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  • Jellyfish Impression


    Images:

    oilshale

    Taxonomy

    Jellyfish

    Kingdom: Animalia
    Phylum: Cnidaria
    Class: Scyphozoa
    Order: Indet.
    Family: Indet.
    Genus: Indet.
    Species: Indet.

    Geological Time Scale

    Eon: Phanerozoic
    Era: Paleozoic
    Period: Cambrian
    Sub Period: None
    Epoch: Furongian

    Stratigraphy

    Elk Mound Group
    Mount Simon Sandstone or Wonewoc Formation

    Provenance

    Acquired by: Purchase/Trade

    Dimensions

    Diameter: 1.5 cm

    Location

    Krukowski Quarry
    Marathon County
    Wisconsin
    United States

    Comments

    The diameter of the dark colored depression is about 1.5 cm. Around this depression there are only very faintly indicated ring-shaped structures with a diameter of about 4 cm. On the slab there is another smaller impression of a second medusa.

    The Krukowski Quarry near Mosinee, Wisconsin is well known for abundant ichnofossil impressions of Climactichnites and Protichnites together with hundreds of beached  jellyfish. Jellyfish impressions up to 70 cm in diameter were found on several bedding layers, so far the largest jellyfish in the fossil record. The largest recent form, the lion's mane jellyfish, can have a bell with a diameter of 210 centimetres (7 feet) and tentacles around 36.6 m (120 ft) long. This site was apparently beach and shoreline at least some of the time during the late Cambrian. Fossils and tracks are from either the Mount Simon Sandstone or from the Wonewoc Formation and are preserved in medium to coarse grained sandstone.

    Identified by oilshale.

    Reference:

    Hagadorn, James W., Dott, Robert H. Jr., Damrow, Dan (2002) Stranded on a Late Cambrian shoreline: Medusae from central Wisconsin. Geology 30(2) pp. 147-150.

     




    User Feedback


    SilurianSalamander

    Posted

    Woah! I live pretty close to there. How do you get into the quarry? Are you allowed to just take stuff? Thanks!

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    Fossildude19

    Posted

    1 hour ago, SilurianSalamander said:

    Woah! I live pretty close to there. How do you get into the quarry? Are you allowed to just take stuff? Thanks!

     

    Oilshale acquired this by purchase/trade.

    He probably doesn't know information to help you out with that.

     

    aquired by.JPG

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