IowaRocker Posted January 23 Share Posted January 23 I have recently discovered my interest in rock hounding. From my small/moderate amount of research, I am guessing that this is Stromatolite. I found it in a yard bordering a graveyard in Maquoketa, IA. I would love to know a little more about it,. It weighs right around 4 lbs. At the one end, it appears that some form of fossil had burrowed in. Link to comment Share on other sites More sharing options...
FranzBernhard Posted January 23 Share Posted January 23 Welcome to TFF from Austria! Hm, I am not sure if this is a stromatolite. Would you like to provide close up pics of #1 and #3? I would like to see if there is any regular internal structure. Thank you! Franz Bernhard 2 Link to comment Share on other sites More sharing options...
Yoda Posted January 23 Share Posted January 23 I am not convinced either MotM August 2023 - Eclectic Collector Link to comment Share on other sites More sharing options...
Shaun-DFW Fossils Posted January 23 Share Posted January 23 Looks like part of a clam shell 1 Link to comment Share on other sites More sharing options...
Al Dente Posted January 23 Share Posted January 23 Stromatoporoid is another possibility. 2 Link to comment Share on other sites More sharing options...
Rockwood Posted January 23 Share Posted January 23 The uniform thickness of the layering does suggest stromatoporoid. The structure might be there, but we need to get just a bit closer. Link to comment Share on other sites More sharing options...
westcoast Posted January 23 Share Posted January 23 I'm not seeing either stromatolite or stromatoporoid in this. Maybe close images might change that. Link to comment Share on other sites More sharing options...
IowaRocker Posted January 24 Author Share Posted January 24 I took more pictures at what is hopefully close up enought. If not, I am open to any suggestions regarding using an iphone 12. Thank you for all of the feedback. I am very humbled by it and the knowledge. 1 Link to comment Share on other sites More sharing options...
FranzBernhard Posted January 25 Share Posted January 25 Thanks for the additional pics! Still not sure. At least not a piece of a clam shell. Stromatoporoid is still a possibility. Franz Bernhard 1 Link to comment Share on other sites More sharing options...
Rockwood Posted January 25 Share Posted January 25 I've found many pieces of material very similar to this mixed in with tabulate corals and recognizable stromatoporoids. I've also read about algae being a significant component of reefs. Could this be such an alga? 1 Link to comment Share on other sites More sharing options...
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