Grafton Notch State Park

Grafton Notch State Park
Maine State Park
Screw Augur Falls
Country United States
State Maine
County Oxford
Township Grafton
Elevation 1,601 ft (488 m) [1]
Coordinates 44°35′36″N 70°56′52″W / 44.59333°N 70.94778°W / 44.59333; -70.94778Coordinates: 44°35′36″N 70°56′52″W / 44.59333°N 70.94778°W / 44.59333; -70.94778 [1]
Area 3,129 acres (1,266 ha) [2]
Established 1963
Management Maine Department of Agriculture, Conservation and Forestry
Location in Maine
Website: Grafton Notch State Park

Grafton Notch State Park is a public recreation area in Grafton Township, Oxford County, Maine.[3] The state park occupies 3,129 acres (1,266 ha) surrounding Grafton Notch, the mountain pass between Old Speck Mountain and Baldpate Mountain.[4] The park is abutted by the eastern and western sections of the Mahoosuc Public Reserved Land, which total 31,807 acres (12,872 ha).[2] The park is managed by the Department of Agriculture, Conservation and Forestry.

History

In 1963, the state made its first acquisitions of the land for the park with the purchase of 2,875 acres (1,163 ha) from Brown Company. The addition of 18 more parcels, many less than 5 acres, took place in the 1960s, mostly in 1964. The park boundaries were fixed with the addition on two one-acre parcels in 1977.[5]

Geology

Grafton Notch reflects the glaciation processes carved by the Laurentide Ice sheet during the Wisconsin Glaciation episode. Notable geomorphology of the park includes U-shaped valleys, gorges, and esker [6]. Erosional processes expose the unique bedrock composed of Devonian granite with pegmatite intrusions [6]. Poorly sorted diamicton and stratified gravel pits indicate glacial and glacio-fluvial depositional processes at work. Additionally, these processes scattered erratics over the u-shaped valley floor [6].

Noteworthy gorges in Grafton Notch include Screw Auger Falls, Mother Walker Falls and Moose Cave. Screw Auger Falls is located within a steep gorge along the Bear River; when water levels are low enough, erratics are visible in the stream [6]. Steep cliff faces and flat valley floor seen from Mother Walker Falls are characteristic of glacial erosion. However, responsibility for gorge formation is debated; “they may have formed while the ice sheet retreated north of the region and contributed a large quantity of meltwater, or more likely, they formed while the ice sheet covered the area and the subglacial water was under very high pressure” [6]. Whether a particular landform was created by local glacier or continental ice sheet is also still debated. Many pegmatite vein intrusions are visible around the water eroded bedrock of the gorges. 

Activities and amenities

The park's mountain scenery includes the Screw Auger and Mother Walker waterfalls and Moose Cave.[7] Recreational opportunities include fishing, hunting, and picnicking. Hiking trails include a rugged 12-mile (19 km) stretch of the Appalachian Trail.[3]

References

  1. 1 2 "Grafton Notch". Geographic Names Information System. United States Geological Survey.
  2. 1 2 "State Parks, State Historic Sites and Public Reserved Lands" (PDF). Department of Agriculture, Conservation and Forestry. September 2016. Retrieved July 26, 2017.
  3. 1 2 "Grafton Notch State Park". Department of Agriculture, Conservation and Forestry. Retrieved June 15, 2015.
  4. ↑ "Grafton Township". Maine: An Encyclopedia. Publius Research. Retrieved June 15, 2015.
  5. ↑ "Western Mountains Region Management Plan" (PDF). Maine Department of Conservation: Bureau of Parks and Lands. January 4, 2011. p. 23. Retrieved July 26, 2017.
  6. 1 2 3 4 5 Doughty, A.M., Thompson, W.B., Grafton Notch State Park: Glacial Gorges and Streams under Pressure in the Mahoosic Range, Maine.
  7. ↑ Thompson, Woodrow B. (November 2001). "Glacial and Postglacial Geology of Grafton Notch State Park". Maine Geologic Facts and Localities. Maine Geological Survey. Retrieved July 26, 2017.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.