Morasko - Impact Crater

Alternate Names
Local Language
Coordinates 52° 29' 25" N; 16° 53' 48" E
Notes
  1. 8 crater-like depressions are located near the village of Morasko, 9 km N of Poznan in the valley of Warta.
Country Poland
Region Poznan
Date Confirmed 1964
Notes
  1. Iron meteorites were recovered/found in 1910\'s, but an impact origin was not suggested as linked to the craters until 1964 (Pokrzywnicki, 1964 - in Polish; Also see Korpikiewicz, 1978, which has a short English summary). See Włodarski et al., 2017 and references therein for a good summary of past research (in English) and some more recent geochemical studies, although many of the earlier works are in Polish.
Buried? No
Notes
  1. Water fills the 4 largest craters (Korpikiewicz, 1978).
Drilled? No
Target Type Sedimentary
Notes
  1. In the soil of a beechwood-oak forest (Korpikiewicz, 1978).
Sub-Type Soil
Apparent Crater Diameter (km) 90 m
Age (Ma) ~0.005
Notes :
  1. The resetting time of meteorite fusion crusts were dated at about 5000 before present using thermoluminescence (Fedorowicz and Stankowski, 2016). Formed in glacial sediments about 5000 years ago, after the last glaciation (Bronikowska et al., 2017). Additional age constraints: The fall occurred later than 10,000 years ago, before the last glaciation (Korpikiewicz, 1978).

Method :
  1. Thermoluminescence
Impactor Type Iron, IAB
Notes
  1. Coarse octahedrite fragments (Classen, 1978). A total of 400 kg hasb een found to-date (Korpikiewicz, 1978). Meteorites recovered.

Advanced Data Fields

Notes

Erosion
2
  1. Only slight erosion results in the preservation of meteoritic material and crater-fill products (Korpikiewicz, 1978).
Final Rim Diameter
90 m
Maximum Crater Size
90 m
Number of Craters
7
Rim Reliability Index
1
  1. See Bronikowska et al 2018 reference - they list 7 craters in the field. Earlier reference, Korpikiewicz 1978 (below) says 8 craters in field. Largest crater is 100 m (No. 1) with the remaining diameters being 63 m (No. 3), 50 m (No. 7), 35 m (No. 4), 35 m (No. 8), 25 m (No. 2), 24 m (No. 6), and 15 m (No. 5) (Korpikiewicz, 1978).
Thickness of Seds
Target Age
Marine
No

References

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W Karaszewski (1974) Geological studies of "meteorite" craters in Noerdlingen Ries (West Germany) and at Morasko (Poland), Przeglad Geologiczny 22(12), p. 626-627, Wydawnictwa Geologiczne, Warsaw, url

J Classen (1978) The meteorite craters of Morasko in Poland, Meteoritics 13(2), p. 245-255, Arizona State University, Center for Meteorite Studies, Tempe, AZ, url

H Korpikiewicz (1978) Meteoritic shower Morasko, Meteoritics 13(3), p. 311-326, Arizona State University, Center for Meteorite Studies, Tempe, AZ, url

E P Gurova (1984) A group of young meteorite craters in the marginal northwestern part of the Aldan Anteclise, Doklady Akademii Nauk Ukrainskoi SSR, Seriya "B" 2, p. 9-12

W Czegka (1996) Remarks on the Morasko crater field and some of its lost morphological features, Meteoritics & Planetary Science 31, Suppl., Derek W G Sears (ed.), p. 34, Meteoritical Society, Fayetteville, AR, url

W T J Stankowski (2001) The geology and morphology of the natural reserve “Meteoryt Morasko”, Planetary and Space Science 49(7), p. 749-753, url, doi:https://doi.org/10.1016/S0032-0633(01)00011-3

W Luecke, A Muszynski, Z Berner (2006) Trace element partitioning in the Morasko Meteorite from Poznan, Poland, Chemie der Erde 66(4), p. 315-318, Elsevier for Gustav Fischer Verlag, Jena, url, doi:http://dx.doi.org/10.1016/j.chemer.2006.01.005

A S Pilski, J T Wasson, A Muszynski, R Kryza, L Karwowski, M Nowak (2013) Low-Ir IAB irons from Morasko and other locations in central Europe: One fall, possibly distinct from IAB-MG, Meteoritics & Planetary Science 48(12), p. 2531-2541, Meteoritical Society, Fayetteville, AR, url, doi:http://dx.doi.org/10.1111/maps.12225

W Luecke, A Kontny, U Kramar (2014) Geochemical zoning and magnetic mineralogy at Fe, Ni-alloy-troilite interfaces of three iron meteorites from Morasko, Coahuila II, and Mundrabilla, Meteoritics & Planetary Science 49(5), p. 750-771, Meteoritical Society, Fayetteville, AR, url, doi:http://dx.doi.org/10.1111/maps.12288

L Karwowski, J Kusz, A Muszynski, R Kryza, M Sitarz, E V Galuskin (2015) Moraskoite, Na(2)Mg(PO4)F, a new mineral from the Morasko IAB-MG iron meteorite (Poland), Mineralogical Magazine 79(2), p. 387-398, Mineralogical Society, London, url, doi:http://dx.doi.org/10.1180/minmag.2015.079.2.16

S Fedorowicz, W T J Stankowski (2016) Dating the Morasko meteorite fall by natural thermoluminescence of the fusion crust, Geologos 22(3), p. 251-258, De Gruyter Open Ltd, doi:10.1515/logos-2016-0024

W Włodarski, J Papis, W Szczuciński (2017) Morphology of the Morasko crater field (western Poland): Influences of pre-impact topography, meteoroid impact processes, and post-impact alterations, Geomorphology 295, p. 586-597, Elsevier B.V., doi:10.1016/j.geomorph.2017.08.025

M Bronikowska, N A Artemieva, K Wünnemann (2017) Reconstruction of the Morasko meteoroid impact—Insight from numerical modeling, Meteoritics & Planetary Science 52(8), p. 1704-1721, University of Arkansas, doi:10.1111/maps.12882

A Duczmal-Czernikiewicz, D Michalska (2018) Mineralogy and microstructure of the Morasko meteorite crust, Planetary and Space Science 164, p. 44-53, doi:10.1016/j.pss.2018.06.011

M Szokaluk, R Jagodziński, A Muszyński, W Szczuciński (2019) Geology of the Morasko craters, Poznań, Poland—Small impact craters in unconsolidated sediments, Meteoritics & Planetary Science 54(7), p. 1478-1494, University of Arkansas, doi:10.1111/maps.13290

M Kołodziej, Z Śniadecki, A Musiał, N Pierunek, Y Ivanisenko, A Muszyński, B Idzikowski (2020) Structural transformations and magnetic properties of plastically deformed FeNi-based alloys synthesized from meteoritic matter, Journal of Magnetism and Magnetic Materials 502, p. 166577, doi:10.1016/j.jmmm.2020.166577

W Szczuciński, A Muszyński (2020) Meteoryty, kratery uderzeniowe i inne ślady kosmicznej katastrofy w rejonie Moraska pod Poznaniem [Meteorites, impact craters, and other traces of a cosmic disaster at Morasko near Poznań], Przegląd Geologiczny 68(8), p. 637-644