Cretaceous-Tertiary (Chicxulub) impact angle and its consequences

摘要: The Chicxulub impact structure exhibits asymmetries in its geophysical signatures that closely resemble produced by oblique impacts laboratory experiments and recognized on planetary surfaces. These asymmetric suggest a trajectory for the bolide from southeast to northwest at 20°–30° angle horizontal. As result, biotic extinctions may have been most severe catastrophic Northern Hemisphere. Geographic variation magnitude of Cretaceous-Tertiary (K-T) “fern spike” palynofloral are consistent with proposed trajectory.