terriW Posted November 30, 2011 Share Posted November 30, 2011 this algae is a pretty common find along our river here in NE iowa....and i thought i'd share a few items for my niece who seems interested in tagging along with aunt terri kayaking and poking around on sand bars...(an easy christmas present!) but once i got home this piece doesnt have the same texture..and that hole with what looks like a gastropod is odd... including other pictures of 'normal' receptaculites in cross section and the flat surface..some patterns really do look like a sunflower! this 'hole' is about an inch across on the bottom...and the channels brought my question as to what this might be... 1 Link to comment Share on other sites More sharing options...
Indy Posted November 30, 2011 Share Posted November 30, 2011 Mmmm... Receptaculites (cross section) Reminds me of one I found in Missouri Website Link Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
Rob Russell Posted November 30, 2011 Share Posted November 30, 2011 Picture number three reminds me of the alveolites I find here in northern illinois. Finding my way through life; one fossil at a time. Link to comment Share on other sites More sharing options...
terriW Posted December 1, 2011 Author Share Posted December 1, 2011 the piece in question has no other identifying marks on it.. the back side is bare as is most of the face but for this 'volcano' design... Link to comment Share on other sites More sharing options...
piranha Posted December 1, 2011 Share Posted December 1, 2011 Here is another one from the Ordovician of Missouri: Receptaculites oweni Kimmswick Fm - 15cm Link to comment Share on other sites More sharing options...
Indy Posted December 1, 2011 Share Posted December 1, 2011 Here is another one from the Ordovician of Missouri: Receptaculites oweni Kimmswick Fm - 15cm Classic beautiful specimen Nothing less would be in your collection Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
Caleb Posted December 1, 2011 Share Posted December 1, 2011 Hmm, nice finds, I love the looks of Receptaculites in cross section... Just picked one up in your neck of the woods last weekend. As far as your mystery item, I'm not sure what it is. I can tell you that it is definitely from the Stewartville member of the Galena formation(Upper Ordovician) and the gastropod on the bottom of the photo is a partial Hormatoma major. I have some ideas on the other item, but I will have to get back tomorrow(all my PDF's are on my work computer). Caleb Midwestpaleo.com Link to comment Share on other sites More sharing options...
Missourian Posted December 1, 2011 Share Posted December 1, 2011 We have related algae in the Pennsylvanian, but they are very difficult to find, as they are almost microscopic and are usually fragmented. I would love to bring home one of those sunflowers from the MO Ord. Context is critical. Link to comment Share on other sites More sharing options...
ashcraft Posted December 1, 2011 Share Posted December 1, 2011 The recepticulites is found in the Kimmswick here is this part of Missouri. It is exposed along the Mississippi here in Scott County. We were poking around one day, and found an entire reef of the material. Quite amazing, need to go back and get some photos. Brent Ashcraft ashcraft, brent allen Link to comment Share on other sites More sharing options...
Missourian Posted December 1, 2011 Share Posted December 1, 2011 The recepticulites is found in the Kimmswick here is this part of Missouri. It is exposed along the Mississippi here in Scott County. We were poking around one day, and found an entire reef of the material. Quite amazing, need to go back and get some photos. Brent Ashcraft Yes, please! Context is critical. Link to comment Share on other sites More sharing options...
terriW Posted December 1, 2011 Author Share Posted December 1, 2011 since you know this area caleb, i found this piece in question just upstream from the park in kendalville, but below the first cold water spring along that bluff... nice display of the algae structure indy! we see bits and pieces all the time, i have some larger specimens but they're pretty worn down... so am i right or wrong on that third photo with the dime?..rob suggested alveolites?..appears very similar... seems weather may finally change to winter any hour, so my days of hunting this rare low water levels may soon come to a close! Link to comment Share on other sites More sharing options...
Caleb Posted December 1, 2011 Share Posted December 1, 2011 From what I can gather, Alveolites seems to be a Silurian-Devonian coral. What you have in pic 3 looks like a worn piece of Receptaculites. I'm still milling over the mystery item, I'm leaning toward the underside of the bottom whorl of a gastropod. Caleb Midwestpaleo.com Link to comment Share on other sites More sharing options...
Indy Posted December 1, 2011 Share Posted December 1, 2011 so am i right or wrong on that third photo with the dime?..rob suggested alveolites?..appears very similar... These old eyes see Receptaculites. Not familiar with the coral Alveolites...so I did a quick search Interesting page on the subject wih some pictures: My Link Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
terriW Posted December 1, 2011 Author Share Posted December 1, 2011 when i camera battery recharges i'll try some more shots of this critter and see if that helps... Link to comment Share on other sites More sharing options...
terriW Posted December 1, 2011 Author Share Posted December 1, 2011 really tough to make sense of this with a snapshot! this shows most of what this has to offer gives you an idea of the depth a fairly flat profile.. Link to comment Share on other sites More sharing options...
Indy Posted December 1, 2011 Share Posted December 1, 2011 (edited) Edited to help these old eyes I see stess and or striations at 6 O'Clock possible shell material or mineral deposit on on the wall of the depression I see a gastropod-like shape on the rim Edited December 1, 2011 by Indy Flash from the Past (Show Us Your Fossils)MAPS Fossil Show Link to comment Share on other sites More sharing options...
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