A Tunguska Sized Airburst Destroyed Tall el-Hammam a Middle Bronze Age City in the Jordan Valley Near the Dead Sea (Expanded)

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F25%3A10499892" target="_blank" >RIV/00216208:11310/25:10499892 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=b-RX9Zc5YQ" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=b-RX9Zc5YQ</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.14293/ACI.2025.0003" target="_blank" >10.14293/ACI.2025.0003</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A Tunguska Sized Airburst Destroyed Tall el-Hammam a Middle Bronze Age City in the Jordan Valley Near the Dead Sea (Expanded)

Popis výsledku v původním jazyce

We present evidence that Tall el-Hammam, a fortified Middle Bronze Age city in the Jordan Valley, was destroyed by an extraordinary high-energy event in approximately 1650 BCE. Excavations reveal that more than 12 m of a palace complex and a massive mudbrick rampart were leveled, and widespread fatalities occurred, with all skeletal remains displaying significant disarticulation. The entire city is capped by a ~1.5 m-thick charcoal-and-ash-rich destruction layer containing shock-metamorphic and high-temperature materials. This stratum yields abundant shocked quartz, vesicular melted pottery and mudbrick, diamond-like carbon, soot, Fe- and Si-rich microspherules, and CaCO3 spherules derived from melted plaster. SEM/TEM imaging with EDS and electron backscatter diffraction (EBSD) identified planar deformation features and high-pressure mineral phases diagnostic of shock metamorphism. Metallic micro-droplets of platinum, iridium, nickel, gold, silver, zircon, chromite, and quartz imply transient exposure to temperatures exceeding 2000°C.Scattered debris fields (potsherds, charred grain, charcoal, and bone fragments) exhibit a coherent southwest-to-northeast dispersal pattern consistent with a directed supersonic shock wave. Anomalously high salt concentrations (~4 wt%) in the destruction layer provide evidence for the vaporization of Dead Sea brines or sedimentary salts, producing hypersaline soils that appear to have inhibited agriculture. This environmental breakdown coincides with an enigmatic ~300-600-year regional abandonment of Tall el-Hammam and surrounding settlements in the lower Jordan River Valley. Some researchers suggest that an oral tradition of this catastrophe may have been preserved in the biblical narrative of the destruction of Sodom.The observed suite of shock, melt, and geochemical signatures cannot be explained by natural disasters, fires, earthquakes, lightning, anthropogenic activity, or warfare. We therefore propose a cosmic airburst by a comet or asteroid of &quot;super-Tunguska&quot; magnitude - several times larger than the 1908 Tunguska event. To test this hypothesis, we conducted hydrocode simulations of a Type-II &quot;touchdown&quot; airburst (an airburst whose fireball reaches Earth&apos;s surface), reproducing a high-velocity, high-temperature jet impacting the surface and generating meltglass, microspherules, and multi-GPa shock metamorphism. The modeled results match the evidence observed at Tall el-Hammam.Collectively, the geological, geochemical, geophysical, and archaeological evidence converges on a super-Tunguska-scale airburst as the most likely mechanism for the city&apos;s destruction. Although such events are rare (estimated global recurrence interval of 200 to 1000 years), their capacity to devastate entire urban areas highlights the need for modern recognition and mitigation of the hazards posed by high-energy cosmic airbursts.

Název v anglickém jazyce

A Tunguska Sized Airburst Destroyed Tall el-Hammam a Middle Bronze Age City in the Jordan Valley Near the Dead Sea (Expanded)

Popis výsledku anglicky

We present evidence that Tall el-Hammam, a fortified Middle Bronze Age city in the Jordan Valley, was destroyed by an extraordinary high-energy event in approximately 1650 BCE. Excavations reveal that more than 12 m of a palace complex and a massive mudbrick rampart were leveled, and widespread fatalities occurred, with all skeletal remains displaying significant disarticulation. The entire city is capped by a ~1.5 m-thick charcoal-and-ash-rich destruction layer containing shock-metamorphic and high-temperature materials. This stratum yields abundant shocked quartz, vesicular melted pottery and mudbrick, diamond-like carbon, soot, Fe- and Si-rich microspherules, and CaCO3 spherules derived from melted plaster. SEM/TEM imaging with EDS and electron backscatter diffraction (EBSD) identified planar deformation features and high-pressure mineral phases diagnostic of shock metamorphism. Metallic micro-droplets of platinum, iridium, nickel, gold, silver, zircon, chromite, and quartz imply transient exposure to temperatures exceeding 2000°C.Scattered debris fields (potsherds, charred grain, charcoal, and bone fragments) exhibit a coherent southwest-to-northeast dispersal pattern consistent with a directed supersonic shock wave. Anomalously high salt concentrations (~4 wt%) in the destruction layer provide evidence for the vaporization of Dead Sea brines or sedimentary salts, producing hypersaline soils that appear to have inhibited agriculture. This environmental breakdown coincides with an enigmatic ~300-600-year regional abandonment of Tall el-Hammam and surrounding settlements in the lower Jordan River Valley. Some researchers suggest that an oral tradition of this catastrophe may have been preserved in the biblical narrative of the destruction of Sodom.The observed suite of shock, melt, and geochemical signatures cannot be explained by natural disasters, fires, earthquakes, lightning, anthropogenic activity, or warfare. We therefore propose a cosmic airburst by a comet or asteroid of &quot;super-Tunguska&quot; magnitude - several times larger than the 1908 Tunguska event. To test this hypothesis, we conducted hydrocode simulations of a Type-II &quot;touchdown&quot; airburst (an airburst whose fireball reaches Earth&apos;s surface), reproducing a high-velocity, high-temperature jet impacting the surface and generating meltglass, microspherules, and multi-GPa shock metamorphism. The modeled results match the evidence observed at Tall el-Hammam.Collectively, the geological, geochemical, geophysical, and archaeological evidence converges on a super-Tunguska-scale airburst as the most likely mechanism for the city&apos;s destruction. Although such events are rare (estimated global recurrence interval of 200 to 1000 years), their capacity to devastate entire urban areas highlights the need for modern recognition and mitigation of the hazards posed by high-energy cosmic airbursts.

Druh

J_ost - Ostatní články v recenzovaných periodicích

CEP obor

—

OECD FORD obor

10505 - Geology

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Airbursts and Cratering Impacts

ISSN

2941-9085

e-ISSN

2941-9085

Svazek periodika

3

Číslo periodika v rámci svazku

2025

Stát vydavatele periodika

DE - Spolková republika Německo

Počet stran výsledku

87

Strana od-do

1-87

Kód UT WoS článku

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EID výsledku v databázi Scopus

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