Jump to content

Search the Community

Showing results for tags 'receptaculites'.

  • Search By Tags

    Type tags separated by commas.
    Tags should be keywords or key phrases. e.g. otodus, megalodon, shark tooth, miocene, bone valley formation, usa, florida.
  • Search By Author

Content Type


Forums

  • Fossil Discussion
    • Fossil ID
    • Fossil Hunting Trips
    • General Fossil Discussion
    • Partners in Paleontology - Member Contributions to Science
    • Fossil of the Month
    • Questions & Answers
    • Member Collections
    • A Trip to the Museum
    • Paleo Re-creations
    • Collecting Gear
    • Fossil Preparation
    • Is It Real? How to Recognize Fossil Fabrications
    • Member-to-Member Fossil Trades
    • Fossil News
  • Community News
    • Member Introductions
    • Member of the Month
    • Members' News & Diversions
  • General Category
    • Rocks & Minerals
    • Geology

Categories

  • Annelids
  • Arthropods
    • Crustaceans
    • Insects
    • Trilobites
    • Other Arthropods
  • Brachiopods
  • Cnidarians (Corals, Jellyfish, Conulariids )
    • Corals
    • Jellyfish, Conulariids, etc.
  • Echinoderms
    • Crinoids & Blastoids
    • Echinoids
    • Other Echinoderms
    • Starfish and Brittlestars
  • Forams
  • Graptolites
  • Molluscs
    • Bivalves
    • Cephalopods (Ammonites, Belemnites, Nautiloids)
    • Gastropods
    • Other Molluscs
  • Sponges
  • Bryozoans
  • Other Invertebrates
  • Ichnofossils
  • Plants
  • Chordata
    • Amphibians & Reptiles
    • Birds
    • Dinosaurs
    • Fishes
    • Mammals
    • Sharks & Rays
    • Other Chordates
  • *Pseudofossils ( Inorganic objects , markings, or impressions that resemble fossils.)

Blogs

  • Anson's Blog
  • Mudding Around
  • Nicholas' Blog
  • dinosaur50's Blog
  • Traviscounty's Blog
  • Seldom's Blog
  • tracer's tidbits
  • Sacredsin's Blog
  • fossilfacetheprospector's Blog
  • jax world
  • echinoman's Blog
  • Ammonoidea
  • Traviscounty's Blog
  • brsr0131's Blog
  • brsr0131's Blog
  • Adventures with a Paddle
  • Caveat emptor
  • -------
  • Fig Rocks' Blog
  • placoderms
  • mosasaurs
  • ozzyrules244's Blog
  • Terry Dactyll's Blog
  • Sir Knightia's Blog
  • MaHa's Blog
  • shakinchevy2008's Blog
  • Stratio's Blog
  • ROOKMANDON's Blog
  • Phoenixflood's Blog
  • Brett Breakin' Rocks' Blog
  • Seattleguy's Blog
  • jkfoam's Blog
  • Erwan's Blog
  • Erwan's Blog
  • marksfossils' Blog
  • ibanda89's Blog
  • Liberty's Blog
  • Liberty's Blog
  • Lindsey's Blog
  • Back of Beyond
  • Ameenah's Blog
  • St. Johns River Shark Teeth/Florida
  • gordon's Blog
  • West4me's Blog
  • West4me's Blog
  • Pennsylvania Perspectives
  • michigantim's Blog
  • michigantim's Blog
  • lauraharp's Blog
  • lauraharp's Blog
  • micropterus101's Blog
  • micropterus101's Blog
  • GPeach129's Blog
  • Olenellus' Blog
  • nicciann's Blog
  • nicciann's Blog
  • Deep-Thinker's Blog
  • Deep-Thinker's Blog
  • bear-dog's Blog
  • javidal's Blog
  • Digging America
  • John Sun's Blog
  • John Sun's Blog
  • Ravsiden's Blog
  • Jurassic park
  • The Hunt for Fossils
  • The Fury's Grand Blog
  • julie's ??
  • Hunt'n 'odonts!
  • falcondob's Blog
  • Monkeyfuss' Blog
  • cyndy's Blog
  • pattyf's Blog
  • pattyf's Blog
  • chrisf's Blog
  • chrisf's Blog
  • nola's Blog
  • mercyrcfans88's Blog
  • Emily's PRI Adventure
  • trilobite guy's Blog
  • barnes' Blog
  • xenacanthus' Blog
  • myfossiltrips.blogspot.com
  • HeritageFossils' Blog
  • Fossilefinder's Blog
  • Fossilefinder's Blog
  • maybe a nest fossil?
  • farfarawy's Blog
  • Microfossil Mania!
  • blogs_blog_99
  • Southern Comfort
  • Emily's MotE Adventure
  • Eli's Blog
  • andreas' Blog
  • Recent Collecting Trips
  • retired blog
  • andreas' Blog test
  • fossilman7's Blog
  • Piranha Blog
  • xonenine's blog
  • xonenine's Blog
  • Fossil collecting and SAFETY
  • Detrius
  • pangeaman's Blog
  • pangeaman's Blog
  • pangeaman's Blog
  • Jocky's Blog
  • Jocky's Blog
  • Kehbe's Kwips
  • RomanK's Blog
  • Prehistoric Planet Trilogy
  • mikeymig's Blog
  • Western NY Explorer's Blog
  • Regg Cato's Blog
  • VisionXray23's Blog
  • Carcharodontosaurus' Blog
  • What is the largest dragonfly fossil? What are the top contenders?
  • Test Blog
  • jsnrice's blog
  • Lise MacFadden's Poetry Blog
  • BluffCountryFossils Adventure Blog
  • meadow's Blog
  • Makeing The Unlikley Happen
  • KansasFossilHunter's Blog
  • DarrenElliot's Blog
  • Hihimanu Hale
  • jesus' Blog
  • A Mesozoic Mosaic
  • Dinosaur comic
  • Zookeeperfossils
  • Cameronballislife31's Blog
  • My Blog
  • TomKoss' Blog
  • A guide to calcanea and astragali
  • Group Blog Test
  • Paleo Rantings of a Blockhead
  • Dead Dino is Art
  • The Amber Blog
  • Stocksdale's Blog
  • PaleoWilliam's Blog
  • TyrannosaurusRex's Facts
  • The Community Post
  • The Paleo-Tourist
  • Lyndon D Agate Johnson's Blog
  • BRobinson7's Blog
  • Eastern NC Trip Reports
  • Toofuntahh's Blog
  • Pterodactyl's Blog
  • A Beginner's Foray into Fossiling
  • Micropaleontology blog
  • Pondering on Dinosaurs
  • Fossil Preparation Blog
  • On Dinosaurs and Media
  • cheney416's fossil story
  • jpc
  • A Novice Geologist
  • Red-Headed Red-Neck Rock-Hound w/ My Trusty HellHound Cerberus
  • Red Headed
  • Paleo-Profiles
  • Walt's Blog
  • Between A Rock And A Hard Place
  • Rudist digging at "Point 25", St. Bartholomä, Styria, Austria (Campanian, Gosau-group)
  • Prognathodon saturator 101
  • Books I have enjoyed
  • Ladonia Texas Fossil Park
  • Trip Reports
  • Glendive Montana dinosaur bone Hell’s Creek
  • Test
  • Stratigraphic Succession of Chesapecten

Find results in...

Find results that contain...


Date Created

  • Start

    End


Last Updated

  • Start

    End


Filter by number of...

Found 9 results

  1. Doug Von Gausig

    Unknown fossils - Receptaculites?

    The two sides of a single small chunk of limestone show two very different fossils. One side may be a Receptaculites, and the other I don't recognize. The rock was found on the surface in an area of mixed cobble, formerly an ancient riverbed, so the origin is uncertain. Most of the old limestones in the area are Devonian or Carboniferous. The stone's about 4 cm long. The area it was found was also inhabited by the Sinagua people, who abandoned the site about 700 years ago. They could have transported the stone from somewhere or traded for it? Any ideas what these fossils are?
  2. This is my first post of a Fossil Trip I took. I'm also fairly new to identifying fossils and researching the geological makeup of various sites. The trip was fun and writing about it really helped me organize my finds. (Sorry to use a sharpened pencil to indicate size. I want to get one of those cool metallic-looking cubes I see on TFF. If somebody can tell me where to get one, I'd be very grateful.) I recently went on vacation about 8 miles East of Galena, Illinois. I had checked with a few local and regional rock and fossils groups to see whether anybody knew of collecting sites around Galena. Nobody knew of any, so my hopes of getting some fossil collecting done while vacationing were not high. However, I have a nicer story to tell. First, I happened upon a road cut about three minutes from where I was staying that had a few hidden treasures. Second, there was also a rock quarry about five minutes from where I was staying, and the owner was gracious enough to let me go look around. Third, on the way home I was able to take a detour to the famed Graf, Iowa location. So here’s my story. Part I. I was staying in a rented house in an area called Galena Territory. I had noticed a few road cuts on the drive in. From the research I did, much of the outcroppings in that area are unsurprisingly from the Galena group, which is made up primarily of dolomite and limestone. It sits on top of the Platteville Group and under the Maquoketa Group of the Cincinnatian Series. On one of the local roads, about 5 minutes from where I was staying, I found a road cut that stretched for about 200 feet on either side of the two-lane road. There was a shoulder just wide enough to park on. Traffic was light. The app, Rockd, using my latitude, longitude and elevation told me the rock there was from the Ordovician, 457 - 451 Ma, and stratigraphically part of the Millbrig k-Bentonite Bed. A map I found on line confirmed this. There was a fair amount of undergrowth on the bottom of the slope, especially on the West side. This was a place where you have to enjoy the looking as much as the finding. I often thought I would quit the site, only to find a single cool piece followed by long stretches of nothing. My three coolest finds were a large maclurlites. Here’s the domed side. And here's the flat side What I think is a hormotoma gastropod And a gastropod that may be of the Lophospira species. It gave me a nice feeling to find a site on my own that had these treasures. Part 2. Quarry near where I was staying. I called a local quarry that yields mostly Ordovician dolomitic limestone. I explained I was an amateur fossil collector visiting the area, and the owner kindly let me go there to look around. He made it clear, quite reasonably, that I had to stay away from the machinery and from the sites where they were actively extracting stone. When I got there and introduced myself to one of the employees, he showed me a few really cool specimens they had found and had laid aside. My favorite was a polished slab that contained a large portion of a receptaculites, sometimes called a “sunflower coral” even though it’s not a coral. It is possibly a calcareous algae. They also had what I think were two very large Oncocerid fossils (“giant squids”). Finally, they had a polished slab with a very large orthoceras impression. After they showed me these, I mostly poked around the area just inside the entrance, where there was a fair amount of broken pieces of stone of various sizes. I didn’t feel the invitation included permission to break open rocks, so I contented myself with picking up a few small specimens, a brachiopod that sparkles with pyrite (although this doesn’t show up well in the picture) and two tiny fragments of receptaculites. Part 3. I had read a lot about the road cut in Graf, a farm town in Iowa with a population just shy of 70. The area consists primarily of corn and soy-bean crops with a scattering of cattle. This road cut is an amazing site to find specimens of the cephalopod isorthoceras. I find it hard to fathom both how so many of these fossils exist in this one small region and how they have not all been collected by now. So on my way home from Galena, I took a slight detour to visit Graf. Being both an introvert and a bit on the anxious side, on my way there I worried that there would be a lot of other people looking for fossils, that the fossils would all be gone by the time I got there, and that somehow some local authority would tell me that I shouldn’t be there and can’t collect fossils at that site. None of these worries came true. Nobody else was there collecting fossils. There were plenty to find. And not a single person stopped by to tell me I had to leave. The rocks are shale, dolomite and limestone from the Elgin Member of the Maquoketa Formation. This places them in the Upper Ordovician. I was there from about noon to 3 PM. There is a bike trail across from the collecting site, and I did see a number of cyclists. And there were two fairly long convoys of large farm equipment that drove past slowly. I suspect the farmers are used to seeing lone people climbing the slopes at that site. Most of the pictures of the site I had seen must have been taken either in early spring or late autumn because I was not prepared for the amount of vegetation covering the slopes in the second week of July. The undergrowth (which I will also call “overgrowth” and “vegetation” as the mood strikes me) kept me for the most part toward the bottom of the road cut among rocks and specimens that had fallen loose from places higher up. You can see part of the rock slope in the very back of this picture. The rock in that layer is mostly limestone and dolomite. Despite not having direct access to the top layers, I had an amazing haul. (And, to tell the truth, those top layers looked pretty spooky. The overhang on them is daunting.) There were a few spots where rocks were visible and the weeds were cleared. Perhaps there had been small rockslides that cleared these areas, or perhaps somebody before me had yanked or hacked away the vegetation in these spots. I actually found more specimens when I looked under the overgrowth than when I looked in these cleared areas. Maybe the cleared areas has been picked through recently. Of course, the vegetation has defenses against marauders. So be more careful than I was. Luckily, the scratches were superficial and cleared quickly. (I cannot attest to the presence or absence of poison ivy. I’m not susceptible to it and am not good at identifying it.) But the thickness of the vegetation and the frequent presence of thorns limited how high I could climb in most places. I mostly pulled ivy away with the pick side of my geological hammer and saw many, many fragments of isorthoceras lying about underneath for the picking. It was so much fun to spot them and fill my shirt pocket, which I had to unload several times into my rock bag. There were so many specimens to find that I collected over a distance of perhaps only 100 feet from where I parked my car. The picture below is taken from the furthest spot I collected with my car in the distance. (You can see, as others have mentioned on this forum, that there is no shoulder to the road. I pulled over into some tall grass. The ground starts to slope down fairly close to the edge of the road. Luckily it wasn’t muddy, and I didn’t get stuck.) Despite that short distance, I probably found about 100 loose isorthoceras fragments of varying sizes. Here’s my haul of loose pieces all spread out back at home. I also found some larger rocks with isorthoceras embedded in them. Some of these were underneath the vegetation toward the bottom of the outcropping. Some, though, I had to climb a bit higher to find. (The slope was steep and the footing was not guaranteed. Sometimes I drove my rock hammer’s pick into the ground to pull myself higher. In some places, there were a few hearty small trees that I could grab onto. But be careful, because there are also small, dead trees that break away easily and provide no support.) I found one stone about two meters up that was actually fairly fragile. I was able to break off some pieces at the edges with my bare hands. The six pieces I pulled off are less gray and are laid out underneath the larger grey stone at the upper margin of the picture. I hope the resolution of the image I uploaded is good enough for you to enlarge it and see some of the fossils in the stone pieces. The largest piece is a coquina (a rock made up almost entirely of fossils) that I brought home. I’ll show a pic of this nice piece all washed up but otherwise not prepped soon. After about three hours of collecting, I was getting tired and my rock bag was getting full. So I decided to head home. I had so many fossils by this point that a rock had to be pretty special for me to keep it. For example, this one which wasn’t particularly well preserved, I left for somebody else. Here is a picture of all the specimens I collected that were not just loose isorthoceras. Again, I hope you are able to enlarge the picture, zooming in to see details. And here are some close-ups of a few of the nicer ones. First the big coquina I mentioned above. Here is one that contains mostly impressions. Here’s another one that I like, showing how sometimes the fossils intersect each other in interesting ways. Although most of the fossils there are from the same cephalopod species, there were some other fossils as well. These other fossils tended to be very small. (I’ve read that the shale layers have more of these small fossils, but I didn’t have any luck looking in the shale.) Two gastropods and a brachiopod. Finally, one can find rocks containing some very, very tiny fossils whose identity has been debated. Some say they are scaphopods, others say they are a different type of tube-shaped mollusk, and still others a calcareous worm tube. https://www.google.com/amp/s/vmnhpaleontology.wordpress.com/2011/07/02/graf-iowa/amp/ Quite a trip! And now I need to find a place to put all these new specimens. Sometimes it’s easier to find them than to organize and store them. Maybe that’s because the hunt is the fun part.
  3. These tiny fossils I suspect of being Receptaculites, but I'm not at all sure. The patch is about 12x12mm, about the size of a dime. It's on Martin formation dolomite from the Devonian, Verde Valley, Arizona. Other fossils on the same rock include Rugose and Tabulate corals and unidentified Brachiopods. Note the lichens growing in and on the sample. Any ideas?
  4. Caverat

    Recptaculites? Odd structures

    I have several Receptaculites, if fact it was the first fossil I noticed as a 7 year old! The specimen I'm going to post is unusual in my collection due to an interesting pattern. Perhaps a more knowledgeable researcher can explain what It is.... The first image displays the specimen (the light blue grid is one inch) and the second is a closeup of the pattern covering the smooth areas on the right side.
  5. I only recently got into collecting after being out hiking and literally tripping over a large coral fossil a couple years ago and the hunt has been on since! SO much to learn! I wish I'd have started 30 or 40 years ago. I haven't posted any of my finds as I've been trying learn a little first and see if I could identify some of these. I think I've got some of them and others I haven't found a name for, so I hope you don't mind me dumping several on you. Are all these Receptaculites Oweni? They were found in the Galena dolomite in the Dubuque area in what I think is the Fairplay member of the Dunleith. (30 or 40 feet above river level) The third photo of the slightly smaller one was found in a drainage ravine so I can't be sure the layer it came from, but I don't believe it had been carried very far if at all. It was 30 or 40 feet higher than the other two. Is the last one Ischadites Iowensis or another Oweni? Is there a good guide to these somewhere? These next are of a nautiloid I haven't found the name for. This was found in the Guttenburg member of the Decorah also in the Dubuque area near river level. It was in the outcrop about a foot above the top of what I think is the Spechts Ferry member. I also found quite a few Rafinesquina brachiopods laying around in the talus and the pygidiums of a couple different trilobite. I think one is Gabricerarus Mifflenensis and the other Isotelus? It looks a lot like the ones in the last photos of what I'm pretty sure are some Isotelus Iowensis I found near Elgin, IA). Are these Isotelus Iowensis? These were found near Elgin, IA in what I think is the Elgin member of the Maquoketa. About a foot above the Turkey river that day. You can actually make out what I assume are compound eyes? Being kind of new to this I'm amazed at the detail you can still see in some of these for something so old. I haven't found the name of these cephalopods yet either. They were found the same day and not far from the trilobites in Elgin and about 5 or 6 feet higher in the rock layer.
  6. Bronto

    What is this? Receptaculites?

    I found this in a field hunting fossil wood. Back in 2006. : Field of view about 10mm. The pinched end of what I had assumed to be some sort of coral. Helena, Texas. The end view is ground smooth & shows 2mm circular whirls. With spiraling partitions. Almost impossible to photograph. I can only see one clearly with 10X. This fossil may be a negative cast? As the crust of the stone spalled. Anyhow- with nothing to compare. I have decided to put money on Receptaculites.......-=James
  7. Dpaul7

    Receptaculites a.jpg

    From the album: MY FOSSIL Collection - Dpaul7

    Receptaculites SITE LOCATION: Decorah, Iowa, USA TIME PERIOD: Ordovician Period (445-485 Million Years ago) Data: Receptaculites is the name-bearing genus for an extinct group of conspicuous benthic marine genera, the Receptaculitidae, that lived from the Early Ordovician through the Permian period, peaking in the Middle Ordovician. The group's phylogenetic origin has long been obscure, but the current understanding is that the Receptaculitidae were calcareous algae, probably of the Order Dasycladales. Receptaculitids lived in warm, shallow seas and have been described from all continents except Antarctica. In some areas they were important reef-formers, and they also occur as isolated specimens. Receptaculites and its relatives have a double-spiral, radiating pattern of rhombus-shaped plates supported by spindle-like objects called meroms. Fossils can usually be identified by the intersecting patterns of clockwise and counterclockwise rows of plates or stalk spaces, superficially similar to the arrangement of disk florets on a sunflower -- hence the common name "sunflower coral" Kingdom: Plantae Phylum: Chlorophyta Class: Chlorophyceae Order: Dasycladales Family: †Receptaculitidae Genus: †Receptaculites
  8. Dpaul7

    Receptaculites a.jpg

    From the album: MY FOSSIL Collection - Dpaul7

    Receptaculites SITE LOCATION: Decorah, Iowa, USA TIME PERIOD: Ordovician Period (445-485 Million Years ago) Data: Receptaculites is the name-bearing genus for an extinct group of conspicuous benthic marine genera, the Receptaculitidae, that lived from the Early Ordovician through the Permian period, peaking in the Middle Ordovician. The group's phylogenetic origin has long been obscure, but the current understanding is that the Receptaculitidae were calcareous algae, probably of the Order Dasycladales. Receptaculitids lived in warm, shallow seas and have been described from all continents except Antarctica. In some areas they were important reef-formers, and they also occur as isolated specimens. Receptaculites and its relatives have a double-spiral, radiating pattern of rhombus-shaped plates supported by spindle-like objects called meroms. Fossils can usually be identified by the intersecting patterns of clockwise and counterclockwise rows of plates or stalk spaces, superficially similar to the arrangement of disk florets on a sunflower -- hence the common name "sunflower coral" Kingdom: Plantae Phylum: Chlorophyta Class: Chlorophyceae Order: Dasycladales Family: †Receptaculitidae Genus: †Receptaculites
×
×
  • Create New...