Analytical method: UNKNOWN
| Technique | UNKNOWN |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Institution | Unknown, Unknown, USA |
| Reference | Ferrari, Luca; Garduno, Victor Hugo; Innocenti, Fabrizio; Manetti, Piero; Pasquare, Giorgio; Vaggelli, Gloria (1994) A widespread mafic volcanic unit at the base of the Mexican volcanic belt between Guadalajara and Queretaro. Geofisica Internacional. 33; 1, Pages 107-123. 1994. |