Age, source, and regional stratigraphy of the Roraima Supergroup and Roraima-like outliers in northern South America based on U-Pb geochronology
New 207Pb/206Pb ion-microprobe dates from the basement underlying the Roraima Supergroup, from sandstones and tuffs within the supergroup, and from associated mafic intrusions establish new temporal framework for this major stratigraphic unit in northern South America. Zircons from the tuffs within...
| Main Authors: | , , , , , |
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| Format: | Journal Article |
| Published: |
Geological Society of America
2003
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| Online Access: | http://hdl.handle.net/20.500.11937/30872 |