Jump to content

Search the Community

Showing results for tags 'twin cities'.

  • 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...

  1. Tetradium

    Anazyga plinthii

    From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota

    Flatter than A. recurvirostis and a bit bigger.
  2. Tetradium

    Anazyga lebanonensis

    From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota

    Those are the closest specimen I could find that I think is Anazyga lebanonensis. Described as longer in length than the other two Anazyga species from Decorah Formation.
  3. Tetradium

    Lepidocyclus

    From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota

    Lepidocyclus - Decorah Formation only? For me I hadn't found it in Platteville formation for unknown reason - could be locations. Very abundant and highly variable in forms - I suspects quite a few genus and species can be easily mistaken for this one. Part of it is I only find the smallest ones as strongly triangular and more flat with sulcus not as prominent. But all the bigger one are much more inflated. Plus costae is pretty uniform over all species. Transverse growths are sometimes prominent on anterior portion of the shell, usually on adult specimens.
  4. Tetradium

    Triptoceras lambi

    From the album: Minnesota Ordovician Decorah Cephalopods

    different specimen, very fragile. Side view showing the siphuncle. Uncommon in Decorah Formation Twin Cities Minnesota.
  5. Tetradium

    Triptoceras lambi

    From the album: Minnesota Ordovician Decorah Cephalopods

    One of the largest Triptoceras species I have found in Decorah Formation Twin Cities Minnesota. This is a very worn specimen with septae lines barely visible.
  6. Tetradium

    Triptoceras planodorsatum

    From the album: Minnesota Ordovician Decorah Cephalopods

    Triptoceras planodorsatum Decorah Formation, Twin Cities, Minnesota. Very small, this is a side view showing the bend.
  7. Tetradium

    Triptoceras planoconvexum

    From the album: Minnesota Ordovician Decorah Cephalopods

    Triptoceras planoconvexum appear to be medium sized compared to the other Triptoceras species from Decorah Formation in Twin Cities. Rare.
  8. Tetradium

    Whitfieldoceras mumiaforme

    From the album: Minnesota Ordovician Decorah Cephalopods

    Apparently Whitfieldoceras mumiaforme lasts into Decorah Formation from Platteville formation. This specimen has barely visible septae and is very thin. Seem to have enlargement on the left side which is constant with Whitfieldoceras and a bend along a certain portion of the shell. Ordovician, Decorah Formation, Twin Cities Minnesota. Rare.
  9. Tetradium

    Cyrtoceras sp.

    From the album: Minnesota Ordovician Decorah Cephalopods

    Top view - Rare in Decorah Formation Twin Cities. Small size, the muddy limestone made it hard to tell what species it is.
  10. Tetradium

    Poterioceras apertum

    From the album: Minnesota Ordovician Decorah Cephalopods

    Poterioceras apertum found in St. Paul Decorah Shale Spring 2023. Rare from the looks of it.
  11. Tetradium

    Homotrypa minnesotensis

    From the album: Bryozoan of Minnesota Ordovician

    One of the longest rugosa bryozoan that i have found so far in Decorah Shale Formation. Branches subcylindrical, branching of equal thickness. Long intervals between branches. Clusters of large cells are conspicuous, The one in the northern most part of this picture might have a crinoid holdfast.
  12. Tetradium

    ?Cyrtodontula compressa

    From the album: Bivalves of Platteville/Decorah Formation Minnesota

    Whitella is an invalid genus name - all specimens once called Whitella is in Cyrtodontula. Found in Decorah shale - the largest uncommon bivalve I have ever found in Decorah Shale as of 2021. There could be others since all bivalves are listed as uncommon to rare in Decorah shale. It could be my bias but oddly enough I only find mold impressions of this one (all 3 individuals) as negative molds in limestone without any hard shale encrust in the hollows. Trying Paint to show outlines - strongly resembles modern Anadara notabilis in general shape for example - its NOT related to Anadara. I'm only picking the name Cyrtodontula compressa for now since its the only one that at least for me closely resembles the fossils in shape and sizes. Forgot to add ruler so measurements roughly from where estimated hinge line to farther part of the mold is 50 mm for the two smaller individuals and 60 mm for the larger individuals.
  13. Tetradium

    100_9247

    From the album: Bryozoan of Minnesota Ordovician

    Batostoma species from Mifflin portion of Platteville Formation. Since there hadn't been any official researches into platteville bryozoan, I would assume this to be a early forerunner of Batostoma fertile as it looks very similar to it but on average smaller. One rock have a different species running parallel but camera couldn't get more details.
  14. Tetradium

    100_9233

    From the album: Bryozoan of Minnesota Ordovician

    Stictoporella frondifera. Very localized abundant in lower Decorah formation Minnesota, Ordovician, Twin Cities.
  15. Tetradium

    100_9227

    From the album: Bryozoan of Minnesota Ordovician

    "Batostoma minnesotense" Decorah shale Twin Cities Ordovician. I couldn't tell any difference under digital microscope or by eye examination so any similar species are lumped by me under it. Very abundant in Decorah Shale. Only difference between this and Batostoma fertile is by compare of side by side specimens. Batostoma fertile have larger zoarium that is noticeable with the naked eye.
  16. Tetradium

    100_9224

    From the album: Bryozoan of Minnesota Ordovician

    Batostoma fragile Decorah Shale Ordovician Twin Cities Minnesota. When comparing all bryozoan fossils from Ordovician this one stands out as having the largest zoarium. (fossil terms for the pores). Its also the largest branching bryozoan I had found in terms of masses. One thing I have noticed with this is compare to "Batostoma minnesotense" It tend to be ,more lumpy and more flexible into forms, even at times mistook for Prasopora conoidea if not for its larger zoariums.
  17. Tetradium

    20210323_1107_001_0.000

    From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation

    This is my first digital microscope picture submitted to this website. I tried it on bryozoan but couldn't see any significant differences. Part of Amphilichas cephalon close up. It was suitable because of its tiny size but was too big to get a full screen. Note the bumps on the eyes.
  18. Tetradium

    100_9177

    From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation

    Ceraurid hypostome. Platteville Formation (SW corner specimen) and rest are Decorah Formation. For a long time I thought it was little rolled up trilobites, that's how much the hypostome look like. Tiny .5 cm for Decorah ones and .6 cm for platteville ones. Decorah ones seem to be uncommon to common and very easily overlooked because of its tiny size. Heck I wonder how many had I overlooked over 5 years.
  19. Tetradium

    100_9175

    From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation

    Amphilichas sp. cephalon. This is pretty small - .7 cm across. Platteville Formation Twin Cities Minnesota. Rare. Its cephalon is very distinct, having 5 well definite lobes.
  20. Tetradium

    100_9170

    From the album: Trilobites of Minnesota Decorah/Platteville/Galena Formation

    Sceptaspis lincolnensis cephalon with damage to one eye and part of head. 1.7 cm across. Platteville Formation Twin Cities. Rare at least to me.
  21. Tetradium

    100_8994

    From the album: Corals of Decorah Minnesota

    Platteville formation Lambeophyllum profundum. Outer laver are gone. Uncommon to rare.
  22. Tetradium

    100_9085

    From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota

    not identified yet. Two very similar genus.
  23. Tetradium

    100_9090

    From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota

    Unidentified orthid for now. Strongly resembles Dalmanella sculpta but have sharp edges.
  24. Tetradium

    100_9142

    From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota

    Pionodema conradi. I knew I had some tiny orthid brachiopod from Middle Platteville Formation but after checking book and this website: https://2dgf.dk/xpdf/bull26-01-02-115-132.pdf Kind of weird. I think Hesperorthis concava was invalid - too similar and two very close look alike can't compete with each other. One other brachiopod mention on the list Campylorthis deflecta look too much like Strophomena species despite a website saying genus name is valid.
  25. Tetradium

    100_9141

    From the album: Brachiopods of Platteville/Decorah Twin Cities Minnesota

    Zygospira sp. Apparently there are a mystery with this genus when it comes to Twin Cities. I first noticed it only from Middle Platteville Formation - 100% nonexistent from upper Platteville Formation. Much more finer costae compare to Rostricellula minnesotensis and generally smaller. Belongs in Spiriferid family despite it strong resemble to Rhyconellid family. Then after a very long absent either the same species or a very similar species popped up again in upper Decorah formation and became very abundant. I suspects the reason for this seemly weird pattern is they may be much more specialized into the type of sediments that laid on the ocean floor. The middle platteville had layers of high carbonate shale mixed in, which does not exists in upper and lower Platteville formation. Then upper Decorah formation had a harder type of shale - middle and lower Decorah formation have shale that breaks into pieces very easily. Plus from my experiences with modern Florida gastropods there are two endemic species of gastropods that had very narrow ranges. One I don't have specimens of is Sanbriel Island turret snail which is endemic to southwest mainland Florida. Not found anywhere else. The other snail species, Shiny Atlantic auger, Hastula hastata is only found generally around Jupiter Island on Atlantic side. At first it may seem like the two snail species have nothing in common but I find it interesting that they occurs in a small zone in between the carbonate sediments of far southern Florida to the keys and the sandy rubble to the north.
×
×
  • Create New...