The excavation of a meteorite crater near Haviland, Kansas

Nininger, H. H.; Figgins, J. D.

doi:10.2475/ajs.s5-28.166.312

Cited by 11 publications

(12 citation statements)

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“…To model the flight, atmospheric entry, and breakup of the Agoudal meteorite, we used the separated fragments (SF) model (Artemieva and Shuvalov 2001;Bland and Artemieva 2006) with the following initial conditions: an iron spherical body with a density of 7800 kg m À3 , strength of 4.4 9 10 7 Pa (for 1 kg sample; Zotkin and Tsvetkov 1983), and ablation coefficient of 0.07 s 2 km À2 in accordance with theoretical calculations (ReVelle and Rajan 1988), and with observations of U.S. Nininger and Figgins (1933); [10] Krinov (1971).…”

Section: Methodsmentioning

confidence: 99%

Formation of a small impact structure discovered within the Agoudal meteorite strewn field, Morocco

Lorenz

Ivanova

Artemieva

et al. 2014

Meteorit & Planetary Scien

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A relic impact structure was recognized within the strewn field of the Agoudal iron meteorite. The heavily eroded structure has preserved shatter cones in a limestone basement, and remnants of autochthonous and allochthonous breccias. Fragments of iron incorporated into the allochthonous breccia have a chemical composition (Ni = 5.16 wt%, Ir = 0.019 ppm) similar to that of the Agoudal meteorite, supporting a syngenetic origin of the strewn field and the impact structure. The total recovered mass of Agoudal meteorite fragments is estimated at approximately 500 kg. The estimated size of the SE–NW‐oriented strewn field is 6 × 2 km. Model calculations with minimal preatmospheric size show that a similar meteorite strewn field plus one small crater with observed shock effects could be formed by fragmentation of a meteoroid approximately 1.4 m in diameter with an impact angle of approximately 60° from the horizontal. However, the most probable is an impact of a larger, 3–4 m diameter meteoroid, resulting a strewn field with approximately 10 craters, 10–30 m in diameter each, plus numerous meteorite fragments. The calculated scattering area of meteorite shrapnel ejected from these impact craters could completely cover the observed strewn field of the Agoudal meteorite.

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Section: Methodsmentioning

confidence: 99%

Formation of a small impact structure discovered within the Agoudal meteorite strewn field, Morocco

Lorenz

Ivanova

Artemieva

et al. 2014

Meteorit & Planetary Scien

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“…The smallest crater in Table I is the Haviland Crater. Also called the Brenham Crater, it is a meteorite crater in Kiowa County, Kansas [10]. The oval-shaped crater is roughly 15 meters.…”

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The Kamil Crater in Egypt

Folco

Martino

Barkooky

et al. 2010

Science

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We report on the detection in southern Egypt of an impact crater 45 meters in diameter with a pristine rayed structure. Such pristine structures are typically observed on atmosphereless rocky or icy planetary bodies in the solar system. This feature and the association with an iron meteorite impactor and shock metamorphism provides a unique picture of small-scale hypervelocity impacts on Earth's crust. Contrary to current geophysical models, ground data indicate that iron meteorites with masses of the order of tens of tons can penetrate the atmosphere without substantial fragmentation.

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“…Shallow depressions, mistakenly labeled as small playas and buffalo wallows, make up ~ 80 ha of the strewn eld. 12 While ponding occurs in the hollows and bison were extirpated from the area in 1886, most of these depressions are impact craters.…”

Section: Resultsmentioning

confidence: 99%

The Brenham impact event, 693-552 years ago (1329-1470 CE)

Tankersley

Meyers

Stimpson³

et al. 2023

Preprint

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More than 10,000 kg of pallasites, micrometeorites (< 4 mm), positive Ir and Pt anomalies, and ~ 80 ha of impact craters have been found across an ~ 800 ha strewn field on the late Holocene surface of Kiowa County, Kansas. A suite of six AMS radiocarbon ages demonstrate that a cosmic impact event occurred sometime between 693 and 552 years ago, 1329–1470 CE. This event is recorded in Native American oral histories and petroglyphs located near the strewn field. Hopewell artifacts in the Ohio River valley postdate the impact event by more than 1,000 years. The Brenham impact event increases our understanding of the occurrence and effect of cosmic events on humans.

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The excavation of a meteorite crater near Haviland, Kansas

Cited by 11 publications

References 0 publications

Formation of a small impact structure discovered within the Agoudal meteorite strewn field, Morocco

Formation of a small impact structure discovered within the Agoudal meteorite strewn field, Morocco

The Kamil Crater in Egypt

The Brenham impact event, 693-552 years ago (1329-1470 CE)

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