lmacfadden Posted March 28, 2013 Share Posted March 28, 2013 Found some great fossils yesterday. Found some great Mucrospirifers (arkonensis and thedforensis), my first ammonite - though small (1.5cm) and my first Cyrtina and a few things I cannot name. I'm sorry this photo is not better... should have also taken a photo of the underside. I was out hunting with my sister near Rock Glen Ontario and she found it so it's in her posession. Otherwise I would have taken better photos of it. I searched high and low for something similar. We found this on March 27, 2013 in the Ausable river near Rock Glen, Ontario. It appears to be fossilized skin. The underside seems bony with ridges. The closest thing I could find that resembled this texture was the outer flat section of a large trilobite. Any idea what this is?? (about 2 inches wide) ~Lise MacFadden - Arkona, Ontario, Canada Link to comment Share on other sites More sharing options...
Bullsnake Posted March 28, 2013 Share Posted March 28, 2013 Those spirifers are sweet! The bumpy piece, I don't know...Placoderm? 1 Steve Link to comment Share on other sites More sharing options...
Fossildude19 Posted March 28, 2013 Share Posted March 28, 2013 (edited) Hello lmacfadden! Looks like a nice haul. Is this from Arkona? EDIT- oops - sorry I see now from near Rock Glen. Any pics of the ammonoid? Your unknown looks like a bit of placoderm armour to me. Not sure, but I belive that Peter (pleecan) has found some bit there before. Regards, Edited March 28, 2013 by Fossildude19 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "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...
Fossildude19 Posted March 28, 2013 Share Posted March 28, 2013 Haha! Steve was a bit quicker on the draw! Regards, 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "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...
lmacfadden Posted March 28, 2013 Author Share Posted March 28, 2013 Hello lmacfadden! Looks like a nice haul. Is this from Arkona? EDIT- oops - sorry I see now from near Rock Glen. Any pics of the ammonoid? Your unknown looks like a bit of placoderm armour to me. Not sure, but I belive that Peter (pleecan) has found some bit there before. Regards, YEP Hope this is clear enough... ~Lise MacFadden - Arkona, Ontario, Canada Link to comment Share on other sites More sharing options...
Northern Sharks Posted March 28, 2013 Share Posted March 28, 2013 Yup, that is a section of placoderm armour, something I have yet to find. Your "ammonoid" is actually a snail, Naticonema lineata. How are the conditions down there? I was planning to head down in the near future 1 There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
Fossildude19 Posted March 28, 2013 Share Posted March 28, 2013 Very nice. Thanks for posting them. But I think that is a gastropod. Not sure what type, but I'm sure the other locals will know it. Regards, 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "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...
Fossildude19 Posted March 28, 2013 Share Posted March 28, 2013 (edited) Doh! Out posted again! Man you guys are quick today. Good ID on that Kevin. Regards, Edited March 28, 2013 by Fossildude19 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "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...
jpc Posted March 28, 2013 Share Posted March 28, 2013 I'm gonna try to outpost fossildude... and I have nothing to say, except yes I think also a piece of placoderm. Cool. 1 Link to comment Share on other sites More sharing options...
lmacfadden Posted March 28, 2013 Author Share Posted March 28, 2013 Yup, that is a section of placoderm armour, something I have yet to find. Your "ammonoid" is actually a snail, Naticonema lineata. How are the conditions down there? I was planning to head down in the near future Not too sure about the snail - here is a better picture of it. To my naked eye it looks so much like the ammonite examples I have seen. But certainly not arguing the point since I am such an amateur and willing to learn to recognize these accurately. It's starting to dry up a bit here - but it's muddy and slippery in places. With rubber boots on, no problem. I stayed on the grassy areas as much as I could and on the large rocks that are now exposed because the levels are low enough at this time... it's great to be the first to look through what the river has washed into these rock piles! I could have been there all day!! I had planned to go to the south pit of Hungry Hollow but haven't made my way there yet. Soon!! ~Lise MacFadden - Arkona, Ontario, Canada Link to comment Share on other sites More sharing options...
Dave in Alaska Posted March 28, 2013 Share Posted March 28, 2013 I am envious. We just got snow last weekend and have more in the forcast for this weekend. 1 Link to comment Share on other sites More sharing options...
lmacfadden Posted March 28, 2013 Author Share Posted March 28, 2013 I am envious. We just got snow last weekend and have more in the forcast for this weekend. What you probably get more than we do (except for snow) is sunshine!! Living so close to the great lakes is awesome but the overhead clouds can block out so much of the sunshine we crave by spring time!! By this time we are just sick of snow and I really hope this is the last of it. The good thing about cold and frost is that it can work up those fossils to the surface and makes spring time hunting so much fun! Not to mention what the river washes our way.... :>) ~Lise MacFadden - Arkona, Ontario, Canada Link to comment Share on other sites More sharing options...
Fossildude19 Posted March 28, 2013 Share Posted March 28, 2013 Ammonites are generally (Excepting heteromorph ammonites), planispiral,(coiled in a single plain), whereas gastropods can be either trochospiral or planispiral. Your Naticonema is trochospiral. (spirally coiled chambers, evolute on one side of test (spiral side), more involute on opposite side (umbilical side).) Hope this helps. Regards, 4 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "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...
lmacfadden Posted March 28, 2013 Author Share Posted March 28, 2013 Ammonites are generally (Excepting heteromorph ammonites), planispiral,(coiled in a single plain), whereas gastropods can be either trochospiral or planispiral. Your Naticonema is trochospiral. (spirally coiled chambers, evolute on one side of test (spiral side), more involute on opposite side (umbilical side).) Hope this helps. Regards, Awesome - thanks so much for pointing out the specifics. Looks like a gastropod. My first. YAY!! Lise ~Lise MacFadden - Arkona, Ontario, Canada Link to comment Share on other sites More sharing options...
Fossildude19 Posted March 28, 2013 Share Posted March 28, 2013 (edited) Actually, although all of your finds are cool, and your first anything is neat, the more rare and noteworthy is the placoderm armor! Not many people can say they have found a piece of 380 million year old armored fish! Regards, Edited March 28, 2013 by Fossildude19 1 Tim - VETERAN SHALE SPLITTER VFOTM --- APRIL - 2015 __________________________________________________ "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...
lmacfadden Posted March 28, 2013 Author Share Posted March 28, 2013 Actually, although all of your finds are cool, and your first anything is neat, the more rare and noteworthy is the placoderm armor! Not many people can say they have found a piece of 380 million year old armored fish! Regards, REALLY??? That is so awesome... now if I could only pry it from my sister's hands, I'd be all set! I know where she got it 'cause I was there... will have to go back really soon and look again. I remember picking up a large piece that I didn't know what it was - after looking through the forum I can see that it was the center section of a trilobile - it was at least 4 inches long and maybe 2" thick around with ridges all the way down (maybe 6 rows) - reminded me somewhat of a junebug cocoon. I placed it on top of a large rock - going to go back to get it! I will post a photo of it on a new post to see what you all think. When we got to that section of rocks we had run out of time so it was a quick 15 minutes or so that we spent there so there's lots of finding to be done at that spot. ~Lise MacFadden - Arkona, Ontario, Canada Link to comment Share on other sites More sharing options...
piranha Posted March 28, 2013 Share Posted March 28, 2013 Here is a diagram of Bothriolepis canadensis to assist with identifying the section of placoderm you found. Based on the shape of the section and the orientation of posterior oblique dorsal sensory line or its groove (dlg2), it appears to be the left dorsal mixilateral plate (MxL). Congrats on all of your excellent finds! 3 Link to comment Share on other sites More sharing options...
lmacfadden Posted March 28, 2013 Author Share Posted March 28, 2013 Here is a diagram of Bothriolepis canadensis to assist with identifying the section of placoderm you found. Based on the shape of the section and the orientation of posterior oblique dorsal sensory line or its groove (dlg2), it appears to be the left dorsal mixilateral plate (MxL). Congrats on all of your excellent finds! Bothriolepis canadensis.jpg That is OUTSTANDING information!! THANK YOU so much for sharing this with me. I'm so excited I want to run right out and look there again! Lise ~Lise MacFadden - Arkona, Ontario, Canada Link to comment Share on other sites More sharing options...
Northern Sharks Posted March 28, 2013 Share Posted March 28, 2013 For comparison, Tornoceras arkonensis look the same, but are smaller, and can be found easily. The larger ones like this are rarer, or just easier to see and picked up sooner. 1 There's no limit to what you can accomplish when you're supposed to be doing something else Link to comment Share on other sites More sharing options...
Regg Cato Posted April 3, 2013 Share Posted April 3, 2013 Platyceras is not that uncommon from the area too, though I've only found two. 1 Link to comment Share on other sites More sharing options...
crinus Posted April 4, 2013 Share Posted April 4, 2013 Your placoderm is Protitanichthys sp, Here is a link to a larger piece from Arkona http://www.crinus.info/otherfossils/data/pro.htm 2 Link to comment Share on other sites More sharing options...
piranha Posted April 4, 2013 Share Posted April 4, 2013 Your placoderm is Protitanichthys sp, Here is a link to a larger piece from Arkona http://www.crinus.info/otherfossils/data/pro.htm Hi Crinus, Thanks for the informative update. Although I convinced myself the puzzle piece fit, the surface texture for Protitanichthys is obviously a much better match than Bothriolepis. Is the Arkona species similar to Protitanichthys rockportensis described from northern Michigan? Here is a LINK to an excellent open-access paper on P. rockportensis. 1 Link to comment Share on other sites More sharing options...
Malcolmt Posted April 4, 2013 Share Posted April 4, 2013 Very nice finds.. definately a gastropod as Kevin indicated. Love the placoderm plate seems bigger than the couple bits I have found there. Kevin let me know when you are heading down I have been thinking about it ....... was up at JDQ on Saturday , I did not find any too spectacular but John from up north was there and found two beauties ... 2nd lift almost gone. definately needs a good rain everything is coated in crud and it makes it hard to see things. 1 Link to comment Share on other sites More sharing options...
crinus Posted April 4, 2013 Share Posted April 4, 2013 Hi Crinus, Thanks for the informative update. Although I convinced myself the puzzle piece fit, the surface texture for Protitanichthys is obviously a much better match than Bothriolepis. Is the Arkona species similar to Protitanichthys rockportensis described from northern Michigan? Here is a LINK to an excellent open-access paper on P. rockportensis. Many people use the rockportensis name. I am guilty of it. But there has been no definitive study on the Arkona specimens to place them there. crinus 1 Link to comment Share on other sites More sharing options...
lissa318 Posted April 4, 2013 Share Posted April 4, 2013 I missed this post before! Nice finds!!! Seems like you have some great hunting spots where you are at. 1 Link to comment Share on other sites More sharing options...
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