Analytical method: UNKNOWN
| Technique | UNKNOWN |
|---|---|
| Material | WHOLE ROCK |
| Mineral | none |
| Institution | Unknown, Unknown, USA |
| Reference | Rodriguez, Sergio Raul; Siebe, Claus; Komorowski, Jean Christophe; Abrams, Michael (2002) The Quetzalapa Pumice; a voluminous late Pleistocene rhyolite deposit in the eastern Trans-Mexican volcanic belt. Journal of Volcanology and Geothermal Research. 113; 1-2, Pages 177-212. 2002. |