Calculation of Planetary Impact Cratering to Late Times T. J. Ahrens, J. D. O’Keefe, and S. T. Stewart Dynamic Tensile Strength of Crustal Rocks and Applications to Impact Cratering H. Ai and T. J. Ahrens The Evolution of Oblique Impact Flow Fields Using Maxwell’s Z Model J. L. B. Anderson, P. H. Schultz, and J. T. Heineck Oblique Impact and Its Ejecta — Numerical Modeling N. A. Artemieva and E...

[1] A fresh, 1.85 km diameter impact crater in the midlatitudes of Mars (38°N) named Vaduz exhibits distinctive crater‐related geological subunits (facies) extending up to ∼15 radii from the rim crest and perched >10 m above the adjacent plains. Knobby terrain fringing and underlying the facies is interpreted as degraded thermal contraction crack polygons, consistent with an ice‐rich mantle bur...

Introduction: The Silverpit impact structure was discovered during 2001 on three-dimensional (3D) seismic data obtained during routine hydrocarbon exploration in the southern North Sea [1]. It is now known that five commercially-acquired 3D seismic datasets partially cover the structure and approximately 80% of Silverpit is imaged by high-resolution 3D data (Figure 1). Two boreholes had been dr...

As outer space image acquisition techniques progress, larger amounts of planetary data sets become available. Impact crater statistics about planets is an important resource as use of this information reveals geological history. Since manual detection of impact craters requires substantial human resource, there is a compelling need to investigate automated crater detection algorithms. In this s...

available online at http://meteoritics.org A meteorite crater on Earth formed on September 15, 2007: The Carancas hypervelocity impact G. TANCREDI1*, J. ISHITSUKA2, P. H. SCHULTZ3, R. S. HARRIS3, P. BROWN4, D. O. REVELLE5, K. ANTIER6, A. LE PICHON6, D. ROSALES2, E. VIDAL2, M. E. VARELA7, L. SÁNCHEZ8, S. BENAVENTE9, J. BOJORQUEZ10, D. CABEZAS2, and A. DALMAU2 1Dpto. Astronomía, Fac. Ciencias, Ig...

The formation and structure of the Orientale basin on the Moon has been extensively studied in the past; however, estimates of its transient crater size, excavated volume and depth, and ejecta distribution remain uncertain. Here we present a new numerical model to reinvestigate the formation and structure of Orientale basin and better constrain impact parameters such as impactor size and veloci...

Using the cometary nucleus model developed by Espinasse et al. (1991), we calculate the thermodynamical evolution of Comet 9P/Tempel 1 over a period of 360 years. Starting from an initially amorphous cometary nucleus which incorporates an icy mixture of H2O and CO, we show that, at the time of Deep Impact collision, the crater is expected to form at depths where ice is in its crystalline form. ...

The Pretoria Saltpan crater is a well-preserved 220,000 year-old, 1.13 km-diameter, simple impact crater. The crater was formed in Nebo granites of the Bushveld Complex. Some minor intrusions thought to be younger than the Nebo granite are present at the crater and have earlier been believed to support a volcanic origin of the structure, but recent geological studies showed them to be part of t...

Rockfall impact is one of the fatal hazards in pipeline transportation of oil and gas. The deformation of oil and gas pipeline caused by rockfall impact was investigated using the finite element method in this paper. Pipeline deformations under radial impact, longitudinal inclined impact, transverse inclined impact, and lateral eccentric impact of spherical and cube rockfalls were discussed, re...

0019-1035/$ see front matter 2010 Elsevier Inc. A doi:10.1016/j.icarus.2010.03.032 * Corresponding author at: Room No. 122, Main Bu Research Institute, Council of Scientific and Industria Uppal Road, Hyderabad 500 606, Andhra Pradesh, Ind E-mail addresses: [email protected], senthil@ Hydrogeological modification of Meteor Crater produced a spectacular set of gullies throughout the interior ...