pleecan Posted March 24, 2013 Share Posted March 24, 2013 Excellent thread! Nice specimens.... photos are well taken. Link to comment Share on other sites More sharing options...
Missourian Posted March 26, 2013 Author Share Posted March 26, 2013 Ostracods Geisina sp. Chanute Formation, Pennsylvanian Clay County, Missouri In the creek near my house, I found a bed of impure bioclastic limestone that contains abraded mollusks (bellerophontids, myalinids, Aviculopecten sp., etc.), ostracods and carbonized wood: Under the microscope, one can make out several Geisina ostracods: As it turns out, they are particularly abundant in this bed. An image of a Geisina taken with a scanning electron microscope, so you know what to look for: No, it's not my scope. Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted March 28, 2013 Author Share Posted March 28, 2013 Prolecanitid ammonoid Prouddenites sp. Muncie Creek Shale, Pennsylvanian Kansas City metro Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted March 29, 2013 Author Share Posted March 29, 2013 Trilobite Eldredgeops sp. Devonian Sylvania? Ohio (Where did stupid id card go?) The trilobite is 19 mm in length. Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted April 1, 2013 Author Share Posted April 1, 2013 More ostracods from the Chanute Formation in Clay County, Missouri.... Geisina sp. again: A perforated form, possibly Knightina sp.: These are all a bit less than 1 mm in length. Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted April 2, 2013 Author Share Posted April 2, 2013 Goniatitid ammonoid Somoholites? sp. Liberty Memorial Formation, Pennsylvanian Kansas City metro Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted April 4, 2013 Author Share Posted April 4, 2013 Goniatitid ammonoid Schistoceras sp. Winterset Limestone, Pennsylvanian Jackson County, Missouri Close up of the siphuncle and shell ornamentation: Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted April 6, 2013 Author Share Posted April 6, 2013 Orthocone cephalopod Mooreoceras sp. or Pseudorthoceras sp. Liberty Memorial Shale, Pennsylvanian Clay County, Missouri There are some intricate shell details visible: Under the microscope: The double-layered structure of the shell is striking. Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted April 7, 2013 Author Share Posted April 7, 2013 Ostracod hash Geisina sp. (and others?) Winterset Limestone, Pennsylvanian Jackson County, Missouri The ostracods are all a little less than a millimeter in length. Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted April 13, 2013 Author Share Posted April 13, 2013 Ostracods Hollinella sp. Winterset Limestone, Pennsylvanian Jackson County, Missouri Hollinella is the largest ostracod in the KC Pennsylvanian. They are still quite small: It looks like an insect head, but the entire arthropod was tucked into the bivalve shell: From the side: Close up of surface detail: Hollinella is usually found in shallow-water bioclastic limestones. These two were found in an oolitic bioclastite. Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted April 13, 2013 Author Share Posted April 13, 2013 In case you're wondering, here's what living ostracods look like.... Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted April 20, 2013 Author Share Posted April 20, 2013 Undetermined in concretion Liberty Memorial Shale, Pennsylvanian Clay County, Missouri I thought this could be fish material, but under magnification, it appears to be shelly or even chitinous. The concretion is 12 mm in length. Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted April 21, 2013 Author Share Posted April 21, 2013 Arenaceous forams "Bourbon Flags", Pleasanton Group, Pennsylvanian Linn County, Kansas The dense, massive limestone bed has a profusion of forams, but not much else. Getting a decent sample was quite difficult: I can't discern any specific genera. All tests seem to be irregular 'knots': Up close: Context is critical. Link to comment Share on other sites More sharing options...
JeanB Posted April 27, 2013 Share Posted April 27, 2013 Pretty amazing set of pics!!!! I have been looking at them for at least an hour now! Jean JeanB Montreal, QC, Canada Ordovician, Trenton group Link to comment Share on other sites More sharing options...
Missourian Posted April 28, 2013 Author Share Posted April 28, 2013 On 4/26/2013 at 7:23 PM, JeanB said: Pretty amazing set of pics!!!! I have been looking at them for at least an hour now! Jean Thanks. I think I've been looking at them for at least an hour too. Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted April 28, 2013 Author Share Posted April 28, 2013 Forams Glyphostomella sp. Argentine Limestone, Pennsylvanian Johnson County, Kansas These 1-mm forams can be recognized by script-like markings on the surface: The same piece from a different angle: The thing with polka-dots is a perforated ostracod. A second Glyphostomella can be seen on the left. Another Glyphostomella: Glyphostomella again, with an ostracod to its left: As you can tell, this limestone is quite prolific in high-quality forams and ostracods (and likely other things). A few years ago, I collected a boxful of the stuff. Someday, I'll bust through it and see what turns up. 1 Context is critical. Link to comment Share on other sites More sharing options...
missingdigits Posted May 2, 2013 Share Posted May 2, 2013 Fantastic photos. Thanks for sharing. Very cool! Not sure if you know this or not but instead of just a tap to focus if you continue holding instead of just a tap you can initiate AE/AF (auto exposure/auto lock) which will help tremendously. Basically, instead of the camera refocusing if you slightly move it locks in the focus and exposure at that point. It works great for any macro photos as it is very hard to hold your iPhone completely still even when resting it on the top of microscope. There are also a number of snap on macro lenses you can use for your iPhone for in the field photos. Hope this helps and again, great job! Link to comment Share on other sites More sharing options...
Missourian Posted May 2, 2013 Author Share Posted May 2, 2013 On 5/1/2013 at 8:18 PM, missingdigits said: Not sure if you know this or not but instead of just a tap to focus if you continue holding instead of just a tap you can initiate AE/AF (auto exposure/auto lock) which will help tremendously. Basically, instead of the camera refocusing if you slightly move it locks in the focus and exposure at that point. It works great for any macro photos as it is very hard to hold your iPhone completely still even when resting it on the top of microscope. Thanks for the tip. I'd wished I had a third hand to tap the screen (one holds the camera, while the other is used to snap the photo). Context is critical. Link to comment Share on other sites More sharing options...
missingdigits Posted May 2, 2013 Share Posted May 2, 2013 (edited) Thanks for the tip. I'd wished I had a third hand to tap the screen (one holds the camera, while the other is used to snap the photo). No third hand needed! Once you tap and hold to initiate AE/AF (it will say AE/AF Lock) on bottom of screen. Then simply take your photo as normal. It really does work and this is precisely what it was designed for. Just give it a try on anything up close before you try on your microscope. You will see what I am talking about. Let me know how it works out. Jamie PS. It helps to have grid turned on so you focus directly on the lens. Edited May 2, 2013 by missingdigits Link to comment Share on other sites More sharing options...
Missourian Posted May 2, 2013 Author Share Posted May 2, 2013 On 5/1/2013 at 9:13 PM, missingdigits said: No third hand needed! Once you tap and hold to initiate AE/AF (it will say AE/AF Lock) on bottom of screen. Then simply take your photo as normal. It really does work and this is precisely what it was designed for. Just give it a try on anything up close before you try on your microscope. You will see what I am talking about. Let me know how it works out. Jamie PS. It helps to have grid turned on so you focus directly on the lens. Yeah, I already tried it on a character on my black keyboard (I'm at work right now). Context is critical. Link to comment Share on other sites More sharing options...
missingdigits Posted May 2, 2013 Share Posted May 2, 2013 Yeah, I already tried it on a character on my black keyboard (I'm at work right now). So did the spontaneous joy of this golden discovery make you soil yourself at work and cause massive embarrassment on the job? I am terribly sorry if this is indeed the case..... Link to comment Share on other sites More sharing options...
Missourian Posted May 2, 2013 Author Share Posted May 2, 2013 No, I can embarrass and soil myself at work without any golden discoveries.... Sorry about the confusion.... I tend to think two or three steps ahead and then blurt something out without providing a little background. By 'character' on my 'black keyboard', I was referring to the little white 'window' on the black key (Dell keyboard) that brings up the start menu. The iPhone annoyingly overexposes white areas surrounded by darker ones (I really had fits with the conodonts on black shale posted on the first page in this thread). I tried the AE/AF Lock on the key, and it worked like a charm. Context is critical. Link to comment Share on other sites More sharing options...
missingdigits Posted May 2, 2013 Share Posted May 2, 2013 No, I can embarrass and soil myself at work without any golden discoveries.... Sorry about the confusion.... I tend to think two or three steps ahead and then blurt something out without providing a little background. By 'character' on my 'black keyboard', I was referring to the little white 'window' on the black key (Dell keyboard) that brings up the start menu. The iPhone annoyingly overexposes white areas surrounded by darker ones (I really had fits with the conodonts on black shale posted on the first page in this thread). I tried the AE/AF Lock on the key, and it worked like a charm. RIght on. I was trying to be funny, sorry. I have noticed this problem too of overexposure but rectify it with auto-locking on an area that shows proper exposure that is actually outside of what you want to focus on. For macro shots the focus is the same when you use AE/AF lock. If you try AE/AF and it looks bad (you will know when you lock it in if it's overexposed or not- as you know) simply tap and hold to another darker area outside of the main focal point. It will adjust and you get a sort of "preview" as to how it will look as you are auto locking it. I am terribly sorry if this sounds convoluted or you already know this. Most people don't and it's a great feature. Jamie Link to comment Share on other sites More sharing options...
Missourian Posted May 2, 2013 Author Share Posted May 2, 2013 On 5/1/2013 at 9:56 PM, missingdigits said: RIght on. I was trying to be funny, sorry. I have noticed this problem too of overexposure but rectify it with auto-locking on an area that shows proper exposure that is actually outside of what you want to focus on. For macro shots the focus is the same when you use AE/AF lock. If you try AE/AF and it looks bad (you will know when you lock it in if it's overexposed or not- as you know) simply tap and hold to another darker area outside of the main focal point. It will adjust and you get a sort of "preview" as to how it will look as you are auto locking it. I am terribly sorry if this sounds convoluted or you already know this. Most people don't and it's a great feature. Jamie No need to apologize for humor. As for the AE/AF trick, I'll soon try it out on some amazing white Ammovertella forams in darkish-gray limestone that I'd just noticed in my collection. Context is critical. Link to comment Share on other sites More sharing options...
Missourian Posted May 8, 2013 Author Share Posted May 8, 2013 Fish (or tetrapod) bone detail Muncie Creek Shale, Pennsylvanian Kansas City metro For a lack of a proper name, I've nicknamed these 'chicken bones'. Context is critical. Link to comment Share on other sites More sharing options...
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