Age and paleoclimatic significance of Lake Michigan beach ridges at Baileys Harbor, Wisconsin

Late-Holocene Formation of Lake Michigan Beach Ridges Correlated with a 70-yr Oscillation in Global Climate

Quaternary Research ◽

10.1006/qres.1996.0033 ◽

1996 ◽

Vol 45 (3) ◽

pp. 321-326 ◽

Cited By ~ 15

Author(s):

Paul A. Delcourt ◽

William H. Petty ◽

Hazel R. Delcourt

Keyword(s):

Late Holocene ◽

Lake Michigan ◽

Global Climate ◽

Temperature Oscillation ◽

Beach Ridges ◽

Climate Fluctuations ◽

The Past ◽

Fundamental Part ◽

Atmosphere System ◽

Centennial Time Scale

AbstractA radiocarbon-dated series of 75 beach ridges, formed at regular intervals averaging 72 yr over the past 5400 yr, provides further support for the existence of a 70-yr oscillation in Northern Hemisphere climate, postulated recently from instrument data representing less than two cycles of this climate oscillation. Results from this study lend support to the interpretation that internal variations in the ocean–atmosphere system are an important factor in climate fluctuations on a decadal–centennial time scale. A temperature oscillation with a period of about 70 yr has been a previously unrecognized but fundamental part of the global climate system since at least the middle Holocene.

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Lake Michigan Beach-Ridge and Dune Development, Lake Level, and Variability in Regional Water Balance

Quaternary Research ◽

10.1006/qres.1995.1062 ◽

1995 ◽

Vol 44 (2) ◽

pp. 181-189 ◽

Cited By ~ 36

Author(s):

John Lichter

Keyword(s):

Water Balance ◽

Lake Level ◽

Lake Michigan ◽

Plant Macrofossils ◽

Time Intervals ◽

Beach Ridges ◽

Average Return ◽

High Lake Level ◽

High Level ◽

Regional Water

AbstractA sequence of northern Lake Michigan beach ridges records lake-level fluctuations that are probably related to changes in late Holocene climate. Historically, episodes of falling and low lake level associated with regional drought led to the formation of dune-capped beach ridges. The timing of prehistoric ridge formation, estimated by radiocarbon dating of plant macrofossils from early-successional dune species, shows that return periods of inferred drought, averaged for time intervals of 100 to 480 yr, ranged between 17 and 135 yr per drought during the last 2400 yr. In five of ten of these time intervals, the average return period ranged between 17 and 22 yr per drought. These intervals of frequent ridge formation and drought were associated with the development of parabolic dunes, which is indicative of high lake level and moist climate. This seeming paradox suggests that unusually moist decades alternated with unusually dry decades during these time intervals. Regional water balance probably varied less during the time intervals when ridges formed less often and the lake produced no evidence of high level.

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AMS Radiocarbon Dating of Lake Michigan Beach-Ridge and Dune Development

Quaternary Research ◽

10.1006/qres.1997.1904 ◽

1997 ◽

Vol 48 (1) ◽

pp. 137-140 ◽

Cited By ~ 15

Author(s):

John Lichter

Keyword(s):

Radiocarbon Dating ◽

Lake Level ◽

Sand Dune ◽

Lake Michigan ◽

Beach Ridge ◽

Radiocarbon Dates ◽

Beach Ridges ◽

Ams Radiocarbon Dating ◽

Climate Fluctuations ◽

Radiocarbon Chronology

Strandplains of shore-parallel beach ridges bordering the Great Lakes are valuable for reconstructing histories of climate-related lake-level fluctuations. However, imprecise radiocarbon dates of ridge formation have frustrated development of dependable chronologies from which information about variation in the frequency of ridge formation and inferred climate fluctuations can be obtained. The resolution and precision of radiocarbon chronologies can be improved with AMS 14C dates of roots and rhizomes of plant species associated with the formation and growth of the sand-dune caps of breach ridges. These dates reliably estimate the timing of shore progradation when the base of the previously established beach ridge becomes inundated by the water table. An AMS radiocarbon chronology of beach-ridge formation in northern Lake Michigan shows that information about variation in the frequency of ridge formation is important for paleoclimatic interpretation.

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REFINING THE LATE HOLOCENE OUTLET PALEOHYDROGRAPH FOR LAKE MICHIGAN-HURON WITH THE IPPERWASH PALEOHYDROGRAPH OR CLOSEST AND MOST COMPLETE STRANDPLAIN OF BEACH RIDGES TO THE OUTLET

10.1130/abs/2020nc-348282 ◽

2020 ◽

Author(s):

Sean Morrison ◽

◽

John W. Johnston ◽

Kenneth Lepper

Keyword(s):

Late Holocene ◽

Lake Michigan ◽

Beach Ridges

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Ultrastructure of Melosira resting cell rejuvenation

Proceedings, annual meeting, Electron Microscopy Society of America ◽

10.1017/s042482010011355x ◽

1984 ◽

Vol 42 ◽

pp. 734-735

Author(s):

C. E. M. Bourne ◽

L. Sicko-Goad

Keyword(s):

Electron Microscopy ◽

Lake Michigan ◽

Light And Electron Microscopy ◽

Resting Cells ◽

Planktonic Diatoms ◽

Resting Cell ◽

Vegetative Survival ◽

Cytological Changes ◽

Recent Attention ◽

Freshwater Diatom

Much recent attention has been focused on vegetative survival forms of planktonic diatoms and other algae. There are several reports of extended vegetative survival of the freshwater diatom Melosira in lake sediments. In contrast to those diatoms which form a morphologically distinct resistant spore, Melosira is known to produce physiological resting cells that are indistinguishable in outward morphology from actively growing cells.We used both light and electron microscopy to document and elucidate the sequence of cytological changes during the transition from resting cells to actively growing cells in a population of Melosira granulata from Douglas Lake, Michigan sediments collected in mid-July of 1983.

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