Kinematics of large terrestrial impact crater formation inferred from structural analysis and three-dimensional block modeling of the Vredefort Dome, South Africa

A groundbreaking analysis of the Vredefort Dome, South Africa's central uplift from a massive impact structure, reveals that its formation involved centripetal rock movement followed by radial spreading. This challenges prevailing models that attribute distortion primarily to concentric normal faults. Instead, the study demonstrates that folding on a hundred-meter scale and the mechanical coherence of strata played pivotal roles in shaping the dome. Using field-based structural analysis and three-dimensional block modeling, researchers estimated the transient cavity diameter at approximately 70 km, providing critical insights into the kinematics of large terrestrial impact crater formation.

Jahn, A., & Riller, U. Kinematics of large terrestrial impact crater formation inferred from structural analysis and three-dimensional block modeling of the Vredefort Dome, South Africa. Large Meteorite Impacts and Planetary Evolution V, 85–97. https://doi.org/10.1130/2015.2518(05)