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Madison Boulder

{{Use mdy dates|date=August 2023}}

{{Infobox park

| name = Madison Boulder Natural Area

| photo = Boulder, Madison, NH.jpg

| photo_width = 280

| photo_alt =

| photo_caption = The Madison Boulder as photographed in 1922

| map = New Hampshire

| map_caption = Location in New Hampshire

| relief = 1

| label = Madison Boulder

| location = Madison, New Hampshire, United States

| coords = {{coord|43.93146|-71.1678|format=dms|type:landmark_scale:10000_region:US|display=inline,title}}

| coords_ref =

| area = {{convert|17|acre}}

| elevation = {{convert|512|ft}}{{cite gnis|873089|Madison Boulder State Geologic Site}}

| established = 1946

| designation = National Natural Landmark

| administrator = New Hampshire Division of Parks and Recreation

| status =

| website = [https://www.nhstateparks.org/visit/state-parks/madison-boulder-natural-area Madison 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 {{convert|17|acre|adj=on}} Madison Boulder Natural Area in Madison, New Hampshire. The boulder is a huge granite rock measuring {{convert|83|ft}} in length, {{convert|23|ft}} in height above the ground, and {{convert|37|ft}} in width. It weighs upwards of {{convert|5000|ST|kg}}. A part of the block is buried, probably to a depth of {{convert|10|to|12|ft|m}}. It was acquired by the state from the Kennett family in 1946. In 1970, Madison Boulder was designated as a National Natural Landmark by the National Park Service.

See also

References

{{portal|New Hampshire}}

{{reflist|refs=

{{cite web |url=https://www.nhstateparks.org/visit/state-parks/madison-boulder-natural-area |title=Madison Boulder Natural Area |publisher=New Hampshire Division of Parks and Recreation |accessdate=September 19, 2020}}

{{cite web |url=https://www.nh.gov/nhdfl/documents/statemap-sept-2007.pdf |title=State Lands |publisher=New Hampshire Department of Resources and Economic Development |date=July 2007 |accessdate=September 19, 2020}}

{{cite web |url=https://www.nhstateparks.org/getmedia/911e45b9-6002-4d72-b805-ca444ce53059/NH-State-Parks_Historic-Context-Study_1945-1975.pdf#page=24 |title=New Hampshire State Parks: Mid-Century Modern (1945-1975): Historic Context Study |author=Lisa Mausolf, Preservation Consultant |publisher=New Hampshire Division of Parks and Recreation |page=24 |date=March 2019 |accessdate=September 19, 2020}}

{{cite web |url=https://www.nps.gov/subjects/nnlandmarks/site.htm?Site=MABO-NH |title=Madison Boulder |series=National Natural Landmarks |publisher=National Park Service |quote=It illustrates the power of an ice sheet to move large blocks of fractured bedrock over substantial distances.

|accessdate=September 19, 2020}}

}}

External links

  • [https://www.nhstateparks.org/visit/state-parks/madison-boulder-natural-area Madison Boulder Natural Area] New Hampshire Department of Natural and Cultural Resources

{{Protected areas of New Hampshire}}

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Category:Glacial erratics of the United States

Category:Landforms of Carroll County, New Hampshire

Category:Rock formations of New Hampshire

Category:National Natural Landmarks in New Hampshire

Category:State parks of New Hampshire

Category:Parks in Carroll County, New Hampshire

Category:Protected areas established in 1946

Category:1946 establishments in New Hampshire

{{NewHampshire-geologic-formation-stub}}