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Bayport Chert (Michigan)

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  • Bayport Chert (Michigan)

    Michigan Paleo and Bayport Chert
    Todd Walterspaugh, Galesburg, Michigan
    Originally published in the Central States Archaeological Journal, Vol.57, No.1, pg.22

    Pictured above are seven Paleo points found in the state of Michigan. All are of local cherts, and three are of Bayport Chert. Of all the lithic materials utilized by Michigan's Native Americans, it is perhaps the most beautiful and widely distributed. It is named for the Bayport Formation for where it outcrops and is primarily found in the Northeastern area of Southern Michigan. It is found as nodules or irregular blocks generally along the river banks. The main source for the material is in Saginaw Bay, near Bayport, in Huron County.

    It has a waxy to chalky texture and is generally light brown to medium grey in color. The material is high in fossil content and also includes quartz, which can appear as either white clouds or in a bulls-eye pattern. Other minerals present in the material include hematite, limonite and dolomite. Fossils present include sponge spicules, brachipods, bryozans and colony coral.

    Bayport Chert was utilized by all prehistoric time periods from Paleo to Late Prehistoric, with the dominant use being the Early Archaic Period and the Middle Woodland Period. Commonly seen in use for Thebes, Adena and Snyders style points. Bayport Chert was a largely distributed material and was used by Native Americans in all of Michigan's lower peninsula including as far away as Central Indiana northward into northwestern Ohio and southwestern Ontario, Canada.

    Used by permission of the publisher
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    I keep six honest serving-men (they taught me all I knew); Their names are What and Why and When and How and Where and Who.

  • #2
    Examples of Bayport chert from Tuscola and Saginaw county Michigan.

    Pink example heat altered.

    Last edited by gregszybala; 02-18-2018, 11:03 AM.


    • #3


      • #4

        Tuscola co. Michigan, Found by Karly Simerson.


        • #5
          Two frames of Bayport chert points:

          Click image for larger version  Name:	IMG_0376.JPG Views:	1 Size:	198.5 KB ID:	285819
          Both photos courtesy of member Bayport
          Searching the fields of Northwest Indiana and Southwestern Michigan