Y. Gallet et al., MAGNETOSTRATIGRAPHY OF THE HETTANGIAN LANGMOOS SECTION (ADNET, AUSTRIA) - EVIDENCE FOR TIME-DELAYED PHASES OF MAGNETIZATION, Geophysical journal international, 115(2), 1993, pp. 575-585
Study of the magnetostratigraphy of the earliest Jurassic (mainly Hett
angian) section of Langmoos near Adnet in Austria (Northern calcareous
Alps) provides a sequence of 10 magnetic polarity intervals. These in
tervals are often evident in the natural remanent magnetization. Howev
er, rather than a true magnetostratigraphic sequence, palaeomagnetic a
nalyses reveal evidence for successive phases of magnetization within
the section. Evidence includes (1) changes in lithology associated wit
h changes in magnetic polarity, (2) different combinations of componen
ts of both polarities, and (3) largely non-antipodal directions. Consi
dering the palaeomagnetic directions, we suggest that the apparent mag
netostratigraphy is the result of two or three phases of magnetization
which occurred at different stages of the tectonic emplacement of the
Northern Calcareous Alps.