ISSN:
1365-246X
Quelle:
Blackwell Publishing Journal Backfiles 1879-2005
Thema:
Geologie und Paläontologie
Notizen:
The Dingle Group, a continental Upper Silurian redbed succession in SW Ireland, has yielded a multicomponent palaeomagnetic record. The oldest magnetization retrieved, the B component, with in situ mean direction of D/I= 191/+9; K= 40; α95= 3.6°; N= 41, post-dates the local late Silurian-mid-Devonian (Acadian) tectonic deformation and is in very good agreement with the prevailing remanences in other Caledonian rocks of western Ireland. An overprinted ‘A’ component with in situ mean direction D/I= 194/-16; K= 53; α95= 3.1°; N= 41, is about as prevalent as the B component and was probably acquired in late Palaeozoic (Kiaman) times. By comparison with other published data, including a positive fold test for corresponding magnetization of Upper Silurian redbeds in Clare Island, it is concluded that the flat-lying B field (relative to Britain and Ireland) was in existence at least from the late Silurian to late Middle Carboniferous, i.e. covering a minimum time span of 100 M. yr.
Materialart:
Digitale Medien
URL:
http://dx.doi.org/10.1111/j.1365-246X.1993.tb06997.x
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