Rajlich's hypothesis

from Wikipedia, the free encyclopedia

The hypothesis of Rajlich is a physical hypothesis with the meaning of Geology. According to the hypothesis, macroscopic and white lamellae in quartz and other minerals from the Bohemian massif and other parts of the world represent the wave fronts that are generated by a meteorite impact . The hypothetical wave fronts consist of many microcavities. Its origin is attributed to ultrasonic cavitation , which is very well known from technical practice.

The cavities are usually formed in liquids, not solids. The meteorite impact should cause the minerals to fluidize and the waves of high frequencies should tear them open.

It is known from technical practice that an implosion of a cavity which collapses in the liquid is associated with a local increase in temperature by a few thousand Kelvin and the shock wave. In quartz from many localities in the Bohemian Massif one can find many systems of white lamellas that overlap. It can be assumed that the structure of quartz was partially broken in the course of the fluidization, thanks to several passes of the waves and the high number of implosions in the cavities. While composing its structure, the predominant composition of the print should be respected. In the areas of high pressure, the formation of quartz with the higher density could then be preferred, that is, the formation of the small molecular Si-O chains. In the low pressure areas the situation could be reversed. Finding a harmonic signature in the density of quartz is believed to be a way of verifying the hypothesis.

The author of the hypothesis is the Czech geologist Petr Rajlich . The hypothesis is related to the Czech Crater hypothesis .

Individual evidence

  1. ^ Rajlich, Petr, 1944-: Český kráter . Jihočeské muzeum, 2007, ISBN 978-80-86260-80-8 .
  2. ^ Rajlich, Petr, 1944- .: Vesmírná příhoda v Českém křemeni (av Českém masivu) . Geology, 2014, ISBN 978-80-260-5678-2 .
  3. ↑ Kenneth S. Suslick: The Chemical Effects of Ultrasound . In: Scientific American . tape 260 , no. 2 , p. 80-86 , doi : 10.1038 / scientificamerican0289-80 ( nature.com ).
  4. ^ J. Mestan, EI Alvarez Polanco: Density Variations in Quartz As a Key for Deciphering Impact-Related Ultrasonic Sounding (Rajlich's Hypothesis)? In: AGU Fall Meeting Abstracts . tape 11 , December 1, 2014, bibcode : 2014AGUFMMR11A4310M .