Browsing by Author "Stankowski, Wojciech T.J."
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Item Dating the Morasko meteorite fall by natural thermoluminescence of the fusion crust(Instytut Geologii UAM, 2016-12) Fedorowicz, Stanisław; Stankowski, Wojciech T.J.The date of fall of the Morasko iron meteorite was determined by means of thermoluminescence measurements of the fusion crust and related local materials. Three small pieces, commonly referred to as ‘shrapnel’, were used. The results obtained are 4.5–5.0 ka, which is in good agreement with previous estimates of 4–6 ka on the basis of radiometric, do- simetric and palynological methods.Item The crust structure of the Morasko meteorite – a preliminary hypothesis(Instytut Geologii UAM, 2017-05) Stankowski, Wojciech T.J.A small piece of the Morasko meteorite, weighing 970 g, yields traces of its journey through the Earth’s atmosphere and of its impact into a mineral substrate, such as reflected in the meteorite’s crust. This is seen in the crust structure in the form of sintered as well as fusion and semi-fusion layers for which ablative niches are optimum sites. Subsequent weathering processes have resulted in significant mineralogical changes in the crusts. The meteorite crusts originated during polygenetic processes.