Analytical method: UNKNOWN
| Technique | UNKNOWN |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Institution | Unknown, Unknown, USA |
| Reference | Luhr, James F; Carmichael, Ian S E (1990) Petrological monitoring of cyclical eruptive activity at Volcan Colima, Mexico. Journal of Volcanology and Geothermal Research. 42; 3, Pages 235-260. 1990. |