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Showing results for tags 'Miocene'.
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Borneo Amber (Upper Nyalau Fm., 20.44-15.97 Ma)
Barrelcactusaddict posted a gallery image in Member Collections
From the album: Fossil Amber and Copal: Worldwide Localities
Borneo Amber Merit Block Coal Deposits Kapit Division, Sarawak State, Malaysia Upper Nyalau Formation 20.44-15.97 Ma Weight: 351.5 grams Dimensions: 123 x 86 x 45 millimeters *Fluorescence under 365nm UV light The specimen arrived freshly cut from what was a larger, football-sized specimen; with a minor amount of shaping/sanding, I then polished it as best I could. This material is very soft, so a glassy polish similar to that of harder ambers isn't possible. Borneo amber is essentially coeval in age with Sumatra amber, or at least its Formations (upper Gumai, Air Benakat, and lower Muara Enim), being Early to Middle Miocene in age. Like Sumatra amber, it is derived from a dipterocarp tree source, and is similar in color, clarity, and hardness. Both ambers also were deposited during periods of active volcanism, and indicators are easily seen in much material (esp. Sumatra amber): light-colored, opaque "swirls" are a common sight and are actually tiny suspended droplets of congealed resin, having formed in the presence of considerable heat. Direct and indirect effects of volcanism, such as reduced light due to ash clouds, caused great stress to the resin-producing trees, and enormous quantities of resin were produced: the largest single specimen of amber in the world was uncovered in Sarawak, and weighed 68 kilograms (~150 pounds).© Kaegen Lau
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Borneo Amber (Upper Nyalau Fm., 20.44-15.97 Ma)
Barrelcactusaddict posted a gallery image in Member Collections
From the album: Fossil Amber and Copal: Worldwide Localities
Borneo Amber Merit Block Coal Deposits Kapit Division, Sarawak State, Malaysia Upper Nyalau Formation 20.44-15.97 Ma Weight: 351.5 grams Dimensions: 123 x 86 x 45 millimeters The specimen arrived freshly cut from what was a larger, football-sized specimen; with a minor amount of shaping/sanding, I then polished it as best I could. This material is very soft, so a glassy polish similar to that of harder ambers isn't possible. Borneo amber is essentially coeval in age with Sumatra amber, or at least its Formations (upper Gumai, Air Benakat, and lower Muara Enim), being Early to Middle Miocene in age. Like Sumatra amber, it is derived from a dipterocarp tree source, and is similar in color, clarity, and hardness. Both ambers also were deposited during periods of active volcanism, and indicators are easily seen in much material (esp. Sumatra amber): light-colored, opaque "swirls" are a common sight and are actually tiny suspended droplets of congealed resin, having formed in the presence of considerable heat. Direct and indirect effects of volcanism, such as reduced light due to ash clouds, caused great stress to the resin-producing trees, and enormous quantities of resin were produced: the largest single specimen of amber in the world was uncovered in Sarawak, and weighed 68 kilograms (~150 pounds).© Kaegen Lau
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Borneo Amber (Upper Nyalau Fm., 20.44-15.97 Ma)
Barrelcactusaddict posted a gallery image in Member Collections
From the album: Fossil Amber and Copal: Worldwide Localities
Borneo Amber Merit Block Coal Deposits Kapit Division, Sarawak State, Malaysia Upper Nyalau Formation 20.44-15.97 Ma Weight: 351.5 grams Dimensions: 123 x 86 x 45 millimeters The specimen arrived freshly cut from what was a larger, football-sized specimen; with a minor amount of shaping/sanding, I then polished it as best I could. This material is very soft, so a glassy polish similar to that of harder ambers isn't possible. Borneo amber is essentially coeval in age with Sumatra amber, or at least its Formations (upper Gumai, Air Benakat, and lower Muara Enim), being Early to Middle Miocene in age. Like Sumatra amber, it is derived from a dipterocarp tree source, and is similar in color, clarity, and hardness. Both ambers also were deposited during periods of active volcanism, and indicators are easily seen in much material (esp. Sumatra amber): light-colored, opaque "swirls" are a common sight and are actually tiny suspended droplets of congealed resin, having formed in the presence of considerable heat. Direct and indirect effects of volcanism, such as reduced light due to ash clouds, caused great stress to the resin-producing trees, and enormous quantities of resin were produced: the largest single specimen of amber in the world was uncovered in Sarawak, and weighed 68 kilograms (~150 pounds).© Kaegen Lau
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Borneo Amber (Upper Nyalau Fm., 20.44-15.97 Ma)
Barrelcactusaddict posted a gallery image in Member Collections
From the album: Fossil Amber and Copal: Worldwide Localities
Borneo Amber Merit Block Coal Deposits Kapit Division, Sarawak State, Malaysia Upper Nyalau Formation 20.44-15.97 Ma Weight: 351.5 grams Dimensions: 123 x 86 x 45 millimeters The specimen arrived freshly cut from what was a larger, football-sized specimen; with a minor amount of shaping/sanding, I then polished it as best I could. This material is very soft, so a glassy polish similar to that of harder ambers isn't possible. Borneo amber is essentially coeval in age with Sumatra amber, or at least its Formations (upper Gumai, Air Benakat, and lower Muara Enim), being Early to Middle Miocene in age. Like Sumatra amber, it is derived from a dipterocarp tree source, and is similar in color, clarity, and hardness. Both ambers also were deposited during periods of active volcanism, and indicators are easily seen in much material (esp. Sumatra amber): light-colored, opaque "swirls" are a common sight and are actually tiny suspended droplets of congealed resin, having formed in the presence of considerable heat. Direct and indirect effects of volcanism, such as reduced light due to ash clouds, caused great stress to the resin-producing trees, and enormous quantities of resin were produced: the largest single specimen of amber in the world was uncovered in Sarawak, and weighed 68 kilograms (~150 pounds).© Kaegen Lau
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Why are these denticles going in opposite directions? It’s got me baffled, but maybe it’s just ignorance.. any help is appreciated
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I arrived at the boat ramp early yesterday morning to find half the parking lot underwater from an abnormally high tide, plus heavy rains 2 days prior. I thought this might make collecting tough but I launched my kayak anyway and headed for the cliffs. I figured there would not be as much beach to collect on but I was not expecting water 2ft deep right up to the cliffs! Whenever I'd find a little spit of sand that I could actually walk on I would pull up my kayak and do some searching. I found a few small teeth this way. Later in the day as the tide started receding and I worked my way further down the cliffs I found a substantial beach that I could actually do some collecting on. I found lots of the usual teeth - tons of carcharinus, a lot of tigers/contortus, and some others. I peeked under a log and found the very rim of a cetacean vertebra buried in the sand, I uncovered it and it turned out to be a hefty specimen, about 4" wide by 2" thick. A little while later I found what was, at the time, the trip maker. It was the tiniest little megalodon tooth I've seen, about the size of a fingernail. Tiny but still, a meg is meg! Toward the end of the day I was working my way back to the kayak when I found a new trip maker. This little cow shark (upper?) tooth was the first complete one I have found and I was happy with it. I didn't want it to end up broken from jostling around with the other teeth in my pocket, so I quickly walked back to the kayak to put it away for safe keeping. As I was quickly walking back from the kayak to return to the spot I found it, I found another cow shark tooth freshly deposited in the surf by a wave. This one was much larger and also in perfect shape and I was so excited to find it. This one is definitely the best find of the day What started out looking like an impossible day turned out to be pretty good. I found 170+ teeth, some with very cool colors (like that cream colored tiger), and a few very nice teeth that I'm happy to add to my collection. Here are a few closeups of some of the nicer teeth, and the whole lot.
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- calvert cliffs
- cow shark
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Hi all. I was was hoping to get help with this one from the community. It was found in-stream near an outcropping of Pittsburg Bluff in Clatsop County, Oregon, and downstream of some Astoria Formation, both marine sediments. I have found mollusks and arthropods in the same collecting area, usually in very hard concretions. To my knowledge no marine vertebrate fossils have been found within the Pittsburg Bluff Group so if it is vertebrate I'm thinking it came down from the Astoria Formation southwest of the area. It looks and feels like bone, and is extremely porous (tongue sticks). Or it may just be a pseudofossil. Either way, thank you for the help.
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Went hunting Thursday. Found a couple of Megs, some small horse teeth, dermal denticles, barracuda teeth, and a bunch of small shark teeth *(Sand Tigers, Bull.Dusky, Hemis, Lemons). The only Horse tooth in decent shape is a lower right cheek tooth. Mostly, I find Nannippus, either aztecus or less frequently westoni. Here is a recent aztecus for comparison to this new find. The new tooth: @fossillarry
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- bonevalley
- florida
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Last Thursday, I was hunting the Peace River watershed with a friend. When we returned to his home (close to the Peace River), he pulled out 2 small teeth. One he had found during out hunt that day and the other a couple of months back. He asked me to identify them and leverage the TFF community if possible. To me , this was obvious. While I can not explain the size and I have no idea what the species is, horizontal "banding" on a canine shaped tooth means one ID and one ID only: Whale. I underline that statement because I want to be challenged if my assumption is incorrect. In the experience of TFF members, have they ever found a tooth, other than whale, that shows this telltale banding? Here is a marine mammal tooth I found 8 years ago in Horse Creek, a tributary of the Peace River. Horizontal banding and an enamel tip!! I know better than to ask for an ID below the level of "whale" on these teeth. As far as I can tell , no one has done a scientific study in the state of Florida on fossil whale material. I was fortunate, almost exactly a year ago to host a TFF member and fossil hunter to a couple of Florida fossil hunting trips. @JBMugu found some really nice Florida fossils but he gifted me something I valued much more. STH Whale teeth See the telltale banding close to the root? Maybe these small Peace River whale teeth are in the same family as Aulophyster. Maybe not... I would love to have Bobby comment on this, but I think he is busy with his day job. Next best thing is an old Bobby comment on the same topic of Small whale teeth. http://www.thefossilforum.com/index.php?/topic/95733-sharktooth-hill-teeth/ What I read from this is that Bobby thinks "small kogiid sperm whale" is an option!!!! Harry has a great picture_photo of Kogiopsis .sp Whale teeth, and I myself have found many at the 3-5 inch size. So, what is this thread about beyond small Florida whale teeth that can not be identified by anyone? There are numerous TFF members who hunt in Florida, hunt on the east coast of the US, find whale teeth while hunting worldwide. Please attach photos of any whale teeth under the length of 50 mm and around a diameter of 10 mm. I am trolling for whale teeth that look like these, and the names of whales like Aulophyster who had small teeth. Thanks for any contributions , Jack
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- miocene
- peaceriver
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Question on the age of the Carcharocles (Otodus) megalodon fossils from Punta Médanos locality, Argentina
Joseph Fossil posted a topic in Questions & Answers
Recently I found a really interesting article rom 2021 describing fossilized specimens (in the form of teeth) of the giant shark Carcharocles (Otodus) megalodon from Buenos Aires Province, Argentina. Here is the article: De Pasqua, J., Agnolin, F., Rolando, A. M., Bogan, S., & Gambetta, D. (2021). First occurrence of the giant shark Carcharocles Megalodon (Agassiz, 1843) (Lamniformes; Otodontidae) at Buenos Aires Province, Argentina. Revista Brasileira De Paleontologia, 24(2), 141–148. https://doi.org/10.4072/rbp.2021.2.05 https://www.researchgate.net/publication/354201776_First_occurrence_of_the_giant_shark_Carcharocles_megalodon_Agassiz_1843_Lamniformes_Otodontidae_at_Buenos_Aires_Province_Argentina What really actually baffled me was the age the scientists who authored the paper assigned to the specimens. The specimen MMDA-1 was found close to the Atlantic coast in sedimentary deposits consisting of five depositional sequences (DS) dating between the Miocene and early Pleistocene eras. The authors state its possible the specimen came from DS5 or DS4, which date between the late Pilocene-early Pleistocene eras. If this is correct, this would make this incredible find even more incredible as it would represent the youngest known Carcharocles (Otodus) megaldon fossils (and no, I'm definitely not counting the HMS Challenger specimens as it's pretty much been confirmed those specimens are much much older than several thousand years old). Also, this is not potential proof C. megalodon survived into the Holocene! Though, I'm am a bit skeptical about the age give it was found in a pretty loose sedimentary deposit by the coast! What do you guys think? Do you think specimen MMDA-1 could be from the late Pilocene-early Pleistocene or do you think it could be older?- 3 replies
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- argentina
- carcharocles megalodon
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Hi guys I have got this dolphin tooth (miocene to pleistocene) from cadzand, it has a small almost cusp like thing on it thanks for your help
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I'm new to fossil collecting and currently obsessed with shark teeth. I live near the Calvert Cliffs in Maryland, USA, and have been on several trips there and a couple trips to nearby locations in Maryland. In total I have been fossil collecting a total of 5 or 6 times since the beginning of October. I've found several hundred sharks teeth and have a great time each trip. I wanted to share a few of my best finds over the past couple weeks, beginning with... My first meg! I believe technically it is a chubitensis, but a megatooth nonetheless. I found this one on just my 3rd trip, and I could not believe my eyes when I saw it just laying there in ~1ft of water. I feel like it may have spoiled future collecting trips just a little - but not really, now I just want to find a bigger one Later that very same trip I found.... my second meg! This one was a little posterior tooth with tip damage. I thought it was a mako at first glance until I noticed the serrations. 2 megs in one trip is going to be hard to beat. These are some of the nicer mako teeth I have found, the first picture shows a tooth that I found on my very first trip. It solidified shark tooth hunting as a new obsession for me. The other 4 I found yesterday, with a few in-situ photos. They have such nice coloration. I have never seen a tooth from this area with an ivory color - I think it was sun-bleached sitting up at the high tide line? That's my best guess at least. I also found this nearly complete cetacean vertebra yesterday, which might be the find of the day: Here are a couple in-situ sand tiger teeth, one has double cusps which I thought was very cool, a first for me. Lastly, here are a couple whole-trip hauls, in reverse chronological order starting with my trip yesterday and ending with the first trip I took in early October, the trip that started it all! Thanks for reading, I look forward to posting more reports in the future.
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- calvert cliffs
- maryland
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I've had this tooth for a little while and would like to confirm with the resident horse experts @Harry Pristis @Shellseeker if it is an Archaeohippus tooth. It is from Dixie County, FL and measures 9.5 x 12.3 x 14.3mm. Thanks!
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- archaeohippus
- florida
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Recent trips. Weather has been warm, so the water is still warm. Hitting my usual spots, doing well on cowshark teeth (happy! thought the 4th was a broken one but the two pieces don't match up) and finally found a decent, nice (almost 2") mako (been a while). Bunch of non-descript gray shark teeth, skate teeth; fewer angel shark and drum teeth than usual. Peculiar tiger shark(?) tooth; not flat like usual, big almost L-shaped root with a bump/boss at middle (not as pronounced as those bumps/bosses om big sand tiger teeth.
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Need help identifying these teeth. Some look so similar and I can’t be sure which shark they’re from. I am an armature enthusiast! thanks in advance! You guys are great!
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Hello! Help please to identify two fossils. Middle Miocene, Badenian. Western Ukraine. 1. Size ~ 8 mm. Bryozoan? 2. Size ~ 5 mm. I have no idea what it is. Thanks in advance!
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Miocene era deposit, east coast south island New Zealand. Ribs of some kind - dolphin?
inyenzi posted a topic in Fossil ID
Hello, I found this bone cluster in a Miocene era beach deposit on the east coast of the South Island New Zealand. Appears to be ribs of some kind, 5 in total. Perhaps some sort of dolphin? Any help identifying the type of animal this came from would be much appreciated. Scale is in inches. Thanks!
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Today I did some pics of a huge piece of rock from the famous (today closed, forbidden to dig...) basalt-pit Weitendorf near Graz in Austria. It was miocene vulcanism covering sweetwater-sediments containing lot of snails, shells, rarely crabs and other fossils. Some of the snails are preserved with color patterns, but it is rare. So, when I did the pics and worked on them last hour I found two of them. One is Natica tigrina millepunctata, I think this gots the name "millepunctata" due to the lots of dots Size is approx. 2 cm, small one, but perfect!
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From what I’ve seen on FF this looks peccary. Many people have told me it’s not. IMG_1031.MOV
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Lucky to have lightening strike twice on the Potomac… 4.25/5.25
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Hello, I have found this small mammal tooth when I was looking for some shark teeth (in the same layer). It looks like a little jewel Could you please help me with the identification? Location: southern middle Slovakia, age: badenian. Scale is in mm. Thank you in advance.
