Expeditions organized or participated in by the Smithsonian . S»r*-- J t Fig. 8.—Platform of thin-bedded sinter deposits beneath giant geyser cone,Grotto Geyser of Upper Geyser Basin. Photograph by Fig. 9.—Mouth of Great Fountain Geyser showing water at rest just beforea great eruption, as seen in Fig. 10. Photograph by Walcott. Alternatewetting and drying of area about the geyser results in deposition of salica inbeautiful forms all about its basin. SMITHSONIAN MISCELLANEOUS COLLECTIONS VOL. 66

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Keywords: ., bookcentury1900, bookdecade1910, booksubjectscienti, bookyear1912