，通过使用古土壤作为代理、气候函数和数据的地统计插值。结果显示，巴西马斯特里赫特人的平均高度为 683 毫米，证实了 Marília 组以半干旱气候为主。Bauru 盆地的马斯特里赫特古降水绘图，使用古土壤、气候函数和地统计插值的环境模拟，显示了有利降雨的情景，有利于 Bk、Bg、Bss 和 Bt 层位的古土壤发育，与之前大多数关于巴西晚白垩世 Marília 组的气候情景。