The Fernando de Noronha archipelago lies in the Atlantic Equatorial Ocean at 3 050'S latitude and 32 026'W longitude. It comprises a big volcaníc complex consisting of unweathered volcanic rocks of Tertíary age. Three geological formations can be separated: Quixaba, Remédios, and São José. Using a compass and a clinometer, 100 samplee were collected in the fonnations in a total of 15 sites. However, with the results obtained in the laboratory, it was impossible to make use of a11 studied sites because tive out of the 15 sítes presented weak magnetíc intensity relative to the employed magnetometer preventíng the cleaning process of the secondary magnetlzations of these sites. Therefore, the 10 studied sítes presented a magnetízation with D = 350°, 1=-9°, a95 = 6,8°, and k = 51,2. lhe cleaning process employed was the magnetic alternatefield. Just one site prevented reversed polarization. The paleomagnetic pole was computed as 81°N and 232°E (A95 = 5°), which agrees with the results for peles having the same age in the South America. Recebido em 12 de dezembrode 1986 Revisão aceita em 22 de maio de 1987 o que a Ciênciapode fazer pelo homem não é suficiente. Isto deve se subordinar ao que a Ciência pode fazer para o homem.
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