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| First Page | Document Content | |
|---|---|---|
 Date: 2012-10-30 09:50:10Plate tectonics Volcanic rocks Tephra Volcanic ash Tungurahua Reventador Volcano Quito Phreatomagmatic eruption Geology Volcanology Stratovolcanoes |
| First Page | Document Content | |
|---|---|---|
Date: 2012-10-30 09:50:10Plate tectonics Volcanic rocks Tephra Volcanic ash Tungurahua Reventador Volcano Quito Phreatomagmatic eruption Geology Volcanology Stratovolcanoes |
