A. K. Baksi, A. K. Hoffman, and M. Mcwilliams, Testing the accuracy ,o0f th,e geomagnetic poladty time-scale (GPTS) at 2-5 Ma
DOI : 10.1016/0012-821x(93)90164-5

. Ar, Ar incremental heating data on whole-rock basalts, Earth Planet. Sci. Lett, vol.118, pp.135-144, 1993.

J. Besse and V. Courtillot, Revised and synthetic apparent polar wander paths of the African, Eurasian, North American and Indian Plates, and true polar wander since 200 Ma, Journal of Geophysical Research: Solid Earth, vol.22, issue.B3, pp.4029-4050, 1991.
DOI : 10.1016/0040-1951(86)90193-9

F. H. Brown, R. T. Shuey, and M. K. Croes, Magnetostratigraphy of the Shungura and Usno Formations, southwestern Ethiopia: new data and comprehensive reanalysis, Geophysical Journal International, vol.54, issue.3, pp.519-538
DOI : 10.1111/j.1365-246X.1978.tb05492.x

S. C. Cande and D. V. Kent, Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous and Cenozoic, Journal of Geophysical Research: Solid Earth, vol.364, issue.B4
DOI : 10.1038/364788a0

P. L. Mcfadden and M. W. Mcelhinny, Permo-Triassic magnetostratigraphy in China: northern Tarim, Earth and Planetary Science Letters, vol.87, issue.1-2, pp.152-160, 1988.
DOI : 10.1016/0012-821X(88)90071-4

P. L. Mcfadden and M. W. Mcelhinny, Classification of the reversal test in palaeomagnetism, Geophysical Journal International, vol.103, issue.3, pp.725-729, 1990.
DOI : 10.1111/j.1365-246X.1990.tb05683.x

P. L. Mcfadden, R. T. Merrill, and M. W. Mcelhinny, Dipole/quadrupole family modeling of paleosecular variation, Journal of Geophysical Research, vol.18, issue.B10, pp.583-594, 1988.
DOI : 10.1029/JB093iB10p11589

P. L. Mcfadden, R. T. Merrill, M. W. Mcelhinny, and S. Lee, Reversals of the Earth's magnetic field and temporal variations of the dynamo families, Journal of Geophysical Research: Solid Earth, vol.49, issue.B3, pp.3923-3933, 1991.
DOI : 10.1080/03091928908243466

M. Pr6vot and S. Gromm6, Intensity of magnetization of subaerial and sub-madne basalts and its possible change with time, Geophys, J. R

X. Quidelleur and V. Courtillot, On low-degree spherical harmonic models of paleosecular variation, Physics of the Earth and Planetary Interiors, vol.95, issue.1-2, pp.55-77, 1996.
DOI : 10.1016/0031-9201(95)03115-4

X. Quidelleur, J. Valet, V. Courtillot, G. Hulot, L. Vandamme et al., A new method to determine paleosecular variations, geometry of the geomagnetic field for the last five million years: An Phys, Earth. Planet. Inter, vol.85, pp.131-142, 1994.

R. H. Steiger, E. J. Varet, J. , and F. Gasse, Subcommission on geochronology: Convention on the use of decay constants in geo- and cosmochronology, Earth and Planetary Science Letters, vol.36, issue.3, pp.359-362, 1977.
DOI : 10.1016/0012-821X(77)90060-7

P. Tapponnier, R. Armijo, I. Manighetti, and V. Courtillot, Bookshelf faulting and horizontal block rotations between overlapping rifts in southern Afar, Geophysical Research Letters, vol.274, issue.1, pp.1-4, 1990.
DOI : 10.1029/GL006i011p00817

J. R. Taylor, An introduction of error analysis, Univ. Sci. Books, vol.270, 1982.

J. Valet and L. Meynadier, Geomagnetic field intensity and reversals during the past four million years, Nature, vol.366, issue.6452, pp.234-238, 1993.
DOI : 10.1038/366234a0

. Meynadier, Remagnetization in lava flows recording pretransitional directions, J. Geophys. Res, vol.103, pp.9755-9775, 1998.

. Hongre, Paleointensity variations across the last geomagnetic reversal, 1998.

L. Palma, Canary Islands, Spain, J. Geophys. Res., in press, 1999.