Very high-temperature impact melt products as evidence for cosmic airbursts and impacts 12,900 years ago
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11310%2F12%3A10133015" target="_blank" >RIV/00216208:11310/12:10133015 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/67985831:_____/12:00378869
Výsledek na webu
<a href="http://dx.doi.org/10.1073/pnas.1204453109" target="_blank" >http://dx.doi.org/10.1073/pnas.1204453109</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1073/pnas.1204453109" target="_blank" >10.1073/pnas.1204453109</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Very high-temperature impact melt products as evidence for cosmic airbursts and impacts 12,900 years ago
Popis výsledku v původním jazyce
It has been proposed that fragments of an asteroid or comet impacted Earth, deposited silica-and iron-rich microspherules and other proxies across several continents, and triggered the Younger Dryas cooling episode 12,900 years ago. Although many independent groups have confirmed the impact evidence, the hypothesis remains controversial because some groups have failed to do so. We examined sediment sequences from 18 dated Younger Dryas boundary (YDB) sites across three continents (North America, Europe,and Asia), spanning 12,000 km around nearly one-third of the planet. All sites display abundant microspherules in the YDB with none or few above and below. In addition, three sites (Abu Hureyra, Syria; Melrose, Pennsylvania; and Blackville, South Carolina) display vesicular, high-temperature, siliceous scoria-like objects, or SLOs, that match the spherules geochemically. We compared YDB objects with melt products from a known cosmic impact (Meteor Crater, Arizona) and from the 1945 Trin
Název v anglickém jazyce
Very high-temperature impact melt products as evidence for cosmic airbursts and impacts 12,900 years ago
Popis výsledku anglicky
It has been proposed that fragments of an asteroid or comet impacted Earth, deposited silica-and iron-rich microspherules and other proxies across several continents, and triggered the Younger Dryas cooling episode 12,900 years ago. Although many independent groups have confirmed the impact evidence, the hypothesis remains controversial because some groups have failed to do so. We examined sediment sequences from 18 dated Younger Dryas boundary (YDB) sites across three continents (North America, Europe,and Asia), spanning 12,000 km around nearly one-third of the planet. All sites display abundant microspherules in the YDB with none or few above and below. In addition, three sites (Abu Hureyra, Syria; Melrose, Pennsylvania; and Blackville, South Carolina) display vesicular, high-temperature, siliceous scoria-like objects, or SLOs, that match the spherules geochemically. We compared YDB objects with melt products from a known cosmic impact (Meteor Crater, Arizona) and from the 1945 Trin
Klasifikace
Druh
J<sub>x</sub> - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)
CEP obor
DC - Seismologie, vulkanologie a struktura Země
OECD FORD obor
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Návaznosti výsledku
Projekt
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Návaznosti
I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Ostatní
Rok uplatnění
2012
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Proceedings of the National Academy of Sciences of the United States of America
ISSN
0027-8424
e-ISSN
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Svazek periodika
109
Číslo periodika v rámci svazku
28
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
10
Strana od-do
"E1903"-"E1912"
Kód UT WoS článku
000306642100005
EID výsledku v databázi Scopus
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