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Jebel Wagf as Suwwan, Jordan: a possible impact crater – a first approach

[Jebel Wagf as Suwwan, Jordanien: ein möglicher Impaktkrater – eine erste Annäherung]

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In the eastern part of the barren Jordanian plateau that is built up of Upper Cretaceous and Tertiary chert-bearing carbonate rocks, a ring structure some 5.5 kilometres of maximum extension arises from a chertstrewn flat topography. This structure has hitherto been interpreted as of "cryptovolcanic" origin.

Recent field work revealed the presence of shatter cones, monomict and polymict fall-back and fall-out breccias, and indications on possibly partially melted chert and decarbonatized limestones as well. Two systems of planar elements have been found in one quartz grain.

Though the age of the structure is unknown, its excellent preservation hints on a Quaternary age.

German

Im östlichen Teil der jordanischen Wüste, die von oberkretazischen und tertiären Karbonatgesteinen und Chert-Einschaltungen aufgebaut wird, erhebt sich eine insgesamt 5,5 Kilometer große Ringstruktur aus dem von Cherts gepflasterten Plateau. Die Struktur wurde bisher als ,,kryptovulkanische" Bildung interpretiert.

Kürzlich durchgeführte Geländearbeiten ergaben das Vorhandensein von Strahlenkalken, monomikten und polymikten Auswurfbreccien sowie Hinweise auf möglicherweise angeschmolzene Cherts und dekarbonatisierte Kalksteine. Zwei Systeme planarer Elemente wurden bisher in einem Quarzkorn gefunden.

Obwohl das Alter der Struktur unbekannt ist, spricht ihre ausgezeichnete Erhaltung für ein quartäres Alter.
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Keywords: IMPACT BRECCIAS; IMPACT-GEOLOGY; JORDAN; MELTING PROCESSES; RING STRUCTURE; SHATTER CONES; SHOCK WAVE METAMORPHISM

Document Type: Short Communication

Publication date: 01 September 2006

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  • Zeitschrift der Deutschen Gesellschaft für Geowissenschaften (ZDGG) is an international peer reviewed journal that accepts papers on research and applied topics in the Earth Sciences. It is published online and in print. One volume, consisting of four issues is published annually. The journal is continously published by the German Geological Society since its foundation in 1848. It was relaunched in 2005.

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