Porter Posted January 30, 2021 Share Posted January 30, 2021 There are no pictures of this roll shaped rock before the rock crusher. It was approximately 5 inches long and 2.75 inches diameter cut off square on both ends. it had a noticeable double 1/2 spiral ripple in its length. We don't know where it came from. It was found in 1976 in a newly purchased farm house in Michigan. Link to comment Share on other sites More sharing options...
LabRatKing Posted January 30, 2021 Share Posted January 30, 2021 I see lots of chert, but I’m not certain I see any fossils. Could you point out these areas? Link to comment Share on other sites More sharing options...
Porter Posted January 30, 2021 Author Share Posted January 30, 2021 So it's not a fossil? What is a chert or is that a polite way of saying something else? Link to comment Share on other sites More sharing options...
Kane Posted January 30, 2021 Share Posted January 30, 2021 Chert is a form of crystalline quartz that regularly appears in sedimentary rocks. It tends to break in conchoidal fractures leaving a very sharp edge, which made it ideal for First Nations people to use for tools. In some formations, the presence of chert is indicative of siliceous sponges. It is possible the black item is a fossil, but it may be too fragmentary to identify. 1 ...How to Philosophize with a Hammer Link to comment Share on other sites More sharing options...
Porter Posted January 30, 2021 Author Share Posted January 30, 2021 Great, thank you Kane. Good to know after keeping it around for 45 years. Link to comment Share on other sites More sharing options...
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