Relief surface of a 3X3km area around the Hellroaring field sites in Yellowstone. Slide the animation bar at the bottom all of the way to the left to display a bedrock map, all of the way to the right for surficial geology, and toward the middle for an aerial photo (9/11/2013). Elevation range 530m. Bedrock symbols- Qs Detrital deposits, Tj Junction Butte Basalt, Tv Volcanic Rocks, WPCm Precambrian metamorphic. Surficial symbols- fa fine-grained humic alluvium, pg outwash and stream sandy gravel, pfd flood deposit, ptf, talus-flow deposit, pt till, pr rubble veneer, pks kame deposits sand, pkg kame gravel, R undivided older volcanic rocks of quaternary age. Bedrock map modified from Christiansen, USGS (1999). Surficial map modified from Pierce, USGS (1974). Aerial imagery from Esri. DEM from USGS.
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