Paleoworld-101 Posted July 17 Share Posted July 17 (edited) I picked this piece of flint up on a beach in the UK, either in Dorset or the Isle of Wight (i can't remember exactly where). It has some odd bubbly, pustule-like structures on one side that i haven't seen on flint before. When wet, they turn slightly translucent (see last picture below). All the other sides of the piece are normal looking flint. I'm interested to know if anyone else has seen this and what causes them to form? Wet: Edited July 17 by Paleoworld-101 "In Africa, one can't help becoming caught up in the spine-chilling excitement of the hunt. Perhaps, it has something to do with a memory of a time gone by, when we were the prey, and our nights were filled with darkness..." -Eternal Enemies: Lions And Hyenas Link to comment Share on other sites More sharing options...
Fossildude19 Posted July 17 Share Posted July 17 Some botryoidal formation of mineral. Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 IPFOTM -- MAY - 2024 _________________________________________________________________________________ "In every walk with nature one receives far more than he seeks." John Muir ~ ~ ~ ~ ><))))( *> About Me Link to comment Share on other sites More sharing options...
ynot Posted July 17 Share Posted July 17 Botryoidal structures are common in silicate rock like agate or Chalcedony, not so much in chert or flint. Link to comment Share on other sites More sharing options...
Paleoworld-101 Posted July 17 Author Share Posted July 17 Interesting, any ideas what causes them to form in flint? Though it seems the formation of flint itself is already rather uncertain. Yet there's so much of it! "In Africa, one can't help becoming caught up in the spine-chilling excitement of the hunt. Perhaps, it has something to do with a memory of a time gone by, when we were the prey, and our nights were filled with darkness..." -Eternal Enemies: Lions And Hyenas Link to comment Share on other sites More sharing options...
Ludwigia Posted July 17 Share Posted July 17 I've seen these structures also rarely in flint, although I can't say what might cause them. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
ynot Posted July 17 Share Posted July 17 8 hours ago, Paleoworld-101 said: any ideas what causes them to form in flint? As far as I know they can't form in flint. They need a void too form in and flint forms as a concretion in other types of rock. Link to comment Share on other sites More sharing options...
ynot Posted July 17 Share Posted July 17 3 hours ago, Ludwigia said: I've seen these structures also rarely in flint, Are you sure it was in flint/chert? Link to comment Share on other sites More sharing options...
Ludwigia Posted July 17 Share Posted July 17 4 hours ago, ynot said: Are you sure it was in flint/chert? Yes. Greetings from the Lake of Constance. Roger http://www.steinkern.de/ Link to comment Share on other sites More sharing options...
FranzBernhard Posted July 17 Share Posted July 17 4 hours ago, ynot said: As far as I know they can't form in flint. They need a void too form in and flint forms as a concretion in other types of rock. Possible a former fossil not completely filled with sediment? Seems rare, but not unheard of. Franz Bernhard Link to comment Share on other sites More sharing options...
ynot Posted July 17 Share Posted July 17 3 hours ago, Ludwigia said: Yes. 2 hours ago, FranzBernhard said: Possible a former fossil not completely filled with sediment? Seems rare, but not unheard of. Franz Bernhard OK, I stand corrected. Link to comment Share on other sites More sharing options...
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