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Thread: Lead sheathing, spikes and a strange fossil/ petrified object that responds like iron

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  1. #1

    Sep 2012
    474
    111 times
    All Types Of Treasure Hunting

    Lead sheathing, spikes and a strange fossil/ petrified object that responds like iron

    Got out for a little zero visibility work with the Aquapulse today.

    The sheathing fragments are definitely lead...which leads me to believe they may be from a very early vessel...before 1690?? I could be wrong on this...experts please chime in...

    The object that looks like a chunk of wood is the real stumper, though.
    It is very heavy for its size...when I found it I could not see it and so I thought it was just a chunk of iron.
    When I got back into the boat at the end of the day I looked at it...and thought sure it was a chunk of fossilized bone...not uncommon in the area it was found. I turned back on the detector and sure enough, the Aquapulse picked it up, though not nearly as strongly as it would a normal iron object of its size. I started looking a little closer and now I am thinking it is possibly some sort of wood that has petrified or mineralized in some way so as to be detectable. Let me state clearly: this thing is hard as a rock. I tested it with my Xterra 70 and it reads a dead -8...in other words, pretty much pure iron. But it is completely non-magnetic !!

    I know that fossils can be formed by minerals gradually replacing organic matter over time, but I have never heard of a piece of wood or bone (I am still not sure which) becoming fossilized and replaced by iron. Has anyone heard of such a thing?

    Click image for larger version. 

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    Last edited by Jolly Mon; Aug 02, 2013 at 10:20 PM.

  2. #2
    us
    Frank

    Jun 2013
    Jefferson City, Tennessee
    JW Fisher Pulse 8X; Minelab CTX 3030 & Sovereign Elite; White's GMT, GM II, Beach Hunter Id, Surf PI, Coinmaster Classic II, 6000 Di S2, Two 2000-D S3's, old GM 66-T with 5 coils & GM 65-T with 3 coil
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    Nice finds! I don't know anything about the lead fragments. However, I do believe that you found a piece of bone! As far as it showing as iron, bone have marrow in them and marrow contains iron and the iron in the bone could have undergone a change when it became petrified. There is also the possibility that it was stuck under or up against a cannon or other iron object for nearly 300 years and absorbed some of the iron oxide and the piece of iron rusted and degraded. The color of the end of the bone leads me to believe that the latter is the case! Even if it is wood and not bone, the same may be the case.


    Frank
    Last edited by huntsman53; Aug 03, 2013 at 06:59 PM.

  3. #3

    Sep 2012
    474
    111 times
    All Types Of Treasure Hunting
    Quote Originally Posted by huntsman53 View Post
    Nice finds! I don't add anything about the lead fragments. However, I do believe that you found a piece of bone! As far as it showing as iron, bone have marrow in them and marrow contains iron and the iron in the bone could have undergone a change when it became petrified. There is also the possibility that it was stuck under or up against a cannon or other iron object for nearly 300 years and absorbed some of the iron oxide and the piece of iron rusted and degraded. The color of the end of the bone leads me to believe that the latter is the case! Even if it is wood and not bone, the same may be the case.


    Frank
    Thanks for the input. I think you must be on the right track. You got me thinking a little bit and I tested the thing with my Garrett pro-pointer and got a consistent signal over the entire surface area, front and back...the iron must have replaced the original material pretty completely, yet not enough to support magnetism.

  4. #4

    Sep 2005
    411
    87 times
    Bone from dinosaur that liked spinach?
    Sorry man... Had to do it... Lame, I know, but just had to...

  5. #5
    us
    Frank

    Jun 2013
    Jefferson City, Tennessee
    JW Fisher Pulse 8X; Minelab CTX 3030 & Sovereign Elite; White's GMT, GM II, Beach Hunter Id, Surf PI, Coinmaster Classic II, 6000 Di S2, Two 2000-D S3's, old GM 66-T with 5 coils & GM 65-T with 3 coil
    2,253
    1003 times
    Prospecting
    Quote Originally Posted by Jolly Mon View Post
    Thanks for the input. I think you must be on the right track. You got me thinking a little bit and I tested the thing with my Garrett pro-pointer and got a consistent signal over the entire surface area, front and back...the iron must have replaced the original material pretty completely, yet not enough to support magnetism.
    If you can take the piece to an Archaelogical/Anthropology department of a University or even Museum, they should be able to tell you if it is wood or bone. In any case, I would definitely return to the site to look for the Iron obeject involved with the change. You could have a much more rewarding day!


    Frank

  6. #6

    May 2012
    12,098
    3865 times
    All Types Of Treasure Hunting
    It looks like a section of fossil giant tortoise shell that became mineralized in soil with high iron content.
    You pretty much answered your own question.
    Last edited by GatorBoy; Aug 04, 2013 at 10:46 AM.

  7. #7

    May 2012
    12,098
    3865 times
    All Types Of Treasure Hunting
    I find fossil shark teeth occasionally that read on my detector.

  8. #8

    Sep 2012
    474
    111 times
    All Types Of Treasure Hunting
    OK, we will roll with that hypothesis...I have found many strange things that respond to a metal detector...old bricks, ballast rocks, etc...just never a fossil. I did not realize it was common.

  9. #9
    us
    Frank

    Jun 2013
    Jefferson City, Tennessee
    JW Fisher Pulse 8X; Minelab CTX 3030 & Sovereign Elite; White's GMT, GM II, Beach Hunter Id, Surf PI, Coinmaster Classic II, 6000 Di S2, Two 2000-D S3's, old GM 66-T with 5 coils & GM 65-T with 3 coil
    2,253
    1003 times
    Prospecting
    Quote Originally Posted by Jolly Mon View Post
    OK, we will roll with that hypothesis...I have found many strange things that respond to a metal detector...old bricks, ballast rocks, etc...just never a fossil. I did not realize it was common.
    Jolly Mon,

    Considering the geology of the Florida Coasts and their' make-up, it is doubtful that there are significant deposits of Iron where you found the piece. Therefore, the introduction of Iron to rust and decompose which would be absorbed by the object, had to come from somewhere or something and I believe that somewhere or something, is an Iron piece from an old shipwreck!


    Frank

  10. #10

    May 2012
    12,098
    3865 times
    All Types Of Treasure Hunting
    Good luck with that..
    You should see our well water.
    The side of my house is orange because of the iron content.
    I don't know where you learned about Florida geology.
    Anyway nice finds.

  11. #11

    Sep 2012
    474
    111 times
    All Types Of Treasure Hunting
    Quote Originally Posted by huntsman53 View Post
    Jolly Mon,

    Considering the geology of the Florida Coasts and their' make-up, it is doubtful that there are significant deposits of Iron where you found the piece. Therefore, the introduction of Iron to rust and decompose which would be absorbed by the object, had to come from somewhere or something and I believe that somewhere or something, is an Iron piece from an old shipwreck!


    Frank
    Actually, I did not find these items on the Treasure Coast. I found them in South Carolina. I don't know where the iron content came from to mineralize the fossil, but I am almost certain I have located quite an old vessel of some sort. I have a large rounded cobble ballast pile, the spikes and the lead sheathing. There are no natural rocks of any size in this area of South Carolina, but I have a big pile of fairly large rounded cobbles---there is no doubt I have a vessel of some sort...just trying to nail down the age and determine exactly what it is...not being able to see anything makes the process much more difficult and time consuming. The water tends to clear up a bit in the winter...and I might get a foot or two of visibility on really good days...we will see...

  12. #12

    May 2012
    12,098
    3865 times
    All Types Of Treasure Hunting
    Best of luck to you.. very interesting finds for sure. I hope you come up with a nice big reale with clear markings on your next trip.

  13. #13
    us
    Frank

    Jun 2013
    Jefferson City, Tennessee
    JW Fisher Pulse 8X; Minelab CTX 3030 & Sovereign Elite; White's GMT, GM II, Beach Hunter Id, Surf PI, Coinmaster Classic II, 6000 Di S2, Two 2000-D S3's, old GM 66-T with 5 coils & GM 65-T with 3 coil
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    1003 times
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    Quote Originally Posted by GatorBoy View Post
    Good luck with that..
    You should see our well water.
    The side of my house is orange because of the iron content.
    I don't know where you learned about Florida geology.
    Anyway nice finds.
    Well! I maybe wrong but I was always under the impression that much of the rock on the ocean floor around Florida's coasts, especially the East coasts down through the Florida Keys were primarily Limestone due to dead Coral. I did not say inland but it doesn't really matter since the O.P. found the items on or off the South Carolina coast. Oh and by the way, a lot of the homes in Key West with Stucco exteriors also show a lot of orange on the bottom 1/3rd of the walls but I believe this is due to the old rusted water and sewer pipes that plaque the island.


    Frank
    Last edited by huntsman53; Aug 04, 2013 at 10:50 PM.

  14. #14

    May 2012
    12,098
    3865 times
    All Types Of Treasure Hunting
    Yeah..it doesn't really matter now but..that fossil came from a giant land tortoise that was alive before the reef your referring to existed and that section of ocean floor was dry land.
    Same with Florida.
    Last edited by GatorBoy; Aug 04, 2013 at 11:03 PM.

  15. #15
    Charter Member
    us
    Pirate of the Martires

    Feb 2005
    Pinellas Park, Florida
    Aquapulse, J.W. Fisher Proton 3, Pulse Star II
    2,507
    166 times
    Shipwrecks
    The orange color comes from sulfur.

 

 
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