Search Results - "Hartmann, William K"

History of the Terminal Cataclysm Paradigm: Epistemology of a Planetary Bombardment That Never (?) Happened by Hartmann, William K.

“…This study examines the history of the paradigm concerning a lunar (or solar-system-wide) terminal cataclysm (also called “Late Heavy Bombardment” or LHB), a…”
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Martian cratering 8: Isochron refinement and the chronology of Mars by Hartmann, William K.

“…This paper reviews and refines the technique of dating martian surfaces by using impact-crater isochrons (defined as size distributions of impact craters on…”
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Origin and history of ureilitic material in the solar system: The view from asteroid 2008 TC3 and the Almahata Sitta meteorite by Goodrich, Cyrena Anne, Hartmann, William K., O'Brien, David P., Weidenschilling, Stuart J., Wilson, Lionel, Michel, Patrick, Jutzi, Martin

“…Asteroid 2008 TC3 (approximately 4 m diameter) was tracked and studied in space for approximately 19 h before it impacted Earth's atmosphere, shattering at…”
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Cratering Chronology and the Evolution of Mars by Hartmann, William K, Neukum, Gerhard

“…Results by Neukum et al. (2001) and Ivanov (2001) are combined with crater counts to estimate ages of Martian surfaces. These results are combined with studies…”
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Very low strengths of interplanetary meteoroids and small asteroids by POPOVA, Olga, BOROVIČKA, Jiří, HARTMANN, William K., SPURNÝ, Pavel, GNOS, Edwin, NEMTCHINOV, Ivan, TRIGO-RODRÍGUEZ, Josep M.

“…– We have assembled data on 13 cases of meteorite falls with accurate tracking data on atmospheric passage. In all cases, we estimate the bulk strength of the…”
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Confirmation and utilization of the “production function” size-frequency distributions of Martian impact craters by Hartmann, William K., Neukum, Gerhard, Werner, Stephanie

“…On any planetary surface, impacts of interplanetary bodies create an initial (or “production function”) size‐frequency distribution (SFD) of impact craters…”
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Selective sampling during catastrophic disruption: Mapping the location of reaccumulated fragments in the original parent body by Michel, Patrick, Jutzi, Martin, Richardson, Derek C., Goodrich, Cyrena A., Hartmann, William K., O׳Brien, David P.

“…In this paper, we simulate numerically the catastrophic disruption of a large asteroid as a result of a collision with a smaller projectile and the subsequent…”
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Martian flow features, moraine-like ridges, and gullies: Terrestrial analogs and interrelationships by Arfstrom, John, Hartmann, William K.

“…Ridges that resemble terrestrial moraines are commonly visible at the foot of many mid-latitude crater walls in Mars Global Surveyor Mars Orbiter Camera…”
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Effects of early intense bombardment on megaregolith evolution and on lunar (and planetary) surface samples by Hartmann, William K., Morbidelli, Alessandro

“…Impact rates in the first 500 Myr of the solar system are critical to an understanding of lunar geological history, but they have been controversial. The…”
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Elysium Planitia lava flows: Crater count chronology and geological implications by Hartmann, William K., Berman, Daniel C.

“…Mars Global Surveyor (MGS) and Viking images allow analysis of chronological and geological relations among lava flows in southern Elysium Planitia, based on…”
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The giant impact hypothesis: past, present (and future?) by Hartmann, William K.

“…At the request of editors, this paper offers a historical review of early work on the giant impact hypothesis, as well as comments on new data. The author…”
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The role of arcuate ridges and gullies in the degradation of craters in the Newton Basin region of Mars by Berman, Daniel C., Hartmann, William K., Crown, David A., Baker, Victor R.

“…A survey of craters in the vicinity of Newton Basin, using high-resolution images from Mars Global Surveyor and Mars Odyssey, was conducted to find and analyze…”
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Chelyabinsk, Zond IV, and a possible first-century fireball of historical importance by Hartmann, William K.

“…The well‐recorded Chelyabinsk event, the Tunguska event, and the re‐entry of the Zond IV vehicle offer opportunities to compare reactions of modern…”
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SIMS U‐Pb dating of micro‐zircons in the lunar meteorites Dhofar 1528 and Dhofar 1627 by Zhang, Bidong, Lin, Yangting, Hao, Jialong, Schrader, Devin L., Wadhwa, Meenakshi, Korotev, Randy L., Hartmann, William K., Bouvier, Audrey

“…About half of the lunar meteorites in our collections are feldspathic breccias. Acquiring geochronologic information from these breccias is challenging due to…”
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Comment on “Chelyabinsk, Zond IV, and a possible first‐century fireball of historical importance” by Hartmann, William K., Forte, Alexander, SABYR, Alina

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Dynamical sequestration of the Moon-forming impactor in co-orbital resonance with Earth by Kortenkamp, Stephen J., Hartmann, William K.

“…•We explore Earth's co-orbital resonance as a potential source of the Moon-forming impactor.•Mars-mass co-orbital companions of Earth at 1 AU can persist for…”
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Martian cratering 9: Toward resolution of the controversy about small craters by Hartmann, William K.

“…The Malin et al. [Malin, M.C., Edgett, K., Posiolova, L., McColley, S., Noe Dobrea, E., 2006. Science 314, 1573–1577] report of ongoing production of decameter…”
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Martian cratering 12. Utilizing primary crater clusters to study crater populations and meteoroid properties by Hartmann, William K., Daubar, Ingrid J., Popova, Olga, Joseph, Emily C. S.

“…Images from Mars Global Surveyor and later images from Mars Reconnaissance Orbiter reveal that roughly half of the meteoroids striking Mars (at meter to few…”
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Do young martian ray craters have ages consistent with the crater count system? by Hartmann, William K., Quantin, Cathy, Werner, Stephanie C., Popova, Olga

“…McEwen et al. (McEwen, A.S., Preblich, B.S., Turtle, E.P., Artemieva, N.A., Golombek, M.P., Hurst, M., Kirk, R.L., Burr, D.M., Christensen, P. [2005]. Icarus…”
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Young Martian crater Gratteri and its secondary craters by Quantin, Cathy, Popova, Olga, Hartmann, William K., Werner, Stephanie C.

“…In response to questions that have been raised about formation and effects of secondary craters on crater chronometry techniques, we studied properties of the…”
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