The fall, recovery, and classification of the Park Forest meteorite

Simon, S.B.; Grossman, L.; Clayton, Robert N.; Mayeda, T. K.; Schwade, J. R.; Sipiera, P. P.; Wacker, J. F.; Wadhwa, M.

doi:10.1111/j.1945-5100.2004.tb00925.x

Cited by 31 publications

(39 citation statements)

References 15 publications

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“…This is due to winds prevailing during fall as nicely shown in the Park Forest strewn field case (Simon et al 2004). The JaH 073 strewn field shows no deflection due to winds (Fig.…”

Section: Field Datamentioning

confidence: 64%

“…But so far only seven cases are known where preatmospheric orbits could be well determined and meteoroid material reached the ground and was found. Out of these seven recorded falls only the Tagish Lake (Brown et al 2002), Park Forest (Simon et al 2004), and Villalbeto de la Peña (Llorca et al 2005) produced important strewn fields. Unfortunately, these three falls occurred either in hilly locations including lakes or in densely populated areas.…”

Section: Introductionmentioning

confidence: 99%

“…The production of stable isotopes or radionuclides due to exposure to cosmic rays (e.g., Begemann et al 1996;Ferko et al 2000;Welten et al 2001;Welten et al 2003) can also be used to estimate the original size and mass of the meteoroid. In complex cases with multiple exposure histories, however, estimates from light curve data and cosmogenic nuclides for the same material may vary by a factor of 10 (Simon et al 2004).…”

Section: Introductionmentioning

confidence: 99%

“…Although large meteorite strewn fields are relatively rare, data for several such strewn fields were reported in the last two centuries. Examples are Holbrook (Foote 1912), Mbale (Jenniskens et al 1994), Norton County (LaPaz 1965), Mócs (Koch 1882), Tenham (Brooks et al 1964), Allende (Clarke et al 1970), Camel Donga (Bevan et al 1986;Cleverly et al 1986), Murchison (Fuchs et al 1973), Gold Basin (Kring et al 2001), an L6 and CO3 strewn field in the Libyan desert (Schlüter et al 2002) and Park Forest (Simon et al 2004). Large showers with many stones were also recognized in Antarctica in the Allan Hills (Nishiizumi et al 1989), the Elephant Moraine (Grossman 1994), and the Frontier Mountains (Welten et al 2006a) regions.…”

Section: Introductionmentioning

confidence: 99%

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The Jiddat al Harasis 073 strewn field, Sultanate of Oman

Gnos

Lorenzetti

Eugster

et al. 2009

Meteorit & Planetary Scien

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Abstract-The recently discovered Jiddat al Harasis (JaH) 073 strewn field is the largest found so far in the Sultanate of Oman, covering an area of 19 × 6 km. The 3463 single stones collected range in weight from 52.2 kg down to <1 g (total weight 600.8 kg) and show a pronounced mass sorting. The strewn field shape can be approximated by a NW-SE-oriented ellipsoid, indicating an atmospheric entry from SE at a low angle relative to the surface. The meteorite belongs to the L6 ordinary chondrite group and shows S4 average shock grade. Smaller stones generally show a higher weathering grade resulting in a spread from W2 and W4. Enhanced weathering of the stones causing fragmentation after the fall is observed in sandy depressions. Five 14 C measurements on stones of variable size and weathering grade yielded 14 C from 3.8 to 49.9 dpm/kg. Three samples give a 14 C/ 10 Be age consistent with about 14.4 ka. For two samples the cosmogenic, trapped, and radiogenic noble gases were measured. The ratio of the 4 He and 40 Ar gas retention ages of 0.29 ± 0.10 and that of the 3 He and 21 Ne cosmic ray exposure ages of 0.36 ± 0.08 Ma indicate that JaH 073 experienced a complex exposure history and lost 4 He and 40 Ar due to a major collision. Fragmentation statistics indicate a single major atmospheric disruption and an originally relatively spherical shape of the object. Assuming the material collected represents the majority of fallen mass, and 90-99% of the original weight was lost by ablation, the pre-atmospheric minimum radius of the meteoroid with density 3.4 g cm −3 would have been at least 75 cm.

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“…This is due to winds prevailing during fall as nicely shown in the Park Forest strewn field case (Simon et al 2004). The JaH 073 strewn field shows no deflection due to winds (Fig.…”

Section: Field Datamentioning

confidence: 64%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Jiddat al Harasis 073 strewn field, Sultanate of Oman

Gnos

Lorenzetti

Eugster

et al. 2009

Meteorit & Planetary Scien

View full text Add to dashboard Cite

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“…For smaller events, fragmentation along the trajectories of bolides, which leads to the formation of strewn fields (e.g. Simon et al 2004), would need to be assessed. For much larger events, impacts on a global scale would need to be assessed too.…”

Section: Discussionmentioning

confidence: 99%

Risk assessment of Tunguska-type airbursts

2010

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The Tunguska airburst, which devastated a taiga forest over an area greater than 2,000 km 2 in a remote region of Central Siberia in 1908, is a classic example of extraterrestrial encounter discussed in the asteroid/comet impact hazard and risk assessment literature (e.g. Longo 2007;Carusi et al. 2007). Although it is generally agreed that the cosmic body caused damage by bursting in the air rather than through direct impact on the Earth's surface, the Tunguska event is often referred to as an impact event. To the best of our knowledge, no detailed studies have been performed to quantify the risk of a similarsized event over a populated region. We propose here a straightforward probabilistic risk model for Tunguska-type events over the continental United States and use established risk metrics to determine the property (buildings and contents) and human losses. We find an annual average property loss of *USD 200,000/year, a rate of *0.3 fatalities/year and *1.0 injuries/year ranging from a factor 3 below and to a factor 3 above the indicated values when a reasonable rate uncertainty for Tunguska-type events is taken into account. We then illustrate the case of an extreme event over the New York metropolitan area. While we estimate that this ''nightmare'' scenario would lead to *USD 1.5 trillion of property loss, *3.9 millions of fatalities and *4.7 millions of injuries, such event is almost impossible (occurrence once every *30 million years) and should only be considered as an illustrative example.

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