K-Ar dating of a basaltic layer in the sedimentary Lavras Basin, northeastern Brazil
1978; Sociedade Brasileira de Geologia; Volume: 8; Issue: 4 Linguagem: Inglês
10.5327/rbg.v8i4.147
ISSN2317-4889
AutoresH.N.A. Priem, N.A.I.M. Boelrijk, E.H. Bom, E.H. Hebeda, E. A. Th. Verdurmen, R.H. Verschure,
Tópico(s)Geological formations and processes
ResumoThe Lavras basin near Lavras da Mangabeira (Ceara, NE. Brazil) is a relatively small tectonic basin filled with non-metam-orphic sediments resting on the Precambrian/Cambrian crystalline basement. K-Ar dating of six samples from an intercalated basaltic layer yields an age of 175 ± 4 Ma, settins an age about the Early/Middle Jurassic boundary to the sedimentation.
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