The Hayden Geological Survey of 1871 explored the region of northwestern Wyoming that later became Yellowstone National Park in 1872. It was led by geologist Ferdinand Vandeveer Hayden. The 1871 survey was not Hayden's first, but it was the first federally funded, geological survey to explore and further document features in the region soon to become Yellowstone National Park and played a prominent role in convincing the U.S. Congress to pass the legislation creating the park. In 1894, Nathaniel P. Langford, the first park superintendent and a member of the Washburn-Langford-Doane Expedition which explored the park in 1870, wrote this about the Hayden expedition:

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  • Die unter Hayden-Expedition bekannte Forschungsreise war Teil der Erforschung des Westens der USA unter der Leitung des Geologen Ferdinand Vandeveer Hayden. Sie führte 1871 in das Gebiet des heutigen Yellowstone-Nationalparkes und vertiefte das Wissen aus der Folsom-Expedition von 1869 und der Washburn-Langford-Doane-Expedition von 1870. An der Expedition beteiligten sich Fachleute verschiedener Disziplinen. Das Ziel war, Flora, Fauna und die geologische Gegebenheiten zu erforschen, diese auf Bildern und Fotos festzuhalten sowie möglichst gute Zugangsrouten zu identifizieren. Hayden stand für die Expedition ein Budget von 40.000 US-Dollar zur Verfügung. 1872 und 1878 führte Hayden weitere, weniger bekannte, Forschungsreisen in das Yellowstone-Gebiet durch. Bereits 1859 hatte er eine Expedition in das Yellowstone-Gebiet geleitet, hatte sie aber nach kurzer Zeit wegen starken Schneefalles erfolglos abbrechen müssen. (de)
  • The Hayden Geological Survey of 1871 explored the region of northwestern Wyoming that later became Yellowstone National Park in 1872. It was led by geologist Ferdinand Vandeveer Hayden. The 1871 survey was not Hayden's first, but it was the first federally funded, geological survey to explore and further document features in the region soon to become Yellowstone National Park and played a prominent role in convincing the U.S. Congress to pass the legislation creating the park. In 1894, Nathaniel P. Langford, the first park superintendent and a member of the Washburn-Langford-Doane Expedition which explored the park in 1870, wrote this about the Hayden expedition: We trace the creation of the park from the Folsom-Cook expedition of 1869 to the Washburn expedition of 1870, and thence to the Hayden expedition (U. S. Geological Survey) of 1871, Not to one of these expeditions more than to another do we owe the legislation which set apart this "pleasuring-ground for the benefit and enjoyment of the people"— Nathaniel P. Langford (en)
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  • Die unter Hayden-Expedition bekannte Forschungsreise war Teil der Erforschung des Westens der USA unter der Leitung des Geologen Ferdinand Vandeveer Hayden. Sie führte 1871 in das Gebiet des heutigen Yellowstone-Nationalparkes und vertiefte das Wissen aus der Folsom-Expedition von 1869 und der Washburn-Langford-Doane-Expedition von 1870. An der Expedition beteiligten sich Fachleute verschiedener Disziplinen. Das Ziel war, Flora, Fauna und die geologische Gegebenheiten zu erforschen, diese auf Bildern und Fotos festzuhalten sowie möglichst gute Zugangsrouten zu identifizieren. Hayden stand für die Expedition ein Budget von 40.000 US-Dollar zur Verfügung. 1872 und 1878 führte Hayden weitere, weniger bekannte, Forschungsreisen in das Yellowstone-Gebiet durch. Bereits 1859 hatte er eine Expedi (de)
  • The Hayden Geological Survey of 1871 explored the region of northwestern Wyoming that later became Yellowstone National Park in 1872. It was led by geologist Ferdinand Vandeveer Hayden. The 1871 survey was not Hayden's first, but it was the first federally funded, geological survey to explore and further document features in the region soon to become Yellowstone National Park and played a prominent role in convincing the U.S. Congress to pass the legislation creating the park. In 1894, Nathaniel P. Langford, the first park superintendent and a member of the Washburn-Langford-Doane Expedition which explored the park in 1870, wrote this about the Hayden expedition: (en)
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  • Hayden-Expedition (de)
  • Hayden Geological Survey of 1871 (en)
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