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Showing results for tags 'Maastrichtian'.
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From the album: Campanian/Maastrichtian echinoids from SE Pyrenees
Hemiaster (bolbaster) batalleri (Lambert, 1933)-
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From the album: Campanian/Maastrichtian echinoids from SE Pyrenees
Hemiaster (bolbaster) batalleri (Lambert, 1933)-
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Plans for the 3rd Møns Klint Fossil Excavation
The Amateur Paleontologist posted a topic in Fossil Hunting Trips
Nowadays, I'm mostly focused on preparing for my high school finals. But in my free time... Well I started to plan the 3rd Møns Klint Fossil Excavation (MKFE), as part of the larger Møns Klint Fossil Research Program. This field session has been planned for mid-August, and will last about 2 weeks - needless to say, I'm pretty excited Especially when considering the success of the 2nd MKFE... Collection policy will remain mostly the same as last time, meaning that arthropod, cephalopod, echinoderm and vertebrate material will be the priority. Of course, there will be a slight change; with more focus on articulated/associated remains (because single, eroded fragments are becoming a bit too numerous...). Also, last year, when I was collecting anything significant (e.g. articulated echinoderm remains), I forgot to try and find associated zone fossils. This time, I'll remember to collect zone fossils (brachiopods and belemnites), as they can be pretty useful for determining more precisely the age of a specimen. Of course, I'll use this field trip as an opportunity to donate to the GeoCenter museum some of the fossils from the 2nd MKFE. Can't wait to go back there!! -Christian
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Only large bodied Ceratopsian have been described from the Hell Creek/Lance Formations like Triceratops and Torosaurus. Small bodied Ceratopsians do exist and isolated material similar to Leptoceratops gracilis is found. I believe the type specimen was discovered in Alberta part of the Scollard Formation which is Maastrichtian in age. Most of these finds are is in the form of isolated teeth however post-cranial material and skull elements are scarce but found. Dealers/auction sellers and collectors have a good understanding of what these teeth look like and the teeth are very distinctive from large bodied Ceratopsians with just a single root. Skull Elements: Isolated Teeth: Post-Cranial Elements
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All about my 2nd MKFE :)
The Amateur Paleontologist posted a topic in Partners in Paleontology - Member Contributions to Science
Hey everyone, I'm back from my second Møns Klint Fossil Excavation - it was absolutely fantastic! For the majority of 2 weeks, I was down at the chalk cliffs of Møn; and recovered quite a sizable quantity of (mostly echinoderm) good-quality fossil material. All of it is still safely stowed away in ice cream boxes and kitchen paper "field jackets", but I can not wait to getting down to preparing all those fossils. Unfortunately, I did not manage to rediscover the "Echinoderm Quarry", but I did on the other hand have the chance to work on some new, very fossiliferous sites. Along with extensive fieldwork, I also got the privilege of analysing the MK Thoracosaurine jaw fossil, and meeting the Director and the Fossil Guide of the GeoCenter Møns Klint. I'll give detailed and illustrated accounts of all that happened* during this successful field session in the next few days... Stay tuned *Except, of course, for my studies of the MK Thoracosaurine - that'll have to wait until after the paper has been published (IF it does end up being published)- 27 replies
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ENCI quarry (type Maastrichtian, The Netherlands) fossil hunting trip
Johan posted a topic in Fossil Hunting Trips
Hello everyone, Last Saturday, October 6th, I joint a fossil hunting excursion of the Dutch geological society (NGV) to the ENCI quarry, near the town of Maastricht (The Netherlands). This quarry has been in production since 1926, and has been one of the best fossil hunting sites of the Netherlands ever since. Worldwide, the youngest time interval of the Cretaceous Period is known as the Maastrichtian, a reference to the rock layers exposed in this area. We owe this international reference to the instrumental work of Belgian geologist André Hubert Dumont, who, in 1849, first described the rock layers in the valley of the Meuse River, close to the present-day ENCI quarry. Consequently, the rock sequence in the ENCI quarry constitutes the original type-locality of the Maastrichtian Stage. The Maastrichtian rocks are also world famous for their excavated mosasaur skeletons (the word 'mosa' is latin for the river Meuse. Mosasaurs are also named after this locality). Yet, unfortunately, all good things come to an end: the ENCI quarry is closing down. The production has stopped this month, and the quarry is now turned into a nature conservation area. Most of the quarry walls are currently being covered up, to make 'nice' gently slopes. Burying all remaining fossils forever.... So the remaining few excursions this year are the very last opportunity to hunt some fossils in this once glorious pit. I have been there a couple of times this year, and every trip fills me with melancholy. While the hunting is still relatively okay(ish), the possibilities become fewer and fewer, and only a very small part of the total strata can be examined....
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From the album: Campanian/Maastrichtian echinoids from SE Pyrenees
Close-up view of the four gonopores -
From the album: Campanian/Maastrichtian echinoids from SE Pyrenees
Peristome D-shaped with the opening facing forward; with narrow rim. Labrum slifhtly projecting -
From the album: Campanian/Maastrichtian echinoids from SE Pyrenees
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From the album: Campanian/Maastrichtian echinoids from SE Pyrenees
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From the album: Campanian/Maastrichtian echinoids from SE Pyrenees
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Hi everyone. I would expose a paleontological ID question that intrigues me. Let me do it in a storytelling style. Prologue Last November I found this beautiful bug in a limestone Upper Campanian /Lower Maastrichtian strata in the SE of Pyrenees, Catalonia (Spain). So, I start a little detective process... which turned not to be so little. This cidaroid specimen is almost complete, retaining even its plates, which is rather rare. In fact, its plates are of most importance in this story. Chapter 1 In 1933 French paleontologist Jules Lambert found some cidaroid specimens in the Pyrenees, in a place not far from I live, called Falgars (a Holy Mary sanctuary surrounded by meadows and woods, a very nice place). He described the species as Typocidaris falgarsensis, designing a holotype. He donated –among others- the holotype to the Museu Geologic del Seminari de Barcelona (Seminary’s –catholic- of Barcelona Geological Museum). But during the turmoil of revolutionary events of Spanish Civil War the Seminary’s was sacked in 1936 and the holotype was lost. In 1997 paleontologist J.J.Carrasco did a revision of the species and fixed a neotype, a specimen found some 4 km west of Falgars, in strata continuity, near the little village of Sant Julià de Cerdanyola. He reclassified it as Temnocidaris (Stereocidaris) falgarsensis (Lambert 1933). He did it in this paper (in Spanish) (The exact site where the original holotype was found is now forgotten) Sant Julià de Cerdanyola village I went to the MGSB museum, where director Dr. Calzada kindly allowed me to compare my specimen with the neotype, and as far as I know they are the same. ID solved? Not entirely In 1991 North-American paleontologists D.B.Blake and W.J.Zinsmeister described a new genus and new species of cidaroid echinoid from the Maastrichtian of Seymour Island, Antarctic Peninsula: Almucidaris durhami. As they said here The species is unique in that the plates of the female expanded and hollowed to form marsupia. Maybe not so unique, though, as during the last 90’s (I don’t know when exactly) some specimens of cidaroid echinoids forming marsupia were found around... Sant Julià de Cerdanyola. You can see them in this thread of the Spanish Foro Nautilus (my specimen is the last one, and was found some 15 km. west of Sant Julià, not far from the town of Berga. Note that it has no marsupia, so it is arguably male). Andrew B. Smith took the view that Pyrenean Upper Cretaceous cidaroids showing marsupia should be classed in the genus Almucidaris, as he stated in The Echinoid Directory. In fact A.B.Smith made for the first time this statement in: Smith, A.B. & Jeffery, C.H. 2000. Maastrichtian and Palaeocene echinoids: a key to world faunas. Special Papers in Palaentology 63, 1-406. Unfortunately, I have no access to this paper. I have sent some messages to TED, with no answer. Unsolved enigmas So, we Spanish amateur or professional paleontologists have assumed Andrew B. Smith’s view, calling our specimens Almucidaris falgarsensis. But some questions remain unresolved. a) If specimens with marsupia are females, what about the male ones (as mine)? The belonging of arguably male specimens of Temnocidaris (Stereocidaris) falgarsensis to the genus Almucidaris can’t be stated? This would lead to a very paradoxical situation, with females of one species belonging to a genus and male ones remaining in another (a bizarre sort of sexual discrimination ). b- Are Almucidaris durhami and Almucidaris falgarsensis the same species or only belong to the same genus? c) Have been found specimens in other places, apart from Antarctica and Pyrenees, of cidaroid echinoids having developed large brood chambers in the plates? I highly appreciate any information and suggestions, and I hope I have not bored you.
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Hey everyone I ordered this piece last night, it will probably arrive in the course of this week. According to the listing it is a turtle bone from the cretaceous phosphate layers of Oued Zem in Morocco, but the exact species wasn't identified. But unfortunatly I am not very familiar with Cretaceous sea turles from Morocco, I just found it a nice piece to add to my Oued Zem display. So does anyone know which turtle species can be found in the cretaceous phosphate layers of Oued Zem? The only species that came out while googling was Lytoloma elegans, but I am sure some of you might know other species that lived in Oued Zem during the Cretaceous? Thanks in advance!
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Maastrichtian birth of the Ancestral Mississippi River system
Oxytropidoceras posted a topic in Fossil News
Geology: Tiny zircon crystals help trace the birth of the mighty Mississippi By Dale Gnidovec, The Columbus Dispatch, Nov 11, 2018 https://www.dispatch.com/news/20181111/geology-tiny-zircon-crystals-help-trace-birth-of-mighty-mississippi Potter-McIntyre, S.L., Breeden, J.R. and Malone, D.H., 2018. A Maastrichtian birth of the Ancestral Mississippi River system: Evidence from the U-Pb detrital zircon geochronology of the McNairy Sandstone, Illinois, USA. Cretaceous Research. Volume 91, November 2018, Pages 71-79 https://www.sciencedirect.com/science/article/pii/S0195667117305414 Yours, Paul H.-
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New genus and new species first described by Dr. Sebastian Calzada Badia in: C a l z a d a , S., 1974. Almerarhynchia n. gen. virgiliana n. sp. del Maastrichtiense de Figols, Prepireneo catalan. Acta Geológica Hispanica, 9 (3): 92-97. http://digital.csic.es/handle/10261/7365. ID of the specimen confirmed by Dr. Calzada.
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New update from the Cretaceous of Romania :)
The Amateur Paleontologist posted a topic in General Fossil Discussion
Hey everyone - hope you're all well Wanted to share this (in part cause I'm half Romanian ).. It's a conference poster presenting some recent research findings regarding a productive vertebrate microsite from the Maastrichtian (Late Cretaceous) of Hatzeg Basin (Romania). It reports some new micro-vertebrate material, including crocodile teeth, lil' bones and even eggshell. Voicu, Vasile & Csiki-Sava (2018). The Cretaceous Swamp just gets bigger: new data on the faunal composition of the Pui Swamp microvertebrate bonebed, Maastrichtian of the Haţeg Basin. The Tenth International Zoological Congress of “Grigore Antipa” Museum, 21-24 November 2018, Bucharest, Romania Here's a link to the poster from where you can download a pdf of it : Voicu et al. 2018 Hatzeg poster -Christian
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From the album: Dinosaurs and Reptiles
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A partial neural arch of a cervical vertebra of an Edmontosaurus.
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Zarafasaura Oceanis elasmosaurus sacral(?) vertabrae
Still_human posted a gallery image in Member Collections
From the album: Marine reptiles and mammals
Zarafasaura Oceanis Elasmosaurus sacral(?) vertebrae. -
Today we went on a fieldtrip with the BVP ( https://paleontologie.be/ ) our local geology club to the quarry of Eben Emaal in Belgium, just across the border with Maastricht in the Netherlands. Here we can prospect Maastrichtian marine deposits. The fossils that were collected were; Belemnites, oysters, pecten, echinoids and a few shark teeth. there was evan a lucky one who found a mosasaur tooth. personally I did find 4 big echinoids ( hemipneustes striatoradiatus )and a few belemites, my girlfriend found 2 smaller echinoids ( catopygus ) and a few nice shark teeth.
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Here is a link to an entry of a post in the "fossil preparation" topic. I was hoping to get some opinions as to the ID of the mystery fragment cited; and reasoned this may be a more productive placement. Thanks for any help.
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I found this isolated fossil in a creek bed in the southeastern U.S. It is in "as found" condition. Found in the Ripley Formation (Maastrichtian). Does anyone know what it is?
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MKFRP: The Møns Klint Fossil Research Program
The Amateur Paleontologist posted a topic in Partners in Paleontology - Member Contributions to Science
Hello, and welcome to my new MKFRP thread! In this new thread, there are going to be a lot more details, accounts, and of course… pictures, than in the previous one. I hope you enjoy it here For those who don't remember (or who haven't heard of this), the MKFRP is a research project based on the extensive collection and research of fossil material from the Lower Maastrichtian (Late Cretaceous) of Møns Klint, Denmark. The project was put in place given that this fossil site is highly diverse (more than 120 macrofossil taxa), but has been given too little paleontological attention. The goal of the MKFRP is to promote greater understanding and knowledge of the paleontology of this fossil site. The fieldwork aspect of this project consists of "MKFE's" (Møns Klint Fossil Excavations), organised week/fortnight-long field trips of which the central goal is to collect a large quantity of fossil material (especially from cephalopods, echinoderms and vertebrates). The first MKFE was a success, in which many echinoderm fossils (and one shark tooth) had been collected. The second MKFE will last 2 weeks, and is scheduled for the 2nd and 3rd weeks of July.- 17 replies
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A bit of quantitative paleoecology
The Amateur Paleontologist posted a topic in General Fossil Discussion
Just got this new idea for a future MKFRP research avenue Basically, on the beach near the cliffs, there is this area filled with small bits of fossils washed out from the chalk (the so-called "washout zone"). I'll make a sampling of that area, with a few control variables included (i.e. sampling area, maximum sampling depth, fossil size class, quantity of fossils). The sampling will be done by scooping washout material with a bucket & spade, bringing it home and then picking out individual fossils. Based on the fossils collected, I'll then establish relative faunal abundances based on percentages of particular fossil groups. The results obtained from the data will hopefully help to further understanding of the paleoecology of Møns Klint. Similar research has been done on places like Stevns Klint or Rügen, so I'd be expecting similar results for Møns Klint. Small preliminary hypothesis: fish remains won't have reach an abundance higher than ~5% Closeup picture of the "washout material"; taken from Meyer (2015) - "Fossilerne fra Møns Klint"
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A few days ago, I started in another thread a gallery of fossils from Møns Klint held at the "on-site museum" GeoCenter MK. I thought that it would be more appropriate to continue this gallery in the "A Trip to the Museum" forum. This post will deal with a multitude of fossils that are more common than the exceptional Danekrae fossils (but you'll see that some of them are rather rare). All the fossils pictured here are exhibited at "The Fossil Room". Hope you like them! 2 partial stems of the crinoid Isselicrinus sp. preserved in a single piece of chalk - uncommon 2 nodules of flint that preserve associated and articulated ossicles of the goniasterid asteroid (starfish) Recurvaster sp. - relatively rare Partial mandibular rami from a thoracosaurine crocodylian - unique; no other crocodylian remains have been found at MK (temporarily removed from display to facilitate my research of the specimen in summer) Calyces from 3 Bourgueticrinus constrictus crinoids - relatively common 2 teeth from a Cretalamna appendiculata shark - rare Complete tooth from a Hexanchus microdon shark - rare Articulated and associated ossicles from the goniasterid asteroid Metopaster poulseni (includes at least one arm) - rare Temnocidaris pistillum (cidarid echinoid) spines - relatively common Phymosoma granulosum (phymosomatid echinoid) spines - relatively common Complete Phymosoma granulosum test (echinoid "shell" composed of numerous ossicles) - relatively rare Partial Baculites vertebralis (baculitid heteromorph ammonite) shell - rare Sphenodiscus sp.; almost complete ammonite shell - rare Rather long stem of the crinoid Isselicrinus buchii - relatively rare Well, that was the MK fossil gallery! Tell me what you think about it Best, Christian
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