A ground-penetrating radar study of the Vaidasoo bog (Estonia): no crater structure exists

Abstract

Ground-pen e trat ing ra dar (GPR) was used to ana lyse the cir cu lar Vaidasoo bog in north ern Es to nia. This was done to better un der stand its struc ture and or i gin, and to test the sug ges tion that Vaidasoo rep re sents a me te or ite im pact struc ture. The com bi na tion of GPR with LIDAR data sug gests that Vaidasoo bog is de vel oped in a NW-SE ori ented gla cial tun nel val ley where post-gla cial hy drol ogy is af fected by glaciofluvial de pos its. As no clear im pact-mod i fied bed rock fea tures were iden tified and the cir cu lar bog does not mir ror the to pog ra phy of the bed rock, we con clude that the Vaidasoo struc ture does not rep re sent a me te or ite im pact struc ture.

GIS‐based multiproxy coastline reconstruction of the eastern Gulf of Riga, Baltic Sea, during the Stone Age

“…Topographical information was derived from the LiDAR data and correction for topography was applied at every 5 or 10 m along the GPR profiles. For different sediments, different relative dielectric permittivities were used: five for dry sand (Davis & Annan 1989), 25 for water-saturated sand (Davis & Annan 1989;Fisher et al 2007), 70 for peat (Lowry et al 2009;Plado et al 2011;Mustasaar et al 2013) and 40 for clay-rich gyttja (Davis & Annan 1989).…”