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| Archeologist Mark Parsons exposes a fiber layer in an undisturbed area of Fate Bell Shelter. The distinctly colored and textured layers visible in the excavation wall represent different episodes in the shelter's long history of intermittent human occupation. Generally speaking, the dark layers are associated with intense occupation, while the light colored layers are mostly cave dust and roof spalls from periods when the shelter (or just this part of it) wasn't used by humans. Photo from ANRA-NPS Archives at TARL. |