Madison Boulder

43°55′53″N 71°10′04″W / 43.93146°N 71.1678°W / 43.93146; -71.1678^[1]Area17 acres (6.9 ha)^[2]Elevation512 feet (156 m)^[1]Established1946^[3]Administered byNew Hampshire Division of Parks and RecreationDesignationNational Natural LandmarkWebsiteMadison Boulder Natural Area

The Madison Boulder is one of the largest known glacial erratics in North America and among the largest in the world; it is preserved in the 17-acre (6.9 ha) Madison Boulder Natural Area in Madison, New Hampshire.^[4] The boulder is a huge granite rock measuring 83 feet (25 m) in length, 23 feet (7.0 m) in height above the ground, and 37 feet (11 m) in width. It weighs upwards of 5,000 short tons (4,500,000 kg). A part of the block is buried, probably to a depth of 10 to 12 feet (3.0 to 3.7 m).^[4] It was acquired by the state from the Kennett family in 1946.^[3] In 1970, Madison Boulder was designated as a National Natural Landmark by the National Park Service.^[5]

References

^ ^a ^b "Madison Boulder State Geologic Site". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
^ "State Lands" (PDF). New Hampshire Department of Resources and Economic Development. July 2007. Retrieved September 19, 2020.
^ ^a ^b Lisa Mausolf, Preservation Consultant (March 2019). "New Hampshire State Parks: Mid-Century Modern (1945-1975): Historic Context Study" (PDF). New Hampshire Division of Parks and Recreation. p. 24. Retrieved September 19, 2020.
^ ^a ^b "Madison Boulder Natural Area". New Hampshire Division of Parks and Recreation. Retrieved September 19, 2020.
^ "Madison Boulder". National Natural Landmarks. National Park Service. Retrieved September 19, 2020. It illustrates the power of an ice sheet to move large blocks of fractured bedrock over substantial distances.

External links

Madison Boulder Natural Area New Hampshire Department of Natural and Cultural Resources

Protected areas of New Hampshire

Federal

National Historic Parks and Sites	Saint-Gaudens NHP
National Forests	White Mountain
National Trails	Appalachian Trail
National wild and scenic rivers	Lamprey River Nashua River Wildcat Brook
National Wildlife Refuges	Great Bay John Hay Silvio O. Conte Umbagog Wapack
Other protected areas	Great Bay National Estuarine Research Reserve

State

State parks	Ahern Androscoggin Annett Bear Brook Beaver Brook Falls Bedell Bridge Cardigan Chesterfield Gorge Clough Coleman Crawford Notch Daniel Webster Birthplace Deer Mountain Campground Dixville Notch Echo Lake Eisenhower Memorial Ellacoya Endicott Rock Forest Lake Fort Constitution Fort Stark Franconia Notch Franklin Pierce Homestead Gardner Memorial Wayside Governor Wentworth Historic Site Greenfield Hampton Beach Hannah Duston Memorial Jenness Jericho Mountain Kingston Lake Francis Lake Tarleton Madison Boulder Milan Hill Miller Mollidgewock Monadnock Moose Brook Mt. Sunapee Mt. Washington Nansen Ski Jump North Hampton Northwood Meadows Odiorne Point Pawtuckaway Pillsbury Pisgah Rhododendron Robert Frost Rollins Rye Harbor Sculptured Rocks Silver Lake Taylor Mill Umbagog Lake Wadleigh Wallis Sands Weeks Wellington Wentworth Wentworth–Coolidge Mansion White Island White Lake Winslow
State forests	Abbott Agnew Allen Alton Bay Ames Ammonoosuc Annett Annie Duncan Ashenden Ayers Ballard Bear Mountain Belknap Mountain Benton Big Island Black Mountain Blair Blue Job Mountain Bowditch-Runnels Cape Horn Carroll Casalis Chemung Cilley Connecticut Lakes Connecticut River Contoocook Conway Common Lands Cowden Craney Hill Cushman Davisville Davis-White Devils Slide District #5 Dodge Brook Eaton Fall Mountain Fay Feuer Foster & Colburn Fox Gay George Duncan Gile Gilmore Goodwin-Chandler Grant Green Mountain Hamel Harriman-Chandler Haven Hemenway Hodgman Honey Brook Hubbard Hill Huston-Morgan Hyland Hill Kearsarge Mountain Lang Station Lead Mine Leighton Litchfield Little Pine River Livermore Falls Lord Pines Lovewell Mountain Low Marshall Mascoma Mast Yard Max Israel Meadow Pond Merrimack River Merriman Mt. Major Nash Stream Nottingham Nursery Opechee Bay Page Page's Corner Paugus Bay Percy Pine River Piscataquog Powwow River Prescott Province Road Ragged Mountain Reed's Ferry Rock Rimmon Russell Russell-Abbott Russell-Shea Saltmarsh Pond Sanborn Scribner-Fellows Second Presidential Sentinel Mountain Shadow Hill Shaker Shieling Sky Pond Soucook River Southeast Stevens Pines Strawberry Hill Sugar Hill Swain Taylor Totten Trails Upton-Morgan Urban Forestry Center Vienna Smith Vincent Wade Walker Welton Falls West Iron Works Road White Farm William Thomas Woodman
Wildlife management areas	Cornish