Implications of palaeomagnetic data from the Tortworth Silurian inlier (southern Britain) to palaeogeography and Variscan tectonism
- Torsvik, Trond H.
- Trench, Allan
- Mckerrow, W. S.
DOIAbstract
Palaeomagnetic data are presented from early Silurian (Upper Llandovery) lavas from the Tortworth Silurian inlier of south-west England. Two magnetization components are recognized on the basis of contrasting demagnetization characteristics. A lower unblocking-temperature component (<350°C) is oriented parallel to the Earth's present magnetic field at the sampling site ( N = 46, declination = 352°, inclination = 69°, k = 52.1, Α 95 = 2.9°). A higher unblocking-temperature component (350–600°C) is inferred to be primary on the basis of a stratigraphy-parallel reversal pattern (combined tilt-corrected mean: N = 42, declination = 056°, inclination = -30°, k = 22.6, Α 95 = 4.7°). Geological implications of these new data are as follows. (1) the...
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