U.S. Geological Exploration of the Fortieth Parallel

Target entity: U.S. Geological Exploration of the Fortieth Parallel
Context triple: [Grove Karl Gilbert, employer, U.S. Geological Exploration of the Fortieth Parallel]

• A. Raynolds Expedition to the Yellowstone and Missouri River headwaters
  The Raynolds Expedition to the Yellowstone and Missouri River headwaters was an 1859–1860 U.S. Army topographical survey that produced some of the earliest detailed scientific and geographic information about the northern Rocky Mountains and the Yellowstone region.
• B. Second Geological Survey of Pennsylvania
  The Second Geological Survey of Pennsylvania was a comprehensive 19th-century state-sponsored scientific effort that systematically mapped and analyzed Pennsylvania’s geology, mineral resources, and topography, greatly advancing geological knowledge and resource development in the region.
• C. French Geodesic Mission to Lapland
  The French Geodesic Mission to Lapland was an 18th-century scientific expedition that measured a meridian arc near the Arctic Circle to test the Earth's shape and confirm Newton's theory of an oblate spheroid.
• D. The Elements of Geology
  The Elements of Geology is a foundational 19th-century textbook by Charles Lyell that helped establish modern geological science and popularize uniformitarian principles.
• E. Westward the Course of Empire Takes Its Way
  Westward the Course of Empire Takes Its Way is a large 19th-century mural by Emanuel Leutze that romantically depicts American westward expansion and Manifest Destiny.
• F. None of above. chosen
• G. Unsure - the case is ambiguous/there is not enough information to decide.

Target entity: U.S. Geological Exploration of the Fortieth Parallel
Target entity description: The U.S. Geological Exploration of the Fortieth Parallel was a major 19th-century American scientific survey that mapped and studied the geology and natural resources along the 40th parallel in the western United States.

• A. Raynolds Expedition to the Yellowstone and Missouri River headwaters
  The Raynolds Expedition to the Yellowstone and Missouri River headwaters was an 1859–1860 U.S. Army topographical survey that produced some of the earliest detailed scientific and geographic information about the northern Rocky Mountains and the Yellowstone region.
• B. Second Geological Survey of Pennsylvania
  The Second Geological Survey of Pennsylvania was a comprehensive 19th-century state-sponsored scientific effort that systematically mapped and analyzed Pennsylvania’s geology, mineral resources, and topography, greatly advancing geological knowledge and resource development in the region.
• C. French Geodesic Mission to Lapland
  The French Geodesic Mission to Lapland was an 18th-century scientific expedition that measured a meridian arc near the Arctic Circle to test the Earth's shape and confirm Newton's theory of an oblate spheroid.
• D. The Elements of Geology
  The Elements of Geology is a foundational 19th-century textbook by Charles Lyell that helped establish modern geological science and popularize uniformitarian principles.
• E. Westward the Course of Empire Takes Its Way
  Westward the Course of Empire Takes Its Way is a large 19th-century mural by Emanuel Leutze that romantically depicts American westward expansion and Manifest Destiny.
• F. None of above. chosen