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Post by pleecan (Peter Lee) on Feb 12, 2011 21:45:10 GMT -5
Hi: Here are some Devonian microfossils from Arkona ON Canada. The Arkona Shale is part of the Hamilton Formation and these microfossils are from my fossil washings that are found on the bottom of a ultrasonic cleaner so instead of throwing out the sediments... I constructed optic systems described in the Photography section to capture images of these critters....   Having lots of fun! |
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Post by Joe Botting on Feb 12, 2011 22:39:05 GMT -5
I see ostracodes, a trilobite librigena, and that weird thing that looks like the internal mould of a crinoid column. Anything else?
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Post by pleecan (Peter Lee) on Feb 12, 2011 22:47:44 GMT -5
Arkona sediments are fun to look at..... especially if you find micro teeth
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Post by pleecan (Peter Lee) on Jun 9, 2013 7:57:46 GMT -5
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Post by pleecan (Peter Lee) on Jun 9, 2013 8:02:09 GMT -5
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Post by pleecan (Peter Lee) on Jun 9, 2013 8:07:11 GMT -5
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Post by reighan on Jun 9, 2013 8:23:45 GMT -5
Remember...There is no such thing as a stupid question...Yeah, right.... :-)
Peter, Is the (relatively) large thing roughly centre in the first new photo a tooth?
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Post by pleecan (Peter Lee) on Jun 9, 2013 13:01:47 GMT -5
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Post by reighan on Jun 9, 2013 13:36:18 GMT -5
<blush> It looks much more interesting than the line drawings I've seen would indicate. :-)
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Post by pleecan (Peter Lee) on Jun 10, 2013 7:34:08 GMT -5
These are some of the sharpest images produced. The first ostracod is Ctenoloculina sp .
PL
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Post by ammocarbsteve on Jun 10, 2013 10:04:16 GMT -5
Peter.... fantastic.... I cant believe the sharpness of the images as I can imagine the scale....
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Post by Joe Botting on Jun 10, 2013 16:15:27 GMT -5
Ostracodes can be stunning things, and the first one of these in particular is lovely. We get some gorgeous ones in the Ordovician as well; these are the Builth Inlier ones that I was looking at a while ago: asoldasthehills.org/Ostracodes.htmlYou've got it easy here, Peter - I had to take latex casts of individual valves preserved as external moulds on surfaces in mudstone, then get them into an SEM.  |
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Post by reighan on Jun 10, 2013 16:30:20 GMT -5
I'm supposed to be reading archaeology (Coursera course just started) and I'm being distracted by ostracodes. :-) Really beautiful images, Peter! Joe, the drawings are excellent too, and obviously weren't easy to get.
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Post by pleecan (Peter Lee) on Jun 20, 2013 15:11:57 GMT -5
Thanks all for you excellent comments... just came back from 5 days of fossil hunting at Arkona.. the big break through was the use of pulse AC flash unit synchronized to the digital camera shutters... that help freeze the image. The Ostracods are +220um sieve fraction.
Peter
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Post by pleecan (Peter Lee) on Jun 20, 2013 15:16:57 GMT -5
Joe: Excellent link to beautiful ostracod drawings! Must have taken a long time to draw... very elegant.
PL
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