Preferences help
enabled [disable] Abstract
Number of results
2017 | 8 | 149-168
Article title

Kratery Morasko w świetle wiedzy na temat ukośnych impaktów

Title variants
Morasko craters base on knowledge related to oblique impacts
Languages of publication
It is considered that The Morasko meteorite shower happened about 5400 years BP with a trajectory from NE to SW (Bronikowska et al. 2015). Recent studies not only prove that this fall could be observed in Februrary 14, 1271, but also that location of most findings in the area to the east side of the craters, should not be taken as the main indicator of impact direction. The proper answer can be given base on knowledge related to oblique impacts, supported by understanding of complicated fragmentation process. The largest crater in Morasko Meteorite Restricted Area has main ejecta plume located in SE, side walls in SW and NE, and free of ejecta Zone of Avoidance (ZoA) in NW. This clearly shows that impact trajectory was approximatelly from NW to SE. There were also discovered other structures, 2 km North from Restricted Area, having common features. Their ejecta plumes as well as few raised ducts (possible traces of underground penetration) are directed to SE, pointing the largest structure – Umultowskie Lake, located approx. 2 km ESE from known main Morasko crater. Shapes of cavities, their walls and ejecta asymmetry allow estimating trajectories and defining new Morasko strewnfield, which matches not only location of impact strucures and discovered meteorite fragments, but also explains smaller (3–4 kg) findings in the neighborhood of Oborniki Wielkopolskie.

Physical description
  • Baszko G., 1822, Kronika Lechitów i Polaków, Armoryka, Warszawa 2016.
  • Bronikowska M., Artemieva N.A., Wünnemann K., Szczucinski W., 2015, Determining the initial parameters of the morasko meteoroid, Bridging the Gap III: Impact Cratering In Nature, Experiments, and Modeling, 2015 University of Freiburg, Germany. LPI Contribution No. 1861, s. 1049.
  • Cassidy W.A., Lenard M.L., 1996, Discovering research value in the Campo del Cielo, Argentina, meteorite craters, Meteoritics & Planetary Science 31, s. 433–448.
  • Gault D.E., Wedekind J.A., 1978, Experimental studies of oblique impact, Lunar and Planetary Science Conference, 9th, s. 3843–3875.
  • Herrick R.R., Hessen K.K., 2006, The planforms of low-angle impact craters in the northern hemisphere of Mars, Meteoritics & Planetary Science, 41(10), s. 1483–1495.
  • Herrick R.R., Yamamoto S., Barnouin-Jha O. S., Sugita S., Matsui, T., 2008, Constraints from laboratory experiments on crater excavation and formation of an uprange forbidden zone in an oblique impact, Lunar and Planetary Science 39#2305.
  • Kürbis B., 2010, Kronika Wielkopolska, Universitas, Kraków 2010.
  • McDonald M.A., Melosh H.J., Gulick S.P.S., 2008, Oblique impacts and peak ring position: Venus and Chicxulub, Geophysical Research Letters, vol. 35, L07203.
  • Muszyński A., Kryza R., Karwowski Ł., Pilski A.S., Muszyńska J., 2012, Morasko. Największy deszcz meteorytów żelaznych w Europie środkowej, Poznań 2012.
  • Pilski A.S., Karwowski Ł., Kryza R., Muszyński A., 2012, Badania chemiczne deszczu meteorytów żelaznych Jankowo Dolne-Morasko-Przełazy, ASMP, vol. 3, s. 157–158.
  • Poelchau M.H., 2010, The subsurface structure of oblique impact craters, Berlin.
  • Pokrzywnicki J., 1955, O meteorytach naszych ziem zachodnich, Urania nr 6, 1955, s. 165–172.
  • Pokrzywnicki J., 1964, I. Meteoryty Polski. II. Katalog meteorytów w zbiorach polskich, Studia Geologica Polonica, vol. XV, Wydawnictwa Geologiczne, s. 70–71, Warszawa 1964.
  • Ptak M., 2013, Zmiany powierzchni i batymetrii wybranych jezior pojezierza pomorskiego, Prace Geograficzne, Instytut Geografii i Gospodarki Przestrzennej Uniwersytetu Jagiellońskiego, 2013, z. 133, s. 61–76.
  • Schultz P.H., Ernst C., A’Hearn M.F., Eberhardy C., Sunshine J.M., i zespół Deep Impact, 2006, The Deep Impact collision: a large-scale oblique impact experiment, Lunar and Planetary Science 37#2294.
  • Schultz P.H., Eberhardy C.A., Ernst C.M., A’Hearn M.F., Sunshine J.M., Lisse C.M., i in., 2007, The Deep Impact oblique impact cratering experiment, Icarus 190, s. 295–333.
  • Stankowski W., 2009, Meteoryt Morasko. Osobliwość obszaru Poznania, Wydawnictwo Naukowe UAM, Poznań 2009.
  • Stankowski W., 2012, Upadek meteorytu Przełazy w świetle danych geomorfologicznych i geologicznych, ASMP vol. 3, s. 104–111.
  • Szokaluk M., Jagodziński R., Muszyński A., Szczuciński W., 2015, Ejecta blanket from the Morasko meteorite impact – first results, Bridging the Gap III: Impact Cratering In Nature, Experiments, and Modeling, 2015 University of Freiburg, Germany. LPI Contribution No. 1861, s. 1100.
  • Vesconi M.A.,Wright S.P., Spagnuolo M., Jacob R., Cerrutti C., Garcia L., Fernandez E., Cassidy W.A., 2011, Meteoritics & Planetary Science 46, Nr 7, s 935–949.
  • Walesiak T., 2016, Analiza cech impaktu ukośnego na przykładzie struktur Porządzie, Jaszczułty i Ochudno, ASMP vol. 7, s. 151–176.
Document Type
Publication order reference
YADDA identifier
JavaScript is turned off in your web browser. Turn it on to take full advantage of this site, then refresh the page.