Large-scale megaripples have been recognized in a petroleum industry 3D seismic horizon near the Cretaceous/Paleogene (K-Pg) boundary. These features occur at the top of the Cretaceous/Paleogene Boundary Deposit (KPBD) which is a “cocktail” of mass transport deposits and debris widely recognized as resulting from the impact of a large bolide 66 million years ago (Ma) creating the Chicxulub impact crater on the northwestern corner of the Yucatan Peninsula of Mexico. We examine the seismic data and associated well-logs and conclude that the features are megaripples caused by the tsunami resulting from the impact. These megaripples are preserved as a result of having formed below storm wave base and being buried by Paleocene deep water shales. This association suggests that the Chicxulub impact is the single cause for the KPBD, the megaripples, and the end of the Mesozoic.

在白垩纪/古近纪 (K-Pg) 边界附近的石油工业 3D 地震层位中已经识别出大规模的巨型波纹。这些特征出现在白垩纪/古近纪边界矿床 (KPBD) 的顶部，该矿床是大规模运输沉积物和碎片的“鸡尾酒”，被广泛认为是 6600 万年前 (Ma) 造成希克苏鲁伯撞击的大型火流星撞击造成的墨西哥尤卡坦半岛西北角的火山口。我们检查了地震数据和相关的测井记录，并得出结论，这些特征是由撞击引起的海啸引起的巨型涟漪。这些巨型波纹由于形成于风暴波底部下方并被古新世深水页岩掩埋而得以保存。这种关联表明，希克苏鲁伯撞击是 KPBD、巨波纹、