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| Title | Backpack sampler next to high temperature vents with white volcanic deposits visible/present |
| Photographer | Zolller, William |
| Publisher | University of Washington. Dept. of Chemistry |
| Date of photograph | 1981 |
| Site location | Inside of crater |
| Notes | Slide shows sampling backpack near one of the high temperature vents. The white deposits are very clearly visible. They come from the condensation of the volatile metallic components that are coming out of these vents and then condensing when they hit the cooler air. The yellow deposits that are also visible in this picture are indeed sulfur that has been deposited on the rock. Now the compounds that are white are normally metallic carbonates or metallic sulfates, which are white by nature. Some are soluble and some are not. Different volatile metals will form them. Even metals that are not considered volatile at regular room temperature are volatile at volcanic temperatures. Elements such as calcium, strontium, and barium, which are common rock forming minerals, at these temperatures are quite volatile. Sulfates and carbonates of metals will be formed upon condensation on the cooler rocks. |
| Subjects (keywords) | Analytical instrumentation
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| Subjects (LCSH) | Volcanic ash, tuff, etc. -- sampling
Volcanic gases
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| Subjects (Chem Abstracts) | Sampling apparatus
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| Coverage | United States -- Washington(State) -- Saint Helens, Mount |
| Digital Collection | Mt. St. Helens Post-Eruption Database |
| Slide ID Number | zolmsh78 |
| Contact Info | To inquire about permissions, contact Dr. Bill Zoller at:zoller@u.washington.edu |
| Copyright statement | William Zoller. Database is intended for educational and instructional use; if you cite or download images, please acknowledge appropriately. |
| Type | image |
