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Showing results for tags 'Ammonite'.
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Finally got time and patience to do some prep on this nice ammonite. Nice sutures. Got it on a trip with PFooley back in 2022 (thanks again Pfooley!). Any help with identification greatly appreciated. It is roughly 3 inches in diameter.
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Hi, first post to the forum. I have been practicing prepping with my Dremel 290 on my charmouth ammonites. The outer keel always works alright but I loose it when I get into the center and I keep ruining them. Anyone have any tips? Any other methods I can use when it comes to the center. I've tried using hand picks but the stone seems too hard. I'm going to try dripping ascorbic acid on it to loosen it but in past experience it dulls the detail and colour. Any tips much appreciated. Many thanks.
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I found this 6 cm diameter pyritized ammonite in the intertidal zone near Seatown, Dorset UK, on the Jurassic coast. Photos are fossil as found. The local fossil shop identified it as Aegoceras lataecosta. Is that correct?
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Ammonite from Middle Jurassic Inferior Oolite Formation in Dorset UK
traveltip1 posted a topic in Fossil Hunting Trips
I found this ammonite on a beach in Dorset UK. It's from the Middle Jurassic Inferior Oolite Formation. The neat thing is the calcite crystals that grew in the empty chambers. Fossil shop identified it as Parkinsonia.
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location: aarhus, denmark found: loose beach rock units: metric img1 Ive found this rock and am wondering if it is an ammonite or nautiloid fossil of some kind due to the shape. I've marked the shape I'm seeing here img2 the shape is fairly vague however i took notice of it due to the different surface texture as seen under magnification here img3 img4 compares to the surface texture of the rest of the rock seen below img5 as always any information on the specimen is appreciated
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Ammonite Submantelliceras brazoense Del Rio Formation
JamieLynn posted a gallery image in Member Collections
From the album: Texas Cretaceous Fossils: Ammonites and Nautiloids
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Heteromorph Ammonite Madagascar - real?
Harare13 posted a topic in Is It Real? How to Recognize Fossil Fabrications
Hi all, Have been out of the collecting game for a while but bought this in Madagascar recently. I don’t have much experience with heteromorph ammonites and was wondering if anyone could give some insight on to whether it is real or anything else about it? Its quite big but I unfortunately don’t have a measuring tape with me. Thanks in advance!
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Found this morning on Lewes Beach in Delaware. I've found a lot of coral but this one seems fat tire shaped--round and bulbous. Slim pickings today, too windy to disclose low tide treasures
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From the album: Lias Group fossils from the Whitby, UK region
This surf-worn cobble shows three ichthyosaur vertebrae, and six rib pieces, three on either side, with one longer one right at the surface. Insets at right show other views with other fossils showing. I think the four objects in the top-right panel are ammonite outer whorl cross-sections, possibly Dactylioceras gracile. I thought they were paddle digits initially, but after preparation they show scalloped margins. The bottom-right view shows clear ammonite cross-sections and another object similar to those in the top-right. Cobble was polished with sandpaper.© CC-BY
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Before I start, here's the disclaimer, caveat and warning : " Danger, Will Robinson, Danger! " . Muriatic acid is harmful if used incorrectly. There, I feel better now. This particular partial ammonite is from the Late Cretaceous Period (Campanian) of the inland sea which was in southeastern Utah, where I collected it on BLM land. I believe the species is Prionocyclus hyatti...or maybe Prionocyclus macombi. I struggle with these two ID's. So here it is. Tools, prepping step by step and final assessment and finish. Muriatic acid, toothbrush, gloves, a bowl of water, a rag, lots of outdoor ventilation. Ammonite is back in water after millions of years of being underground. Lets get sizzling! BTW- the acid is in a small jar just beside the red bowl. I dipped the toothbrush, then scrubbed and rinsed with the water in the bowl. Scrub and rinse, repeat. Getting into those nooks and crannies! About 10 to 15 minutes into it. A little assessment to the progress and keep on brushing. It's getting close to the look I want. However there are some areas much thicker in the tan skim of calcite so I will get to a point where I stop the acid bath, rinse it well and let it dry a spell. I think this is it...time - 30 minutes of brushing and rinsing. Muriatic acid amount used - 1.5 ounces. Next step is to let it dry overnight and then glue the cracks. I wanted the CA to wick deeply into the cracks so I used the really thin stuff. It's thinner that water...more like lighter fluid or gasoline. So I used a new tool from the utility belt - an insulin syringe. A bit tricky to load and remove the air without spilling or spraying any out through the needle. It flowed out quickly and needed the soft pressure while injecting it into the cracks. I was very cautious with this technique. The plunger needed enough pressure to start the flow and a smooth mode to not go overboard. Also, I kept the orange safety cap on it while transporting it. I gave myself the heebie-jeebies just thinking about carrying it without the safety cap on it and having an "Oops!" moment by dropping it, tripping on the stairs, and any other possible way to unintentionally inject myself with cyanoacrylate adhesive. Took a minute to dispel those thoughts. Once that was done I brought the Dremel 290 engraver with the flat tip stylus installed to chisel away some areas that the acid struggled with removing. That took about 20 minutes... no action pics. I was satisfied and gave it a dusting and damp wipe to clear off the dust, dried it in the hot Utah sun and was ready for the finishing treatment. On to the Paraloid coating. The cell phone makes the coating appear much shinier than it is. There were some very slick spots on the ammonite and they did stand out with a gleam. It's currently on the hearth standing with some other ammonites and a few slabs of petrified wood. I'm pleased with the outcome, a few sutures were revealed and the partial reveal/partial matrix cover is appealing to me. On to the next one! Steve
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Ammonite id. What species? 1. Germany. Amaltheus? 2. Germany. Amaltheus? 3. Germany. 4. Germany 5. Possibly Germany 6. Madagascar 7. Poland 8. Poland. 9. Germany. 10. Germany
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Hi all, I made it out collecting recently (finally) and collected some Oxytropidoceras type ammonites. I've made an attempt to identify them to species but don't have a lot of experience with Texas ammonites yet and the Oxytropidoceras group is a rather complicated one. I appreciate any input people may have. I believe these all come from the Kiamichi Formation, Bosque County. For the first two, Oxytropidoceras supani? uddeni? @BobWill@DPS Ammonite #1 #2 #3. Oxytropidoceras texanum maybe? #4
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New specimen from Solnhofen. Mini ammonite and fish Fin. Is it possible to determine the species?
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Gastropod or little ammonite? Localization Solnhofen, Germany. Thanks.
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Hello everyone I am a docent at the Mace Brown Museum of Natural History at the College of Charleston. We are undergoing a lot of remodeling and reorganizing of our collections and discovered that multiple of our ammonites on display had not been previously identified! I cannot provide a proper scale/measurements due to them being mounted on the wall and various other ammonites blocking my path to them since the previous curators had put them here we are unable to find any geologic information regarding these specimens. Any assistance would be greatly appreciated in identifying these ammonites as ammonites are not our strong suites over here! Sorry if any of the photos are less than ideal quality the zoom on my phone I used to take pictures is not being the best right now. Thanks in advance everyone! Additional information that I can provide however is that most of our ammonite specimens on display are from the Cretaceous with only a few belonging to the Jurassic, so I would imagine it to be most likely that these specimens I have photographed originate from the Cretaceous. - Cole
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Solnhofen ammonite. What species is It?
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I bought this ammonite as a child decades ago at Gletschergarten Luzern, Schweiz. Together with it I also bought one Dactylioceras sp. (Lias Epsilon, Schwarze Jura) I assume originally from Germany. Those were my first two fossils. Is there anyone who could determine the genus of this ammonite based on a photo of the cross-section. It is 5 cm tall.
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I took a little trip up to Eureka Springs Arkansas and figured I'd get a little quick hunting in along the way....because North Texas is, as we say, a "bit of a drive" (which means anywhere from 3-6 hours, with "fairly close" being anything under 3 hours.....). I scouted out a few locations and contacted a friend who gave me a few more locations and it's amazing what you can find in 20 minutes when you are motivated by temperatures around 106 F. It really makes you not want to be out for terribly long. Plus, my husband was waiting patiently in the car with the windows down and I didn't want him to melt. But I stumbled upon a couple of nice patches of Texas Cretaceous that I initially thought were Del Rio/Grayson Formation, but I am now convinced are Duck Creek Formation. The first spot yielded my best preserved (large) ammonite I've collected so far.....most ammonites need some prep work to get the inner whorls clean, but this one came out of the ground...just like this! (The micro ammonites which I usually collect are much cleaner, typically) Cleaned up it looks like THIS. Nice suture patterns visible. I think it is a Mortoniceras nodosa. It's 4 inches. I also found a Mortoniceras cf. ootatoorensis, but it is going to need some prep work. A few feet over was a lovely little Pliotoxaster whitei echinoid. Just a little busted test, but overall, a real beauty. 1 1/4 inch I was very confident that these were Duck Creek formation (what is shown on the Texas Geo Map for this area) but when I checked on another site directly across the road - it seemed to be a VERY different ecosystem....no large ammonites, no heart urchins, but more of the small oysters (Plicatulas) and other fauna that I associate with the Grayson formation, and pretty quickly I found a little Goniophorus echinoid that i KNOW is found in the Del Rio/Grayson formation. But right next to it was a big Bivalve Trigonia that I had not ever seen in the Del Rio! So I was confused. Getting home and looking through the HGMS book, the trigonia is a Scabrotrigonia which indeed, is found in the Duck Creek formation and apparently, to my surprise, so is Goniophorus echinoids! So okay, I'm up Duck Creek WITH a paddle.....metaphorically. LOVE these little Goniophorus scotti Big one is 3/8 inch. The Scabrotrigonia emoryi : 1 inch I also found a very small pyritized ammonite and an even smaller fish vert. But again, it was VERY hot and so that concluded my 20 minutes of fossil hunting! a pretty little Neithea texana So I collected a little bit of matrix from another site a bit off the road and it yielded some very nice little micro finds which helped to confirm my Duck Creek idea with this little Scaphites bosquensis (at least that is what I am fairly positive it is). I also had a chance to stop in at Post Oak Creek, but that will be another post! The weather has turned for the better here and the Austin Paleo Society has their Lake Texoma Field Trip planned for this month, so I may just be making my way back up to North Texas ..... fingers crossed!
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Trinity River treasures: upper woodbine/lower eagleford
Shaun-DFW Fossils posted a topic in Fossil Hunting Trips
There are two main times I try to visit my fossil sites that are specifically represented by creek or riverside formation exposures: 1) obviously right after heavy rains that create new erosion, and 2) when the water levels drop so low that fossils are revealed that were previously covered by water or algae. With water levels currently low, on Friday I revisited a Trinity River location where I’ve found ammonites along the banks. This time, the water level was low enough that I could cross the entire river without getting any deeper than my pant pockets. I looked down and spotted a 7” conlinoceras tarrantense ammonite, one of the 3 biggest I’ve found. Unfortunately, fast-moving water had a predictable effect on the exterior, so it’s very worn, but the sutures and calcite look very nice. I also found the biggest gastropod I’ve ever found, and one out of only 3-4 I’ve found in the upper woodbine/lower eagleford area (this area of uncomformity goes back and forth between the two). I am not sure of the species yet. It’s 3”x3” and bigger than even the biggest Goodland formation gastropods I’ve found, which are usually pretty impressive. Before prep and after prep photos of the river ammonite are shown. I also took only photos of an ammonite fixed atop a very large rock slab, also conlinoceras species. Not bad for a short outing! Dallas County, Texas.
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Hello! I recently bought a Cretaceous ammonite fossil from Madagascar for teaching in High School, but there is nearly no information. The seller only knows it is from Madagascar and the Cretaceous. It is also said that the fossil represents an individual of Cleoniceras sp.. Could anyone help me to confirm its identity? I have been reading a lot about the ammonites from Madagascar and guessed it could really be a Cleoniceras or an Aioloceras ammonite, but this is my first contact with such topic, therefore everything seems inconclusive. Maybe if I can get a .pdf copy of Description of Species, Nautilidea/Ammonoidea (Madagascar), it will also help me... Thanks in advance, here are the pictures I have (it has 3,0 x 2,5 cm):
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I acquired this ammonite fossil which had been dated to the Jurassic of Morocco. As you can see from the photo, it is approximately 4 cm in length. Can anyone identify the species?
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From the album: Ammonites
Schlierbach, Baden-Württemberg, Germany. Toarcian (Jurassic). Bought from a private collection. -
From the album: Ammonites
Calvados, France. Oxfordian (Jurassic). Bought from a private collection. -
From the album: Ammonites
Bajocian (Jurassic). Dagestan (Russia). Bought from a private collection. -
From the album: Ammonites
Bajocian (Jurassic). Dagestan (Russia). Bought from a private collection.
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