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ht_vogel: Firehole River (IMG_0228T)
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ht_vogel: steam twister (IMG_0229T)
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ht_vogel: bacterial mats/hot springs runoff into river (IMG_0958H)
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ht_vogel: runoff from hot springs into Firehole River (IMG_0959H)
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ht_vogel: bacterial mats/runoff from Excelsior Geyser (IMG_0230T)
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ht_vogel: bacterial mats beside Excelsior Geyser (IMG_0961H)
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ht_vogel: Excelsior Geyser (IMG_0962H)
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ht_vogel: Excelsior Geyser crater (IMG_0964H)
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ht_vogel: Excelsior Geyser crater (IMG_0965H)
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ht_vogel: Excelsior Geyser crater (IMG_0235T)
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ht_vogel: Excelsior Geyser (IMG_0236T)
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ht_vogel: Excelsior Geyser (IMG_0237T)
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ht_vogel: Excelsior Geyser (IMG_0239T)
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ht_vogel: Turquoise Pool (IMG_0233T)