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    • Discover Devonian Period fossils

      • Sinkholes are fascinating locations to discover Devonian Period fossils from prehistoric life 400+ million years ago. Also keep a close eye out for unique plant life as the environment in the bottom of some sinkholes is home to flora not found anywhere else in Northern Michigan.
      www.visitalpena.com › adventures › sinkholes

      Sinkholes - Visit Alpena

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  3. www.visitalpena.com › adventures › sinkholesSinkholes - Visit Alpena

    Sinkholes are fascinating locations to discover Devonian Period fossils from prehistoric life 400+ million years ago. Also keep a close eye out for unique plant life as the environment in the bottom of some sinkholes is home to flora not found anywhere else in Northern Michigan.

  4. mnfi.anr.msu.edu › description › 10707Sinkhole - Michigan Natural Features Inventory

    • Graminoids
    • Forbs
    • Ferns
    • Shrubs
    • Trees
    big bluestem (Andropogon gerardii)
    blue-joint (Calamagrostis canadensis)
    sedges (Carex aurea, C. eburnea, C. flava, C. pensylvanica, C. viridula, and others)
    twig-rush (Cladium mariscoides)

    See full list on mnfi.anr.msu.edu

    wild sarsaparilla (Aralia nudicaulis)
    jack-in-the-pulpit (Arisaema triphyllum)
    wormwood (Artemisia campestris)
    harebell (Campanula rotundifolia)

    See full list on mnfi.anr.msu.edu

    lady fern (Athyrium filix-femina)
    rattlesnake fern (Botrypus virginianus)
    bulblet fern (Cystopteris bulbifera)
    oak fern (Gymnocarpium dryopteris)

    See full list on mnfi.anr.msu.edu

    bearberry (Arctostaphylos uva-ursi)
    sweetfern (Comptonia peregrina)
    bunchberry (Cornus canadensis)
    gray dogwood (Cornus foemina)

    See full list on mnfi.anr.msu.edu

    balsam fir (Abies balsamea)
    sugar maple (Acer saccharum)
    paper birch (Betula papyrifera)
    American beech (Fagus grandifolia)

    See full list on mnfi.anr.msu.edu

  5. www.visitalpena.com › sinkhole-exploration-in-alpenaSinkhole Exploration in Alpena - Visit Alpena

    Did you know more than 200 sinkholes dot the landscape across Northeast Michigan? Mary Beth explains the geology behind how sinkholes are formed and visits some of Alpena’s most popular sinks.

  6. www.michigan.org › property › sinkhole-pathwaySinkhole Pathway | Michigan

    The Sinkhole Pathway, encircling a sinkhole area in a heavily wooded forest, provides a hike unlike any other. The area features karst topography characterized by natural limestone, where underground streams dissolve the rock into a series of large caves.

    • MI
    • (989) 733-8279

  7. www.visitalpena.com › places › sinkholes-at-rockportSinkholes at Rockport State Recreation Area - Visit Alpena

    Rockport is Michigan’s 100th State Park and is the first State Park where you are allowed to take a piece of it home with you. There are 13 sinkholes located at Rockport as a result of the Karst topography of the area.

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  9. gandernewsroom.com › 2023/07/26 › from-ice-caves-toFrom ice caves to sinkholes, these are Michigan's 15 coolest ...

    Jul 26, 2023 · Michigan’s Sinkholes Another lesser known natural phenomenon in Michigan: sinkholes. No, not the ones that close down the road you take to work or the one that potentially puts your house at risk, but rather large, natural sinkholes that have existed for years and offer fun hiking opportunities.

  10. www.gaylordmichigan.net › blog › exploring-gaylordsExploring Gaylord’s Sinkhole Lakes - Gaylord Michigan Area ...

    Not only is venturing out into The Pigeon an adventure in its own right, but the sinkhole lakes add an extra splash of intrigue. Aqua and turquoise on the surface, these small forest lakes take a serious plunge in the center, some reaching depths of 60 feet.

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