Archivo: Bulletin of the Geological Society of America (1922) (20262300128)

Descripción: Title: Bulletin of the Geological Society of America Identifier: bulletinofgeolo331922geol (find matches) Year: 1890 (1890s) Authors: Geological Society of America Subjects: Geology Publisher: (New York : The Society) Contributing Library: Smithsonian Libraries Digitizing Sponsor: Biodiversity Heritage Library View Book Page: Book Viewer About This Book: Catalog Entry View All Images: All Images From Book Click here to view book online to see this illustration in context in a browseable online version of this book. Text Appearing Before Image: SURFACE FUSION OF LAVA 143 by spreading, the crater was filled and overflowed, Liberating the most remark- able blasts of hot gas, which were shot down the slope as at Martinique, com- pletely devastating its path. That the extruded lava was softened by heat and rendered viscous is shown Text Appearing After Image: Figure 1.—Basaltic Lava from, San Salvador, Central America This basaltic lava was erupted by the Crater El Pinar of San Salvador volcano June 7, 1017, in the republic of San Salvador, Central America. Dr. S. Calderon sent the specimens to Washington, and states that they were "col- lected in pockets of scoria? formed by the escape of the gases, being found on all very steep slopes where the current of lava formed cascades." It is believed that the hot gases escaping from the lava-flow into the pockets met the gases of the air and reacted so as to become hot enough to melt the adjacent lava. The upper portion of the specimen is dull red. It is a part of the lava-flow the lower portion of which has been melted by the hot gases in a pocket. by the fact that the steam-torn lava was bent during the eruption. Portions of the bent lava were broken, but the continuity of the mass indicates that most of the lava at the time of its eruption was softened by heat to a highly viscous condition. Note About Images Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original work.
Título: Bulletin of the Geological Society of America (1922) (20262300128)
Créditos: https://www.flickr.com/photos/internetarchivebookimages/20262300128/ Source book page: https://archive.org/stream/bulletinofgeolo331922geol/#page/n178/mode/1up
Autor(a): Internet Archive Book Images
Permiso: At the time of upload, the image license was automatically confirmed using the Flickr API. For more information see Flickr API detail.
Términos de Uso: No known copyright restrictions
Licencia: No restrictions
Enlace de Licencia: https://www.flickr.com/commons/usage/
¿Se exige la atribución?: No