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  2. Cave survey - Wikipedia

    en.wikipedia.org/wiki/Cave_survey

    A cave survey is a map of all or part of a cave system, which may be produced to meet differing standards of accuracy depending on the cave conditions and equipment available underground. Cave surveying and cartography , i.e. the creation of an accurate, detailed map, is one of the most common technical activities undertaken within a cave and ...

  3. Ammassalik wooden maps - Wikipedia

    en.wikipedia.org/wiki/Ammassalik_wooden_maps

    Ammassalik wooden maps are carved, tactile maps of the Greenlandic coastlines. In the 1880s, Gustav Holm led an expedition to the Ammassalik coast of eastern Greenland , where he met several Tunumiit , or Eastern Greenland Inuit communities, who had had no prior direct contact with Europeans.

  4. List of caves in the United States - Wikipedia

    en.wikipedia.org/wiki/List_of_caves_in_the...

    Bat Cave; Carter Caves State Park; Cascade Caverns; Colossal Cavern; Diamond Caverns; Eleven Jones Cave; Fisher Ridge Cave System; Glover's Cave; Goochland Cave

  5. Illinois Caverns State Natural Area - Wikipedia

    en.wikipedia.org/wiki/Illinois_Caverns_State...

    Illinois Caverns is a state natural area in the New Design Precinct of Monroe County, Illinois.It features Illinois Caverns which is alternatively known as Mammoth Cave of Illinois (also Burksville Cave, Egyptian Cave, Eckert Cave).

  6. Central U.S. hardwood forests - Wikipedia

    en.wikipedia.org/wiki/Central_U.S._hardwood_forests

    The pre-Columbian dominant ecosystems in this region were oak savannas with woodlands and forests of oak and hickory.Today only small areas of oak and hickory woodland remain, mixed with dogwoods, sassafras trees and hop hornbeams.

  7. Mark Twain Cave - Wikipedia

    en.wikipedia.org/wiki/Mark_Twain_Cave

    Geologically Mark Twain Cave and its nearby neighbor Cameron Cave differ from most of the 6,500+ caves found in Missouri. Both are believed to be remnants of a much larger cave system cut apart by a glacier and millions of years of erosion, leading to speculation by geologists and common citizens alike that there may be further undiscovered caves in the Hannibal region.

  8. Fisher Ridge Cave System - Wikipedia

    en.wikipedia.org/wiki/Fisher_Ridge_Cave_System

    The Fisher Ridge Cave System is a cave system located in Hart County, Kentucky, United States, near Mammoth Cave National Park.As of November 2019 it had been mapped to a length of 130.001 miles (209.216 km), making it the fifth-longest cave in the United States and the tenth-longest in the world.

  9. Laurel Caverns - Wikipedia

    en.wikipedia.org/wiki/Laurel_Caverns

    Laurel Caverns is the largest cave in the Commonwealth of Pennsylvania by volume and area. [3] Located in the community of Farmington, it sits on the Chestnut Ridge near Uniontown, [4] roughly 50 miles (80 km) southeast of Pittsburgh.