Abstract The age of the beginning magnetic polarity Chron M0r, a proposed marker for base Aptian Stage, is disputed due to divergence published radioisotopic dates and ambiguities in stratigraphic correlation sections. Our magnetostratigraphy core DH1 from Svalbard, Norway, calibrates bentonite bed, dated by U-Pb methods 123.1 ± 0.3 Ma, uppermost part magnetozone M1r, which ∼1.9 m.y. before M0r...

Abstract Cockroaches (Blattaria s. str.) were documented from numerous amber localities around the world, representing both extinct and extant families. Alienopteridae is an cockroach family known only Cretaceous of Gondwana (Brazil, Botswana, Myanmar amber) Cenozoic North America. Alienopterix santonicus sp. n. Late Ajka Coal Formation (Bakony Mts, western Hungary) extends rich geographical di...