Landforms
<DIV STYLE="text-align:Left;"><DIV><P><SPAN>This study aims to introduce readers to the diversity and      complexity of Yellowstone's surface features.  Within applied      geomorphology, a landform is defined as "any physical,      recognizable form or feature of the Earth's surface having a      characteristic shape, and produced by natural causes; it includes      major forms such as a plain, plateau, or mountain, and minor forms      such as a hill, valley, slope, esker, or dune. Taken together,      landforms make up the surface configuration of the Earth.". The      surface configuration of Yellowstone National Park (YNP) is a      complex continuum of slopes and surficial materials. To make sense      of this complexity, we classify groups of slopes and materials into      a set of relatively homogeneous classes. Note that this scheme      reduces the continuous landscape picture to a set of classes (albeit      a large number of them) within each of which surface features are      relatively similar. These classes are termed "landforms."      The objective of this study was to characterize the nature and      distribution of "meso" level landforms and associated      features for the entire park (2,196,480 acres (889,574 ha)).      "Meso" level landforms are on the order of 2.5 to 250      acres (10,000 to 1,000,000 m2), and include valleys, moraine, hills,      and scarps. "Micro" level landforms of 0.0025 to 2.5 acres      (10 to 10,000 m2) include features such as footslopes, kettles,      small terrace scarps. We judged these too detailed for the kinds of      landscape level work needed in the park. We selected a mapping scale      of 1:62,500 to give the best combination of readability, publication      practicality, and appropriate use of available data. We      characterized landforms in terms of both visible and inferred      characteristics. These characteristics include: genetic origin, kind      and degree of stream drainage dissection, slope gradient      distribution, slope curvature (profile and plan), relief, proportion      and shape of bedrock exposure, and the nature of included surficial      materials. These terms are described in Differentiation of Landforms      (Shovic, H. F. 1996. Landforms and Associated Surficial Materials of      Yellowstone National Park. Yellowstone National Park, Center for      Resources, Mammoth, WY). Their definitions follow concepts used in      geomorphology, as modified by mapping specialists. Results include      an ARC/INFO coverage, with 6,214 polygons, and about 800 different      map units, each a combination of landform, matrix composition, and      presence of wet areas.</SPAN></P><P><SPAN>Data were downloaded in December, 2020 by the Wyoming State Geological Survey (WSGS) for display on the interactive Geology of Yellowstone Map. The WSGS has not formally reviewed or quality-controlled these data; users are encouraged to consult the original data source.</SPAN></P></DIV></DIV>
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