Minerais de ferro do Ordovícico Inferior do Anticlinal de Valongo
The Lower Ordovician oolitic ironstones of Valongo anticline have abundant chamosite and/or siderite. True oolites are rare in the studied levels. Some pseudo-oolites are related to the presence of algae, as evidenced by cathodoluminescence. Iron came from emerged areas and deposited during transgre...
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| Format: | article |
| Language: | por |
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2011
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| Online Access: | https://hdl.handle.net/10216/52536 |
| Country: | Portugal |
| Oai: | oai:repositorio-aberto.up.pt:10216/52536 |