Organic block coatings in block-and-ash flow deposits at Merapi Volcano, central Java

@article{Donoghue2008OrganicBC,
  title={Organic block coatings in block-and-ash flow deposits at Merapi Volcano, central Java},
  author={Eleanor Donoghue and Valentin R. Troll and Lothar M. Schwarzkopf and Geoff Clayton and Robbie Goodhue},
  journal={Geological Magazine},
  year={2008},
  volume={146},
  pages={113 - 120}
}
Abstract The 1954, 1994, 1998 and 2006 block-and-ash flow deposits from Merapi volcano, Indonesia, contain andesite blocks that display localized, dark surface coatings. These coated blocks are typically found in clusters, but may also occur isolated within the block-and-ash flow deposits. The coatings form irregular patches (tens of centimetres across) on block surfaces, and are characterized by a silver, metallic appearance. The origin and composition of the coatings have not previously been… Expand
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TLDR
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