Science. 1993 Sep 17;261(5128):1564-7. doi: 10.1126/science.261.5128.1564.
The buried Chicxulub impact structure in Mexico, which is linked to the Cretaceous- Tertiary (K-T) boundary layer, may be significantly larger than previously suspected. Reprocessed gravity data over Northern Yucatan reveal three major rings and parts of a fourth ring, spaced similarly to those observed at multiring impact basins on other planets. The outer ring, probably corresponding to the basin's topographic rim, is almost 300 kilometers in diameter, indicating that Chicxulub may be one of the largest impact structures produced in the inner solar system since the period of early bombardment ended nearly 4 billion years ago.
墨西哥的奇克苏卢布埋藏撞击结构与白垩纪-第三纪（K-T）界线层有关，其可能比之前所怀疑的要大得多。重新处理的北尤卡坦重力数据显示出三个主要的环，以及第四个环的部分，其间距与在其他行星上的多环撞击盆地中观察到的相似。外环，可能对应于盆地的地形边缘，直径几乎为 300 公里，这表明奇克苏卢布可能是自近 40 亿年前早期轰炸结束以来在内太阳系中产生的最大撞击结构之一。
