BobWill Posted February 19, 2013 Share Posted February 19, 2013 (edited) This was wet when I saw it in the Cretaceous of North Sulphur River and I assumed it would be very slimy and bad-smelling, but curiosity overcame hygiene and sure enough the whole thing was rock-hard. I've seen pictures of similar looking alga posted here and wondered if anyone has a genus or even family name for my notes. Edited February 19, 2013 by BobWill Link to comment Share on other sites More sharing options...
Foshunter Posted February 19, 2013 Share Posted February 19, 2013 Bob---Can see why one would be a little leery about laying hands on it. i have hunted the river for over 25 years when I lived in Texas and off and on when vacationing there and haven't handled anything like it, hope you get an ID----Tom Grow Old Kicking And Screaming !!"Don't Tread On Me" Link to comment Share on other sites More sharing options...
Wrangellian Posted February 19, 2013 Share Posted February 19, 2013 Can you show other similar examples that lead you to believe this is algae? I would have guessed it's some sort of lava/pumice or else maybe an eroded septarian nodule, but I have been wrong before. Algae has a way of going undetected. Link to comment Share on other sites More sharing options...
ghost1066 Posted February 19, 2013 Share Posted February 19, 2013 Link to comment Share on other sites More sharing options...
Missourian Posted February 19, 2013 Share Posted February 19, 2013 It looks like boxwork to me, but I'll check my calcareous algae book for Cretaceous forms when I get home. Context is critical. Link to comment Share on other sites More sharing options...
BobWill Posted February 20, 2013 Author Share Posted February 20, 2013 I forgot about boxwork. Mine looks more like that than what I was looking at. Under "Show us your algae" you posted a weathered Calico Rock on page 2, post 24, but it's not as intricate as this and looks more like the modern algae that appears in warm creeks than mine. Link to comment Share on other sites More sharing options...
tlatoanitzin Posted February 20, 2013 Share Posted February 20, 2013 I found a rock with similar layer, the rock I found is a bull quartz, I was told here the muddy like layer could be lava too as this. But I was told also it could be nickel sulfide or silver. http://www.flickr.com/photos/51986587@N04/8486910830/in/set-72157632799995776/lightbox/ Link to comment Share on other sites More sharing options...
Wrangellian Posted February 20, 2013 Share Posted February 20, 2013 It looks like boxwork to me, but I'll check my calcareous algae book for Cretaceous forms when I get home. You have a Calcareous Algae book? Link to comment Share on other sites More sharing options...
Missourian Posted February 20, 2013 Share Posted February 20, 2013 It looks like boxwork to me, but I'll check my calcareous algae book for Cretaceous forms when I get home. I thumbed through the chapter covering Cretaceous forms, but I didn't find anything that resembled the sheets in your piece. Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted February 20, 2013 Share Posted February 20, 2013 I have three. - Calcareous Algae and Stromatolites (R. Riding) - http://www.amazon.com/Calcareous-Algae-Stromatolites-R-Riding/dp/0387523731 - Calcareous Algae (John L. Wray) - http://www.amazon.ca/Calcareous-Algae-John-L-Wray/dp/044441536X - Limestone-Building Algae and Algal Limestones (J. Harlan Johnson) - http://www.amazon.com/Limestone-Building-Algae-Limestones-Harlan-Johnson/dp/091806211X Context is critical. Link to comment Share on other sites More sharing options...
BobWill Posted February 20, 2013 Author Share Posted February 20, 2013 I thumbed through the chapter covering Cretaceous forms, but I didn't find anything that resembled the sheets in your piece. Thanks. Looking at some photos of boxwork has me convinced you're right. Link to comment Share on other sites More sharing options...
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