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PROJETO RADAM

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Fig. 2<br />

MME/DNPM - <strong>PROJETO</strong> <strong>RADAM</strong><br />

DÀÎAÇOES GEOCRONOLÔGICAS DE BASALTOS DA BACIA DO PIAUf-MARANHÄO<br />

AG<br />

AG<br />

AG<br />

AN<br />

AN<br />

AN<br />

AN<br />

AV<br />

CN<br />

CN<br />

CN<br />

CN<br />

CN<br />

CN<br />

IZst-1-MA<br />

IZst-1-MA<br />

NLst-1-PI<br />

RB-1-MA<br />

TB-1-MA<br />

TB-1-MA<br />

TB-1-MA<br />

VG-1R-MA<br />

Identificacäo<br />

da<br />

Amostra<br />

07 ;CN-338<br />

80<br />

12/99<br />

14<br />

252<br />

260<br />

262<br />

278<br />

15<br />

305<br />

334<br />

342<br />

343<br />

347<br />

479<br />

Obs: - AG - 14 = AN - 260 (mesmo afloramento)<br />

Método Potàssio Argônio (K/Ar)<br />

Sao Paulo<br />

175 m.a.<br />

110 m.a.<br />

115 m.a.<br />

117 m.a.<br />

189 m.a.<br />

134 m.a.<br />

116 m.a.<br />

174 m.a.<br />

118 m.a.<br />

Alterado<br />

154 m.a.<br />

Alterado<br />

Alterado<br />

Alterado<br />

209 m.a.<br />

Alterado<br />

I/29<br />

U.S.A.<br />

147 m.a.<br />

168 m.a.<br />

160 m.a.<br />

136 m.a.<br />

199 m.a.<br />

176 m.a.<br />

196 m.a.<br />

198 m.a.<br />

260 m.a.<br />

201 m.a.<br />

Local izacäo da Amostra<br />

Canto do Buriti<br />

Simph'cio Mendes<br />

Picos<br />

Elesbäo Veloso<br />

Picos<br />

Gaturiano<br />

Agricolândia<br />

Conceicäo do Canindé<br />

Esperantina<br />

Itaueira<br />

Isaias Coelho<br />

Povoado Ruivo (entre Itainópolis<br />

e Geturiano)<br />

A 54 km de Oeiras p/Floriano<br />

Floriano (sai'da de Floriano<br />

para Canto do Buriti)<br />

Testemunho Profundid. (M)<br />

4 87<br />

6 192<br />

9 2.140<br />

56 1.816<br />

20 1.005<br />

21 1.040<br />

28 1.367<br />

32;38 2.175

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