Mount St. Helens Ash from the 18 May 1980 Eruption: Chemical, Physical, Mineralogical, and Biological Properties

@article{Fruchter1980MountSH,
  title={Mount St. Helens Ash from the 18 May 1980 Eruption: Chemical, Physical, Mineralogical, and Biological Properties},
  author={Jonathan S. Fruchter and Diane E. Robertson and J. Catherine Evans and Khris B. Olsen and Elwood A. Lepel and Jagdish C Laul and Keith H. Abel and Roger W. Sanders and P. O. Jackson and N S Wogman and Richard W. Perkins and H H VAN Tuyl and Raymond H. Beauchamp and J. W. Shade and J. Leland Daniel and Raymond Leo Erikson and George A. Sehmel and R. N. Lee and Allan Robinson and Owen R. Moss and James K. Briant and William C. Cannon},
  journal={Science},
  year={1980},
  volume={209},
  pages={1116 - 1125}
}
Samples of ash from the 18 May 1980 eruption of Mount St. Helens were collected from several locations in eastern Washington and Montana. The ash was subjected to a variety of analyses to determine its chemical, physical, mineralogical, and biological characteristics. Chemically, the ash samples were of dacitic composition. Particle size data showed bimodal distributions and differed considerably with location. However, all samples contained comparable amounts of particles less than 3.5… 
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