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

NOT GIVEN / ACIDIC TUFF
OUTCROP

Sample Age Information

No sample age information given.

Chemistry (and, if given, analytical ages)

Analyzed: WHOLE ROCK

AGE2.65 ± 0.21 MA
K2O1.86 WT%
AR400.000000159 CCMSTP/G

Analyzed: MINERAL / COMPONENT (INCL. GROUNDMASS) PLAGIOCLASE

AGE4.76 ± 0.57 MA
K2O0.39 WT%
AR400.00000006 CCMSTP/G