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Showing results for tags 'algae'.
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Re-Os Dates Indicate that Photosynthesis Started about 1.25 Ga
Oxytropidoceras posted a topic in Fossil News
World’s oldest algae fossils date back 1 billion years, says new research, Intelligencer, December 24, 2017 https://www.mcgill.ca/channels/channels/news/origins-photosynthesis-plants-dated-125-billion-years-ago-283492 https://www.lintelligencer.com/worlds-oldest-algae-fossils-date-back-1-billion-years-says-new-research-419-2017/ First photosynthesis took place 1.25 billion years ago: Study Economic times, Dec 24, 2017 https://economictimes.indiatimes.com/news/science/first-photosynthesis-took-place-1-25-billion-years-ago-study/articleshow/62231708.cms The paper is; Gibson, T.M., Shih, P.M., Cumming, V.M., Fischer, W.W., Crockford, P.W., Hodgskiss, M.S., Wörndle, S., Creaser, R.A., Rainbird, R.H., Skulski, T.M. and Halverson, G.P., 2017. Precise age of Bangiomorpha pubescens dates the origin of eukaryotic photosynthesis. Geology. https://pubs.geoscienceworld.org/gsa/geology/article-abstract/524864/Precise-age-of-Bangiomorpha-pubescens-dates-the Yours, Paul H. -
Hello, I want to put together some pics of some of the reef material that I have found in Streetsville, Mississauga, Ontario on the banks of the Credit River. It is now winter and I am missing the warm days in which I can go and wade in the warm waters of the river for fun. I just want to compile and share some specimens that whose photos I have not shared with. All the fossils belong to the Georgian Bay formation, Upper Member, which is late Ordovician in age. First is the common coral that displays an enormity of growth forms, Favistella alveolata (Goldfuss, 1826).
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A rangeomorph holdfast trace fossil from the Ediacara formation, Rawnsley quartzite of the Flinders Range, South Australia. This specimen is Medusina mawsoni, so called because it was until recently thought to be a jellyfish, but is now believed to be the attachment point of a fractal rangeomorph as Charniodiscus is the point of anchorage for Charnia sp. This one may have been the holdfast point for some species of Rangea. The diameter of the outer circle is 1.5 cm and the fossil is estimated to be 555 million years old.
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Hi guys i have this rock in my collection. I don't remember where or when i pick it up. Any idea of what it is? Kay
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I found this walking, stuck in a dirt road right next to the Birch River in Nicholas County West Virginia. Just curious what others think it could be. I thought maybe it was just a strange mineral deposit. Sorry about the wonky tags for this post. This requirement is way beyond my knowledge in the area of fossils - which is nothing.
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Found this in a creek bed behind my house. It's a piece of shale I found about 6-8 inches deep in sediment. It was about to open up on its own so I sprayed some water into it with the garden hose and it popped right open. That's when I noticed the black spot towards the center of it. I didn't think anything of it until I wiped it off and noticed what looked like fibrous ends jutting off along the edges. I know it's possible to find plant material in the area but I didn't notice any obvious stems. That's when I thought it could be an algae of some sort. It practically disappears when dry so I have to wet it to take photographs of it. I don't want to keep messing with it since it seems very fragile. If it is in fact algae, I figured the darker area towards the bottom and center would be more of the "matted" area, while the fibrous sprouts would be the edges. If it wasn't for the perfect symmetry, it's in shale, and the fibrous ends I wouldn't have given it a second look. It's nothing spectacular but it would definitely be a very unexpected find if it turns out to be plant material. It is 5cm tall at it's longest and 3cm at its widest. There is some more randomly placed black areas and what appears to be more fibrous ends. Some of it totally disappears when its dry. I was hoping someone here could either confirm or deny if it is algae or at least plant material. I live in the Waynesville/Anheim Formation if that helps. Thanks! P.S. It was very hard to get decent images of the specimen since it is practically only visible while wet which caused glare. The fibers are very, very small. Some of the images are at 250x magnification. Because of this, some debris may be visible in the images.
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Side Views of the Prismostylus sp. Specimen
JUAN EMMANUEL posted a gallery image in Member Collections
From the album: Credit River Fossils from Streetsville, Ontario (Georgian Bay Formation, Upper Member)
Side view of the Prismostylus sp. specimen. Credit River near the Streetsville area, Mississauga, Ontario. Georgian Bay Formation, Streetsville Member. Late Ordovician. -
From the album: Credit River Fossils from Streetsville, Ontario (Georgian Bay Formation, Upper Member)
Prismostylus sp. found near Streetsville, Missisauga, Ontario by the banks of the Credit River. Top view of specimen. Georgian Bay Formation, Streetsville Member, late Ordovician, Katian. Formerly called Tetradium, this algae was very common to find in the locality I found this in. Small fragments of this algae can be observed on the limestone but I have seen some specimens that are wider than 20-25 cm in diameter. This specimen is a fragment and is around 15 cm at its widest point. -
Hello all, this was sold to me as a chunk of precambrian algae from a reputable dealer. However, I'm having trouble finding photos of anything similar. Is that what it really is, and if so, is there any way to know roughly what kind it is and how old it is? The precambrian era is a pretty big block of time... The largest face of the fossil has bands of hollowed-out "combs" spaced about an inch or so apart. From the other sides, top, and bottom, it's clear that these bands go all the way through the fossil in three dimensions. There are some combs between the banding, but the large number of them in the bands is distinctive.
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Hi, interested to hear some thoughts on this fossil found in Chicago. It was chiseled out of a large boulder containing Silurian reef material; rugose corals, gastropods, bryozoans, crinoids, etc... I'm guessing it is a form of stromapotoroids, but I'm not sure. Any ideas? Measures 2.5"
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Leveillites hartnageli or Leveilleites hartnageli, both names can be found in the literature (in the more recent literature Leveilleites is used). References: Tinn, O. et al. (2009): Thallophytic algal flora from a new Silurian Lagerstätte. Estonian Journal of Earth Sciences, 2009, 58, 1, 3842 Viirika Mastik and Oive Tinn (2015): New dasycladalean algal species from the Kalana Lagerstätte (Silurian, Estonia) Journal of Paleontology 89(02):1-7. Viirika Mastik and Oive Tinn (2017): Leveilleites hartnageli Foerste 1923 (Rhodophyta?) from the Ordovician and Silurian of Laurentia and Baltica: redescription and designation of a neotype. Palaeoworld 26(4).
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References: Tinn, O. et al. (2009): Thallophytic algal flora from a new Silurian Lagersttte. Estonian Journal of Earth Sciences, 2009, 58, 1, 3842 Viirika Mastik and Oive Tinn (2015): New dasycladalean algal species from the Kalana Lagerstätte (Silurian, Estonia) Journal of Paleontology 89(02):1-7
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Harlaniella is considered either as early algae or as sulfide reducing bacteria. References: Ivantsov, A. Yu. (2013): New data on Late Vendian problematic fossils from the genus Harlaniella. Stratigraphy and Geological Correlation, Volume 21, Issue 6, pp 592–600
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What can you men tell me about my rock I found around Aspen Colorado. Thanks beauties. What r these shells etc? The second one is the reverse
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My husband and I collected this piece of Tully limestone (Devonian) last summer for the brachiopods (on the other side). Last month, he was sitting near the shelf where we have the day's collection, and decided to take a closer look at a few things while he was waiting around. He looked at the depression in this rock: and noticed an interesting texture that wasn't visible in the field: I've looked at it under magnification, and it reminds me of a modern ground pine. Considering that the other fossils in the rock are marine brachiopods, it seems more likely to me that this is either an algae or part of a crinoid head. Here are a few micrographs. Notice that the "arms" branch in the first image: The depression is 1 1/2 inches long (4 cm).
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Hi, I collect rocks for fun and relaxation. I have a few that I would love to get opinions on. I contacted a very nice man at University and he said it looked to be fossilized algae. He also gave me the address to this website so I could learn more about fossils. I can use all the help I can get and look forward to your comments.
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A friend found out about my hobby of fossiking (particularly urchins) and says "oh, there are hundreds of the round urchins on my property, come on out!" So, I did and was initially disappointed to find out that what he thought were round urchins, were in fact algal fruiting bodies or porocystis globularis (as I discovered a while back when I first found the fossil forum, thinking I had some cool eggs....) So finding literally hundreds of these globularis was quite cool, but I wanted urchins! Now, also, there were urchins. Lots and lots and lots...of heart urchins. Which I like. A lot. But I also find them quite frequently where I am. I was wanting ROUND urchins! I havn't found but a few of those in my huntings. So I kept hunting. And was rewarded with a few small but nice phymosoma texanum round urchins. Yay!! And a mess of nice gastopods and bivlaves (some really adorable, yes, adorable, small deer heart clams) .All in all, a good days hunt!
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Hey guys. This was found in the Helderberg group, upstate ny. It is late Silurian to middle Devonian. Any ideas? Thanks
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From the album: Texas Fossils
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From the album: Ord. Red algae and stromatoporoid
from Winchester, KY -
From the album: Ord. Red algae and stromatoporoid
From Frankfort, KY -
From the album: Ord. Red algae and stromatoporoid
Found in Winchester, KY. -
I'm new to the site and am finally engaging my childhood fascination with fossils with a little hunting. I found these in the Oregon Buttes area of Wyoming. I think it's some kind of algae, but I'm unsure. The area is known to have been a shallow sea area. In the area there is a lot petrified wood and fossil coral. I have other pieces of the stuff. It might just be a kind of mineral that I am unfamiliar with. Learning as I go. Any thoughts?
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For nearly twenty years, I've collected some strange fossils from a unique Pennsylvanian deposit in northeast Kansas. I've been pondering them to this day, and I'm still drawing a blank. I first found this slab: The bold segments caught my eye. I then noticed that they have a branching habit. I assumed they were sponges, but then I found this: This one is also segmented and bifurcated, but it forms a nearly continuous surface. Perplexed, I looked at them up close. They seem to form thin (0.5 mm), leaf-like sheets (i.e. thalli). I nicknamed these 'pahoeids', because they resemble pahoehoe lava flows. Some appear to be featureless sheets. This one, with an attached Coelocladia sponge, was fractured. This may give a clue to its original consistency: Here, the tips of some 'pahoeids' seem to be present: (For scale, the squares on the couch cushion are 18 mm across. I took the photo after I found the rock back in October.) Here's the same piece from the side: This chunk demonstrates how the 'pahoeids' bind the sediment. They are so abundant, they actually form beds and lenses of limestone within a shaly matrix. The few 'pahoeids' I've found in situ were on the undersides of slabs. The top surfaces of the organisms are never cleanly exposed; they are always locked in matrix. Also, encrusting bryozoans and brachiopods are often attached to the surface. All of this tells me the 'pahoeid' thalli were once suspended above the substrate. Some more specimens.... Here's another bifurcated sheet: And another: These seem to be 'juveniles': These form long, parallel branches: This limestone nodule contains what are possibly undeformed 'pahoeid' thalli: Note how the orangish sediment seems to 'fill' the little 'cups'. An underlying limestone bed seems to contain fragmented 'pahoeids' as well as several Amblysiphonella sponges: As to the nature of 'pahoeids', the only thing I can think of is some form of red algae, perhaps similar to present-day Mesophyllum or Peyssonnelia. It's possible they could be something akin to the Pennsylvanian Archaeolithophyllum. So far, I've been unable to discern any fine internal structure. If they indeed are phylloid algae, this will be the only example I know of where they are preserved in shale, let alone left with readily observable morphology. For the sake of this post, I'm lumping all these thalli forms together as 'pahoeids'. They very well may represent a number of different organisms. Here's a stratigraphic chart based on my sketches and observations in the field: Going by the lithology, I've guessed that the 'pahoeids' lie in the Frisbie Limestone (which is, stratigraphically, a transgressive limestone). As far as I know, the beds could, instead, belong to the upper Liberty Memorial Shale. The 'pahoeid' beds are a complex bundle of shale and impure limestone beds and lenses. At the top, there is limestone made up of fine fossil debris. There is pyrite and glauconite present througout the unit. Below the Frisbie is the Liberty Memorial Formation, which is a typical shallow marine/non-marine shale. It is medium gray, sandy, and contains thin beds of sandstone in places. Trace fossils, including Conostichus, are present. Above the 'pahoeid' beds is the Quindaro, a deeper-water shale. Fossils include profusely abundant sponges (Heliospongia ramosa, Maeandrostia, and especially Fissispongia), as well as some small crinoids, bryozoans, and brachiopods. The thick limestone above the Quindaro appears to be typical Argentine (which is regressive, for those taking notes ), but the strata in the area are anything but routine. These sponge-'pahoeid' deposits are near the edge of a large algal reef build-up in the Wyandotte Formation. Less than a half mile away in either direction, fossils at this horizon are sparse to absent.
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