In the Footsteps of Warren B. Hamilton: New Ideas in Earth Science
This unusual book, published to honor the late iconoclast and geologist extraordinaire Warren Bell Hamilton, comprises a diverse, cross-disciplinary collection of bold new ideas in Earth and planetary science. Some chapters audaciously point out all-too-obvious deficits in prevailing theories. Other ideas are embryonic and in need of testing and still others are downright outrageous. Some are doubtless right and others likely wrong. See if you can tell which is which. See if your students can tell which is which. This unique book is a rich resource for researchers at all levels looking for interesting, unusual, and off-beat ideas to investigate or set as student projects.
Parent crater for Australasian tektites beneath the sands of the Alashan Desert, Northwest China: Best candidate ever?
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Published:May 03, 2022
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CiteCitation
Jiří Mizera, Zdeněk Řanda, Václav Suchý, Vladimír Strunga, Jaroslav Klokočník, Jan Kostelecký, Aleš Bezděk, Zdeněk Moravec, 2022. "Parent crater for Australasian tektites beneath the sands of the Alashan Desert, Northwest China: Best candidate ever?", In the Footsteps of Warren B. Hamilton: New Ideas in Earth Science, Gillian R. Foulger, Lawrence C. Hamilton, Donna M. Jurdy, Carol A. Stein, Keith A. Howard, Seth Stein
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ABSTRACT
Australasian tektites represent the largest group of tektites on Earth, and their strewn field covers up to one sixth of Earth’s surface. After several decades of fruitless quest for a parent crater for Australasian tektites, mostly in the main part of the strewn field in Indochina, the crater remains undiscovered. We elaborate upon a recently suggested original hypothesis for the impact in the Alashan Desert in Northwest China. Evidence from geochemical and isotopic compositions of potential source materials, gravity data, and geographic, paleoenvironmental, and ballistic considerations support a possible impact site in the Badain Jaran part of the Alashan Desert. In further support of an impact location in China, glassy microspherules recovered from Chinese loess may be the right age to relate to the Australasian tektite event, perhaps as part of the impacting body. The most serious shortcomings of the commonly accepted Indochina impact location include signs of little chemical weathering of source materials of Australasian tektites, unlike highly weathered sedimentary targets in Indochina, and questionable assumptions about transport of distal ejecta.
- alkaline earth metals
- Asia
- Be-10
- beryllium
- Cenozoic
- China
- Far East
- geomorphology
- gravity anomalies
- impact craters
- impact features
- isotopes
- landform evolution
- metals
- middle Pleistocene
- O-18
- oxygen
- paleoenvironment
- Pleistocene
- Quaternary
- radioactive isotopes
- spherules
- spherulites
- stable isotopes
- strewn fields
- tektites
- Tengger Desert
- Badain Jaran Desert