Uścinowicz, G.
Impact craters and the extraterrestrial matter in their
surroundings: case of Morasko (Poland) and Kaali (Estonia)
Investigations have been carried out in the area of
meteorite impact craters within the Quaternary deposits in Morasko and the
Silurian bedrock in Kaali. Both surface destructions occurred during the fall
of cosmic bodies that induced formation of magnetic fine-grained material. The
presence of extraterrestrial spherules in Morasko and Kaali and their cosmic
origin state prove such a composition and character of the surface. Moreover,
the amount of magnetic fraction is increased in the sediments in the environs
of craters in relation to their surroundings. However, impact of similar
meteorites under similar environmental conditions can generate various
morphological, mineralogical and natural effects. Common features of the described
areas are the occurrence of collateral craters, their formation in sedimentary
rocks and presence of high amounts of extraterrestrial spherules in their
environs.