GEOROC Sample Information
Location
Latitude -1.73 | Longitude -78.68
ANDEAN ARC / NORTHERN ANDEAN VOLCANIC ZONE / ECUADOR / SICALPA FORMATION
7 KM SSW OF RIOBAMBA
CONVERGENT MARGIN
Reference
LAVENU A.,BONHOMME M. G.,NOBLET C.,EGÜEZ A.,DUGAS F.,VIVIER G.
NEW K-AR AGE DATES OF NEOGENE AND QUATERNARY VOLCANIC ROCKS FROM THE ECUADORIAN ANDES: IMPLICATIONS FOR THE RELATIONSHIP BETWEEN SEDIMENTATION, VOLCANISM, AND TECTONICS
J. S. AMER. EARTH SCI. 5 [1992] 309-320
Sample Name: FD87106B
Sample Information
TUFF / ACIDIC TUFF
OUTCROP
Sample Age Information
No sample age information given.
Chemistry (and, if given, analytical ages)
Analyzed: WHOLE ROCK
| AGE | 2.65 ± 0.21 MA |
| K2O | 1.86 WT% |
| AR40 | 0.000000159 CCMSTP/G |
Analyzed: MINERAL / COMPONENT (INCL. GROUNDMASS) PLAGIOCLASE
| AGE | 4.76 ± 0.57 MA |
| K2O | 0.39 WT% |
| AR40 | 0.00000006 CCMSTP/G |