Lake Abita

Lake Abita
Location West Cook, Cook County, Minnesota, U.S.
Coordinates 47°55′23″N 90°27′21″W / 47.9231°N 90.4557°W / 47.9231; -90.4557Coordinates: 47°55′23″N 90°27′21″W / 47.9231°N 90.4557°W / 47.9231; -90.4557
Basin countries United States
Surface area 102 acres (0.41 km2)
Max. depth 14 feet
Surface elevation 2,040.19 ft (622 m)

Abita Lake is a lake in West Cook, Minnesota, which, at an elevation of 2,040.19 feet (621.85 m) above sea level, is Minnesota's ninth highest named lake.[1] Prior to modern surveys, the lake was once believed to be Minnesota's highest elevation lake.[2]

Name

Abita is Ojibwe for "half."[3]

Topography

Lake Abita is situated in the northern region of the Duluth Complex, in the Misquah Hills.[4] The Duluth gabbro of this region forms several ridges running east to west, which are punctuated by outcroppings of so-called "red rock," several of which being the highest points of land in Minnesota.[5] Lake Abita sits on the southern face of one of these, Brule Mountain.[6] Brule Mountain rises 506 feet (154 m) on its northern approach, and the highland to its south, where Lake Abita sits, is only 30 feet (9.1 m) below its summit, which gives the lake the distinction of being Minnesota's highest.[7] It sits about 1,450 feet (440 m) above Lake Superior, which at 602 feet (183 m), is Minnesota's lowest point,[8] and is only about 12 miles (19 km) away from it.[9]

Lake Abita is part of the Brule River watershed. Its water enters the Brule's south branch between Lake Brule and junction with the north branch.[2] It is located just within the border of the Boundary Waters Canoe Area, which can only be legally entered by water through certain points. The nearest canoe entry point is located on the Bower Trout Lake.[10] The south shore can be reached by foot on a trail from Mit Lake Road.[11]

Ecology

Lake Abita is a shallow lake, with a maximum depth of 14 feet (4.3 m). This makes the lake suitable for smaller fish. In a 1990 survey, the overwhelming majority of fish caught in survey nets were white suckers, an average of 58.3 per net.[11] An average of one yellow perch was caught per net, but surveys failed to find any presence of the walleye population which state fisheries had been trying to establish in the lake through three years of fry stocking. The state DNR thus concluded that lake Abita has minimal sport fishing value.[11] Lake Abita's water clarity was measured at seven feet with a secchi disk reading.[11]

Geology

Late 19th century geological surveys of Minnesota found that the rock surrounding Lake Abita was predominately red and grey feldspar, specifically plagioclase, partially changed to diallage, magnetite, and hornblende.[12] This survey found the color changed to brown as one moved south from the lake, due to the presence of Limonite.[13] Eozoon quartz, apatite, and pyrite were also noted in the vicinity of the lake.[12]

References

  1. ↑ http://www.mngeo.state.mn.us/chouse/metadata/lidar_arrowhead2011.html#Metadata_Reference_Information.
  2. 1 2 Warren Upham (1920). Minnesota Geographic Names: Their Origin and Historic Significance. Minnesota Historical Society. p. 145.
  3. ↑ BWCA Glossary. Retrieved July 24, 2010.
  4. ↑ Hall, Christopher Webber. Geography and Geology of Minnesota, Vol. 1, p. 7. The H. W. Wilson Company, Minneapolis, 1903.
  5. ↑ Ver Steeg, Karl. The Influence of Geologic Structure on the Drainage Pattern in Northeastern Minnesota. p. 355. The Journal of Geology, Vol. 55, No. 4 (Jul., 1947), pp. 353-361. The University of Chicago Press.
  6. ↑ Winchell, Newton Horace. The Geology of Minnesota, Vol. I of the Final Report. Plate LXXXIII, The Rove Lake Plate. 1872-1901
  7. ↑ Winchell, N. H. Annual Report, for the Year 1881. Geological and Natural History Survey of Minnesota. p. 74. St. Paul, 1882.
  8. ↑ The Geography of Minnesota. Retrieved July 27, 2010.
  9. ↑ Cook County Minnesota, General County Map. Retrieved July 27, 2010.
  10. ↑ Public Water Access, Cook County West. Retrieved July 27, 2010.
  11. 1 2 3 4 Lake Information Report. Minnesota Department of Natural Resources. Retrieved July 27, 2010.
  12. 1 2 Winchell, N. H. The History of Geological Surveys in Minnesota. p. 78. Pioneer Press, St. Paul, 1880.
  13. ↑ Winchell, N. H. The History of Geological Surveys in Minnesota. p. 76. Pioneer Press, St. Paul, 1880.
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