IonRocks Posted October 14, 2016 Share Posted October 14, 2016 . Link to comment Share on other sites More sharing options...
abyssunder Posted October 16, 2016 Share Posted October 16, 2016 Yes, it could be an ichnofossil, an infilled burrow. Looks like one of mine, although this one is from Miocene. Also here is one from Pierre Shale : " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
IonRocks Posted October 16, 2016 Author Share Posted October 16, 2016 Would you help me understand what causes there to be another ring inside the first? Making it almost donut shaped? Link to comment Share on other sites More sharing options...
abyssunder Posted October 16, 2016 Share Posted October 16, 2016 The internal circle represents the delimitation between the once empty tube (burrow) with a consistent thickness and the (later) sediment infill. 1 " We are not separate and independent entities, but like links in a chain, and we could not by any means be what we are without those who went before us and showed us the way. " Thomas Mann My Library Link to comment Share on other sites More sharing options...
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