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Found 15 results

  1. austinklal

    is this a fossil?

    Found this snorkling off electric beach in oahu. Is it a fossil?
  2. Dino-nugget

    Is this a claw?

    Hello all! I am wondering if anyone can let me know if what I found is anything that belongs in this forum (a fossil) and if so, what it may belong to. I found this at a beach in Oahu near Honolulu. Outside of an interest in all things Dino (basic knowledge), I have never hunted for fossils and stumbled upon this in the hopes of finding a good shell or a shark tooth, but really know nothing. So any clarification is appreciated!
  3. Mikrogeophagus

    Hawaiian Hunting

    A couple days ago I embarked on an adventure to a site I was never expecting to visit. The setting was a family vacation to the Hawaiian islands of Maui and Oahu and I initially had no intention of crawling around in gravel bars as I so often do at home. Nevertheless one thing led to another and I ended up going on a hunt that was perhaps the most unforgettable outing of my fossil career and I came away with some amazing specimens impossible to find anywhere else. Maui Our trip started on the lesser populated island of Maui which is a bit younger than its sibling Oahu. The landmass can be described as a valley where two large volcanoes form the east and west edges. The Hawaiian islands get older as you travel westward and this trend is true for Maui. The western half of the island is about 1.3 million years old whereas the eastern is only about 0.75 million. To my knowledge, there isn't any fossil bearing strata on the shores, but that doesn't mean a fossil hunter will be left with nothing to do on their visit. Snorkeling was my main activity throughout the trip. Of course there are tons of interesting sea creatures to admire on the visit, but I think my recent fossil interests have given me an extra sense of appreciation for the ocean life. I don't have any underwater equipment, so there's sadly no photos from beneath the waves, but I captured some neat stuff from out of the water. Horn-eyed Ghost Crab catching a wave (Ocypode ceratophthalmus) Little green crab washed out of the water Had no idea what this was at first (between starfish or urchin). Turned out to be a helmet urchin which is adapted for attaching strongly to rocky surfaces. Colobocentrotus atratus I was surprised to find that the beach sand contained millions of tiny urchin spines mostly from the rock boring urchins living just beneath the waves. I didn't take any home, but occasionally a large red spine from a pencil slate urchin would wash up as well. Rock boring urchin spines Most of the beaches on Maui weren't all that great for combing. It wasn't until I took a closer look in the waters that I finally came across a spot with gravelly deposits. As I snorkeled it was impossible to keep my eyes away from them and I kept hallucinating various fossils showing up. Eventually, one hallucination actually proved to be the real deal, so I held my breath and dove down a few meters to retrieve what I had spotted. Echinometra mathaei While technically not a fossil, these recently-deceased oblong urchins were too cool to leave alone. They belong to the species Echinometra mathaei which is the most common urchin in Hawaii. When it comes to fossils, understanding the original animal's behavior is a difficult task. In this instance, it's actually very easy as the living counterparts are literally all over the place. They are a burrowing urchin that use their spines and teeth to carve out rocky holes for hiding during the day. At night they leave to graze on algae. Makes me wonder what sort of neat behaviors are hidden amongst our local Cretaceous urchins here in Texas . Besides urchins, I also came across some beautiful Hawaiian Snakehead Cowries (Monetaria caputophidii) as well as one Granulated Cowry (Nucleolaria granulata). Both of which are endemic to Hawaii. Monetaria caputophidii Nucleolaria granulata That about sums up the Maui finds. This pushed me to do a little research on fossils in Hawaii and I was surprised to find on FF that Oahu was actually known to possess some Pleistocene reef. @hemipristis has a lot of great stuff on the island! I saw him mention finding teeth on one of Oahu's coasts in the Waimanalo Fm. I did a little satellite searching on that particular coast and found 3 potential spots to later check out. Oahu For those interested in the geology, the Waimanalo Formation is Pleistocene-aged limestone resting atop basalt at various points around the island. While the island is 3-4 million years in age, the Waimanalo Formation is only about 130 thousand. This age is significant because it aligns with the latest interglacial period known as the Eemian or Sangamonian Stage. Despite being nestled within glacial periods, this point in time was actually quite warm and sea levels were accordingly raised. The ocean was about 8 meters higher compared to today. It's fascinating to observe fossils from such a unique time period. Of the three potential sites, I was only able to find access to two. Of the two, one site was a bust and had no sign of the Waimanalo being completely volcanic. Thankfully, I found one amazing site. I made a brief initial visit where I hunted mostly the exposure itself. The finds were only invertebrate in nature consisting of gastropods, bivalves, and crab claws. These were cool, but they didn't meet my highest goal of finding a Hawaiian shark tooth. My family was waiting on me, so I didn't get the chance to browse the gravel talus underneath. On the last day of the trip, after some begging and various concessions, I was granted just one hour to hunt which I gladly took. I sprinted out to the site so as to not waste any time. It was hot and humid. The black lava rocks absorbed a lot of the heat and were uncomfortable to navigate, but that didn't dissuade me. In all the gravel there had to be at least one shark tooth. The first vertebrate find turned out to be bony fish. I've never found one of these before, but I've seen similar stuff across the web from around the world. These are usually referred to as pufferfish mouth plates, but they are actually from the family Diodontidae or porcupinefish/burrfish. This particular specimen was burnt orange and possessed partial jaw elements as well as fossilized worms tubes on its surface. I was leaping up and down! After reading more on the topic, it seems that this belongs to the genus Chilomycterus and perhaps the species C. reticularus commonly known as the Spotfin Burrfish (the only Chilomycterus species found in Hawaii today). Chilomycterus reticulatus jaw fragment Not too long after I found a couple more mouth plates, but this time not from a burrfish. Whereas burrfish (Chilomycterus) only have about 1-4 sheets exposed on their crushing dentition, porcupinefish (Diodon) have much more at 10-18 according to a conversation I found on ResearchGate. In Hawaii, the genus Diodon is represented by two species: the larger D. hystrix and smaller D. halocanthus. It's difficult for me to make a distinction between the two species, so I'll just have to stick with Diodon sp. for now. The first porcupinefish specimen was only a large broken half. The second specimen, however, is quite a beauty and one of my favorite fossils of all time! Diodon sp. in original matrix with volcanic inclusions This piece is about as Hawaiian as a fossil can get. The ancient reef bed the mouth plate is preserved in also features numerous small volcanic inclusions. After some time collecting the gastropods not already picked up from the prior visit, I stumbled upon what I had been dreaming of the entirety of my visit. Sitting plainly atop the rubble was a tan shark tooth in nice condition. I tried to milk the moment a little, picking it up slowly and soaking in every second. I was at a total loss for words and more or less silently slipped it into my pouch. It is likely from the species Carcharhinus melanopterus also known as the Blacktip Reef Shark and the most common shark in Hawaii today. I suppose there are many other Carcharhinus species present in the area, but I think Blacktip is the most likely. Before this tooth, my youngest shark was from the Eocene strata at the Whiskey Bridge. This was quite the temporal extension to my collection . Carcharhinus melanopterus At the very end of the hunt, I picked up a fragment of a shark tooth with fine serrations. I think it is likely also Carcharhinus melanopterus, but it's hard to say. Its size is very small. Carcharhinus melanopterus? So that about wraps up this unforgettable hunt! It's crazy to think that the second state I'd ever find a fossil on wasn't some place like Oklahoma. It's a surreal feeling to look at these various finds and imagine their lives 5 timezones away and 130 thousand years into the past. Hopefully you enjoyed reading this post almost as much as I enjoyed writing it! Here's the overview of the rest of the finds from Oahu: The species are based off of what I can find from modern Hawaiian waters Various crab bits Tellinella crucigera Quidnipagus palatam Unknown bivalve Ctena bella Unknown Monoplex nicobaricus? Cypraea sp. Nerita picea Peristernia sp.? Conus aff. spiceri Canarium sp.? Canarium sp.? Littoraria sp. Amplustrum amplustre? (Look up "Bubble snail") Morula lepida Ceritherium sp. Drupa aperta Cellana sp. Unknown Thanks for reading! Monachus schauinslandi
  4. Louis71

    Maui shark tooth?

    Hello. First Ive read that noone finds shark teeth in Hawaii. I have found teeth in other locations but this has me wondering. The shore on South Maui is full of coral and lava rock. There are A LOT of sharks here. Could this be a tooth that is worn down from the abrasive nature of the shore? Thanks!
  5. After doing some research a few weeks back on the distribution of the extinct Haast's eagle (Hieraaetus moorei), I discovered there was a much larger array of large Accipitridae on island environments than I previously realized (the result of island gigantism) during the Pleistocene-Early Holocene. Sadly, many of these animals are now extinct asa result of direct human hunting or hunting of their food sources by the early-late Holocene. I've decided to make a quick list of all those I've identified, which hopefully can demonstrate the diversity these magnificent animals had during the Pleistocene-Early Holocene. Let me know if I forget any examples. New Zealand - Haast's eagle (Hieraaetus moorei) (Pleistocene-late Holocene (At least 1450 A.D.)) Eyles's Harrier (Circus teauteensis) (Pleistocene-Holocene) Crete - Cretan subspecies of the Golden Eagle (Aquila chrysaetos simurgh) (late Pleistocene) Cuba - Gigantohierax suarezi (Holocene) (0.012-0.005 years ago) Gigantohierax itchei (Holocene) (0.012-0.005 years ago) Borras's eagle-hawk (Buteogallus borrasi) (Pleistocene-early Holocene) Bahamas - Bahamian Titan Hawk (Titanohierax gloveralleni) (Pleistocene-Holocene) Hispaniolan Titan Hawk (Titanohierax sp.) (Pleistocene-Holocene) New Caledonia - Powerful goshawk (Accipiter efficax) Madagascar - Malagasy crowned eagle (Stephanoaetus mahery) (Pleistocene-late Holocene (at least 1500 A.D.)) Hawaii - Haliaeetus sp. (either new Haliaeetus species or a subspecies of the extant White-tailed Eagle (Haliaeetus albicilla)) (Pleistocene-Holocene) What do you guys think?
  6. A follow-up/continuation of my previous post, here are some of the fossil invertebrates from the Pleistocene Waimanalo Formation of Oahu, Hawaii, USA. First the echinoids. I haven't speciated these yet
  7. Hi there, My wife and I are currently honeymooning in Hawaii on the south shore of the island on Kauai over in the town Poipu. There’s limestone cliffs there and I read about Holocene aged fossils, such as bird fossils, found a few miles away at the Makauwahi Cave Reserve. I wasn’t fossil hunting, but we were walking along a public beach and there appeared to be a couple of bones eroding out of a peat deposit, near a limestone cliff. I’m not so good with distinguishing more modern fossils such as Holocene or Pleistocene. Any idea if this bone is modern or fossilized? looking at an old post in the Hawaii section, it does somewhat look like the fossil bird bones @Auspex posted from this area. Thanks for taking a look!
  8. I had a couple of requests to show the shark teeth that I have found from Hawaii. I am pleased that folks are interested! All of the fossils were collected directly from the Mid- to Late- Pleistocene Waimanolo Formation. The formation is a mixture of deltaic/nearshore limestone and unconsolidated sands and silts. First, the shark material. There are a group of teeth and two vertebral centra. The shark teeth are in various stages of mineralization, with some completely phosphatized while others haven't altered much since they fell out of the shark's mouth. They appear to be from the blacktip reef shark, Carcharhinus melanopterus, a species currently common in Hawaiian waters. I also had 1 Scyliorhinid tooth, but misplaced it years ago. The vertebral centra are from a Carchariniform shark, probably the C. melanopterus, and seemingly unaltered, which is consistent with the turtle, bird, and some of the fish material that I collected. While some may consider these subfossils, I did recover them from the formation itself, which dates to 400,000 BP, which makes them fossils. The lack of mineralization may be due to the significant carbonate content and resultant high pH of the sediments.
  9. marfijak

    Hawaii Modern Bone Beach Find

    Bone is 6 inches across and was found on a beach in Hawaii.
  10. Hello everyone, I'd like to share my extreme budget collection of exotic megs/shark teeth so far, I've have been collecting shark teeth and other for a little over a year and a half now on an extremely tight budget and have been surprised by what I was able to get a hold of so far. Condition doesn't bother me hence the budget but I have been able to find some megs from from interesting locations over the short period of time I've been collecting with a little bit of luck. Locations include Puerto Rico, Cuba, Japan, Hawaii, Morocco, Mexico, Peru, and The Phillipines. Anyone else out there with extreme budget rare finds especially shark teeth (or from generally exotic locations), feel free to share and I'd love to see! In order of pictures: 1) Two megs and a hemi from Isabella, Puerto Rico 2) meg from Hawaii (Restored) 3) great white from Japan 4) meg from Morocco 5) meg from Cuba (unfortunately stuck on a wood plate but still a lovely display piece) 6) meg from the Phillipines 7) cubutensis from Peru 8) 2 Makos from Mexico 9 & 10) Heavily and horribly restored 5.9 inch Chilean meg (funny story with this one had an even worse restoration on it with made it look no different from a replica, was suspicious and bought it and when attempting a horrible derestoration process and a few slight touch ups of my own a large chilean meg was hiding under the mess, still needs a tad bit of work but I still love I was able to snag a large one cheap in this day and age ) @WhodamanHD Here we go uploaded !
  11. Richard Stauber

    What fossil is this? I looks like a coconut.

    Today, I found this coconut-sized fossil (or just rock) partially imbedded into very brittle (shale-like) cliffside along a hiking trail on Oahu, about 2,000 feet in elevation. The branching pattern along the surface is what caught my attention. At first, I thought it looked like a coconut, but then remembered that coconuts are not actually indigenous to Hawaii. I then press my thumb against the front and a chunk crumbled off, revealing highly defined internal layers. I’m actually a chemist, not a geologist; so I am fascinated, but at a loss. Fossil or not, can anyone help me understand what this might be and how it was formed? Thank you, Richard
  12. bencoulter

    Unknown Bone, Hawaii

    A few months ago, I encountered this peculiar, potential, bone along the shoreline of the Big Island of Hawaii. I noticed it’s porous material, but was puzzled by its overall appearance. I’m not sure if is fossilized or not; however, it is slightly larger then a standard quarter. Thanks for your time!
  13. Found this partial tooth a few years ago in some Holo-Pleistocene marine sediments on Oahu, Hawaii. There is also the chance that it is more recent, as there had been some dredging in the area, though I haven't seen any evidence at this location. Approximately half of this tooth is missing. What remains is half of the crown and one root lobe. It is 17 mm in maximum dimension. My guess is carnassial. Seal? Canid? Appreciate any and all input.
  14. Sarahboone811

    Shark tooth identification?

    My uncle got me this shark tooth necklace from Hawaii but doesn’t know what kind of shark it’s from and I’d love to know!
  15. Antiquarian

    Agatized dinosaur bone

    I have found some different dinosaur agatized bones, some highly weathered, posting here an image, is it before or after jurassic era.
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