Two Creeks Buried Forest State Natural Area

State Natural Area in Wisconsin
44°19′39″N 87°32′41″W / 44.32750°N 87.54472°W / 44.32750; -87.54472Area25 acres (10 ha)Elevation614 ft (187 m)[1]Established1967Governing bodyWisconsin Department of Natural Resources

Two Creeks Buried Forest State Natural Area is a site in the Wisconsin State Natural Areas Program and a unit of the Ice Age National Scientific Reserve. The site lies in the northeast corner of Manitowoc County on the shore of Lake Michigan north of Two Creeks, Wisconsin, USA. Periodically exposed in a steep lakeshore bluff is a stratum of sediment, known as the Two Creeks forest bed. It contains stumps, logs, branches, pine needles, pinecones, moss, and other forest litter and is sandwiched between layers of glacial till. This is an important site in Great Lakes geochronology because it firmly establishes the timeframe of advances and retreats during the last glacial period in this region.[2][3]

As summarized in Rech and others, various studies have dated the buried logs and stumps from the Two Creeks forest using radiocarbon dating and analyzed their growth rings to determine a minimum lifespan for the forest.[3] Initial research into the age of this buried forest indicated an calibrated age range of ~13,840–13,620 cal BP and a minimum lifespan for the forest of ~230 to 250 yr.[4][5] Later research by Leavitt and others indicated a minimum lifespan of 329 yr for the Two Creeks and an age range of 13,760–13,530 cal BP.[6]

The lower layer of glacial till was deposited during the end of the Woodfordian substage of the Wisconsin glaciation. The remains in the park demonstrate that a warmer interval, called the Twocreekan substage, followed in which the glacier retreated and a forest of spruce, pine, and hemlock grew. Then the climate cooled again and the Greatlakean substage began.[7] A glacial tongue blocked Lake Michigan's drainage, causing the water level to rise and flood the forest, carrying in sediments which buried the forest floor. The glacier proceeded to flow over the forest, flattening it and ultimately depositing another layer of glacial till over it.[8]

Two Creeks Buried Forest State Natural Area is open to visitation. There is an historical marker at the location.[9] The site has no trails or displays, but visitors can park in the northwest corner of the site and wander freely across the grounds. Collection of any material is prohibited.[10]

References

  1. ^ "Two Creeks Buried State Forest". Geographic Names Information System. United States Geological Survey. 1980-08-29. Retrieved 2011-03-18.
  2. ^ Black, R.F., 1974. Geology of the Ice Age National Scientific Reserve of Wisconsin. U.S. National Park Service Scientific Monograph Series, 2, 234 pp.
  3. ^ a b Rech, J.A., Nekola, J.C. and Pigati, J.S., 2012. Radiocarbon ages of terrestrial gastropods extend duration of ice-free conditions at the Two Creeks forest bed, Wisconsin, USA. Quaternary Research, 77(2), pp.289-292.
  4. ^ Broecker, W.S. and Farrand, W.R., 1963. Radiocarbon age of the Two Creeks forest bed, Wisconsin. Geological Society of America Bulletin, 74(6), pp.795-802.
  5. ^ Kaiser, K.F., 1994. Two Creeks Interstade dated through dendrochronology and AMS. Quaternary Research, 42(3), pp.288-298.
  6. ^ Leavitt, S.W., Panyushkina, I.P., Lange, T., Cheng, L., Schneider, A.F. and Hughes, J., 2007. Radiocarbon “wiggles” in great lakes wood at about 10,000 to 12,000 BP. Radiocarbon, 49(2), pp.855-864.
  7. ^ Evenson, E.B., Farrand, W.R., Eschman, D.F., Mickelson, D.M. and Maher, L.J., 1976. Greatlakean substage: a replacement for valderan substage in the lake Michigan basin. Quaternary Research, 6(3), pp.411-424.
  8. ^ Mickelson, D.M., Hooyer, T.S., Socha, B.J., Winguth, C., 2007. Late-glacial ice advances and vegetation changes in east-central Wisconsin. In: Hooyer, T.S. (Ed.), Late-Glacial History of East-Central Wisconsin, Wisconsin Geological and Natural History Survey Open-File Report, 2007-01. pp. 72–87.
  9. ^ "An Ancient Forest Bed". Wisconsin Historical Markers. 2013-08-31. Archived from the original on 3 April 2014. Retrieved 2013-09-06.
  10. ^ Meyer, T., ed. Wisconsin, Naturally: A Guide to 150 Great State Natural Areas. Madison, Wisconsin, Wisconsin Department of Natural Resources, Bureau of Endangered Resources, State Natural Areas Program, 184 pp.

External links

  • Two Creeks Buried Forest State Natural Area
  • Two Creeks Buried Forest geology from the National Park Service
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  • Kinnickinnic River Potton
  • Kinnickinnic River Headwaters
  • Kinnickinnic River South Fork
  • Kissick Swamp
  • Knapp Creek
  • Koshkonong
  • Lake Mills
  • Lake Noquebay
  • Lake Pepin
  • Lakes Coulee
  • Lambs Creek
  • Lawrence Creek
  • Leola Marsh
  • Liberty Creek
  • Lightning Creek
  • Lima Marsh
  • Little Rice
  • Lodi Marsh
  • Loon Lake
  • Lundy Pond
  • Lyons
  • Mack
  • Maine
  • Manion
  • Mashek Creek
  • McAdams
  • McKenzie Creek
  • McMillan Marsh
  • Mead
  • Meadow Valley
  • Morgan Marsh
  • Mount Hope
  • Mud Lake (Columbia County)
  • Mud Lake (Dane County)
  • Mud Lake (Dodge County)
  • Muddy Creek
  • Mukwa
  • Mullet Creek
  • Nagel
  • Namekagon Barrens
  • Navarino
  • New Auburn
  • New Munster
  • New Wood
  • Nichols Creek
  • North Bend Bottoms
  • North Branch Milwaukee River
  • Oakridge
  • Oden
  • Omer Springs
  • Otter Creek
  • Outagamie
  • Paradise Marsh
  • Paradise Valley
  • Paul J. Olson
  • Pershing
  • Peshtigo Brook
  • Peter Helland
  • Peters Marsh
  • Pierce County Islands
  • Pine Island
  • Pleasant Valley
  • Potato Creek
  • Powell Marsh
  • Poygan Marsh
  • Prince's Point
  • Quaderer's Creek
  • Rat River
  • Ray
  • Ray Morrison Memorial
  • Rice Beds Creek
  • Ridgeville
  • Rock Falls
  • Rome Pond
  • Rush River
  • Sampson
  • Sandhill
  • Schmit
  • Scuppernong River
  • Sette
  • Shaw Marsh
  • Sheboygan Marsh
  • Silvernail
  • South Beaver Creek
  • Spring Creek
  • St. Croix Islands
  • Star Prairie Seed Farm
  • Storrs Lake
  • Straight Lake
  • Swan Lake
  • Sweeny Pond
  • Swinging Gate
  • Tamarack Creek
  • Ten Mile Creek (Rusk County)
  • Ten Mile Creek (Saint Croix County)
  • Theresa Marsh
  • Thunder Lake
  • Tichigan
  • Tiffany
  • Tollefson Marsh
  • Tom Lawin
  • Totagatic Lake
  • Totogatic
  • Town Corner
  • Troy
  • Turtle Creek
  • Turtle Valley
  • Ulrich
  • Underwood
  • Van Loon
  • Vermillion River
  • Vernon
  • Vosse Coulee
  • Washington Creek
  • Waterloo
  • Waunakee Marsh
  • Weirgor Springs
  • West Taylor
  • Whalen Creek
  • White River
  • White River Marsh
  • Whitman Dam
  • Willow River
  • Wind Lake
  • Wolf River Bottoms Herb Behnke
  • Wolf River Bottoms LaSage
  • Wolf River
  • Wood County
  • Woodboro Lakes
  • Yellow River
  • Yellowstone