Search the Community
Showing results for tags 'microfossils'.
-
From the album: Hell Creek Formation Microsite
Mammals are always a joy to find - a rooted marsupial lower premolar.-
- cretaceous mammal
- hell creek
- (and 6 more)
-
Online discussion about how to "liberate" microfossils from undissolved sediment residue
Oxytropidoceras posted a topic in Micro-paleontology
I was surfing through the web looking for some information and an interesting online discussion involving professional paleontologists about how process and / or disaggregate sediments for the concentration of microfossils for paleontological study. This discussion is online and open for anyone to read on Researchgate. It is: How can I "liberate" microfossils of undissolved sediment residue? Aleš Šoster, University of Ljubljana, August 25, 2015 What I discovered is that some paleontologists use liquid nitrogen to extract fossils Remin, Z., Dubicka, Z., Kozłowska, A. and Kuchta, B., 2012. A new method of rock disintegration and foraminiferal extraction with the use of liquid nitrogen [LN2]. Do conventional methods lead to biased paleoecological and paleoenviromental interpretations?. Marine Micropaleontology, 86, pp.11-14. Yours, Paul H.- 1 reply
-
- 6
-
- concentration
- disaggregate
-
(and 3 more)
Tagged with:
-
From the album: Hell Creek Formation Microsite
An enigmatic tooth taxon prevalent throughout the Late Cretaceous. Unfortunately, that means not much is known about the animal that wielded these blade-like chompers. Historically, these have been considered theropod dinosaurs.-
- hell creek
- hell creek formation
- (and 4 more)
-
From the album: Hell Creek Formation Microsite
A collection of microscopic (~ 1 mm in size) teeth from the orectolobiform, Galagadon. These are very difficult to collect, as it requires sieving a large volume of sediment and searching the concentrate under a microscope.-
- galagadon
- galagadon nordquistae
- (and 7 more)
-
From the album: Hell Creek Formation Microsite
A rooted tooth from a juvenile Leptoceratops, a smaller cousin of Triceratops.-
- ceratopsian
- hell creek
- (and 6 more)
-
From the album: Hell Creek Formation Microsite
A fragment of a frog jaw, with telltale bumps on the labial surface. -
From the album: Hell Creek Formation Microsite
Salamander jaw fragments. (A) premaxilla; (B) dentary fragments (Scapherpeton?); (C) jaw fragment with intact teeth (Habrosaurus?).- 2 comments
-
- 1
-
- habrosaurus
- hell creek
- (and 6 more)
-
From the album: Hell Creek Formation Microsite
Mussel shell fragments litter the matrix, so much so that even in the finest grain size it looks to have been laced with glitter. The original shell material that makes them appear iridescent (nacre) is preserved, which makes it somewhat surreal to sort through - as if this dirt was shoveled from a river yesterday. The colors are more vibrant when they’re damp. Unfortunately they are extremely fragile and crumble if you so much as look at them.-
- hell creek
- hell creek formation
- (and 3 more)
-
From the album: Hell Creek Formation Microsite
Illustration of pre-fossilization channel weathering effects: physical and chemical. River action physically tumbles and erodes details and sharp features, the acidity of the water may chemically erode surfaces, causing pitting. A) Trionychid turtle shell; B) holostean fish (Cyclurus) maxilla.-
- hell creek
- hell creek formation
- (and 3 more)
-
From the album: Hell Creek Formation Microsite
Under the microscope, one may find these tiny treasures - microscopic shark teeth! They are uncommon and require a lot of effort to find.-
- 1
-
- hell creek
- hell creek formation
- (and 3 more)
-
From the album: Hell Creek Formation Microsite
Some bones are so river tumbled that they become rounded, even to a near-polish in some cases, and are referred to as “bone pebbles” in the literature.-
- hell creek
- hell creek formation
- (and 3 more)
-
From the album: Hell Creek Formation Microsite
The vast majority of what I find looks like this - chunks of bone and fish bits. In leaving “no stone unturned”, I’ve picked out thousands of pieces of this stuff just to recover a handful of exquisite specimens.-
- hell creek
- hell creek formation
- (and 3 more)
-
From the album: Hell Creek Formation Microsite
Typical Champsosaurus teeth, highlighting distinguishing features. These are commonly confused for gar fish teeth, and similarly Melvius teeth are often confused for Champsosaurus.-
- champsosaurus
- champsosaurus teeth
- (and 4 more)
-
From the album: Hell Creek Formation Microsite
A representative sampling of the diversity captured in microsites - everything from Tyrannosaurus to mollusks.- 6 comments
-
- 13
-
- dinosaur
- edmontosaurus
- (and 11 more)
-
Photosynthesis Evolved as Early as 1.75 Billion Years Ago, Microfossils Suggest
Oxytropidoceras posted a topic in Fossil News
1.75-Billion-Year-Old Fossils Are Oldest Record of Oxygenic Photosynthesis The preserved structures show a process that gave rise to life as we know it. By Isaac Schultz, GIZMODO, January 3, 2023 Photosynthesis Evolved as Early as 1.75 Billion Years Ago, Microfossils Suggest Jan 3, 2024 by Enrico de Lazaro. SciNews The paywalled paper is; Demoulin, C.F., Lara, Y.J., Lambion, A. et al. Oldest thylakoids in fossil cells directly evidence oxygenic photosynthesis. Nature (2024). Yours, Paul H. -
From the album: Hell Creek / Lance Formations
A pile of hundreds of small Myledaphus teeth, recovered from a channel deposit in Montana.-
- hell creek
- hell creek fm
- (and 4 more)
-
Hello again! I haven't posted in a while, but I've been keeping busy looking through microfossils and have found some cool things. The scalebar subdivisions are 1mm. Let me know what you think about this haul, and any other ideas on IDs. Miguel M Some fish jaws: (Anguiliform dentary?) (drum pharyngeal jaw) Some fish vertebrae and basioccipital Random fish teeth (maybe a scombriform?) (Some other fish teeth. Leftmost could be a sheepshead incisor, no idea as to the others) Elasmobranch teeth (skate teeth) (The one to the right looks very interesting)
-
Fossilied musculature of an early Cambrian cycloneuralian animal
Oxytropidoceras posted a topic in Fossil News
Early Cambrian microfossils preserve introvert musculature of cycloneuralians The open access paper is: Zhang, H., Xiao, S., Eriksson, M.E., Duan, B. and Maas, A., 2023. Musculature of an Early Cambrian cycloneuralian animal. Proceedings of the Royal Society B, 290(2008), p.20231803. Yours, Paul H. -
From the album: Hell Creek / Lance Formations
A small droplet of amber found within an organic-rich layer in laminated siltstone.-
- amber
- hell creek
- (and 3 more)
-
From the album: Hell Creek / Lance Formations
A mm-sized shark tooth recovered from a channel deposit.-
- galagadon
- galagadon nordquistae
- (and 4 more)
-
From the album: Hell Creek / Lance Formations
A mm-sized gastropod recovered from a channel deposit.-
- gastropod
- hell creek
- (and 3 more)
-
From the album: Aurora North Carolina Micro Matrix Fossils
-
Shark Cookie cutter Isistius sp Aurora NC Miocene
JamieLynn posted a gallery image in Member Collections
From the album: Aurora North Carolina Micro Matrix Fossils
-
- aurora
- cookie cutter
-
(and 4 more)
Tagged with:
-
Shark Scyliorhinus sp. cat shark Aurora NC Miocene
JamieLynn posted a gallery image in Member Collections
From the album: Aurora North Carolina Micro Matrix Fossils