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I'm a mineral collector rather than a fossil collector, but this gastropod replaced by chalcedony has one foot in each camp. It was labeled (by a mineral dealer) "Turritela fossil snail" with a locality given only as Morocco. It'd like to come a little closer taxonomically if I can. Any ideas? Thanks in advance. Edit: Forgot to include its dimensions: 24 mm tall x 15 mm diameter
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Found this coral head today where I’ve found other agatized coral in the Tampa Bay area in FL. To me it looks suspicious, it has a slightly blue color around its edges and has some botryoidal formations on the outside. It’s not super lightweight though, so I don’t think it’s hollow (or completely hollow). Does this look like it’s worth cutting? Is it likely to have any voids or botryoidal formations inside based on other agatized corals you guys have seen? recorded-478291984396.mp4
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New to fossil forum - 1st post! I read info for nubs & tried to follow with clear photos with measurements. I found this (what looks like to me) bone loose in a partially dry creek bed in St Louis, Missouri county. Fossilized with chalcedony? Distal femur?
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Hello I found these near a river in Germany. In the state North Rhein Westphalia in the High Sauerland District. At first I was sure they were Chert nodules, but while examining the larger piece, it looks as if it is two halves. I am thinking now that they are both Chalcedony. Translucent with no bands. The bigger piece is the more interesting piece. It is palm size. The small piece If they are fossils, my best guess is oysters. Thanks.
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I found this piece while walking along a building in Northern Germany...first I thought, "Huh?...this looks out of place"...I thought it was just a weather-worn veiny stone...Then I picked it up, saw the fractures and thought, "Wow!, what a nice piece of Chert or Chalcadony (va. Jasper) what are you doing here?"...The fractures are heavily weather-worn, conchoidial, opaque and with a dull luster... After a while I began thinking that the shape, weathering and banding/striping was a bit unusual (mostly opinion at the time)...I wondered if it might be a fossil...a big Brach maybe? Photos courtesy of the Google ...unlikely After seeing close-ups while cropping the pics to post here, I thought, "Hmmm...I got wood?"... It kinda looks like petrified bark to me now, but its "grainy or veiny" on both sides, which seems strange, to me, for a piece of bark... Probably purely geologic combined with wishful thinking...it happens...although, if it is geology, it would be cool to come across a Genisis Jasper where it should not be Photos courtesy of the Google ...ooops...doin' it again...sry Anyway, either way its a beautiful specimen with an interesting story... Any ideas or opinions?...thoughts will be greatly appreciated...thanks in advance... Have a nice day
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I have this piece of chalcedony that I polished years ago in a tumbler. I always thought inclusions were automatically mineral or geologic but a recent thread said that is not always the case so I am wondering if any of these inclusions are biologic, thanks for your help. Oh and there is also an air bubble (last photo) not sure if that means anything
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Folks on mindat.com suggested asking this question here! This is less of a "what is this a fossil of" question and more of a "is this possible" question. I have a small chip of translucent chalcedony showing a mass of white inclusions, two of which look very much like a grass seed-head. The gist of the conversation so far has been 'is it possible for fossil material to be an inclusion within a silica mineral like agate or chalcedony?' As opposed to an agate-replacement or opal-replacement fossil like an agate limb cast, agatized wood or agatized/jasperized opaque mudstone with intact fossil imprints of leaves and fish. Because pseudo-fossils in chalcedony are so common, with organic-appearing moss, dendrites and "garden" quartz mislabeled as fossil material all the time, there is a knee-jerk reaction of "never." But, am wondering... is it mechanically impossible or just highly uncommon? It has been suggested it may have formed in association with a mineral-rich hot spring, first as opal, then as agate. This was found in the John Day basin, Antelope/Ashwood area of central Oregon, in a drainage downslope from a 15-square mile basin that is ringed with lahar palisade formations (think Clarno palisades from John Day Nat. Monument.) The area has standing agatized tree trunks 5 feet high and 2 feet thick, and is full of smaller petrified wood and plant fossils. Age is 30-40 million years, in an overlap between John Day and Clarno formations. Private property, with permission. Apologies for the quality of the photos, am taking pictures with a phone through a hand lens.
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Hi guys! I am looking for new areas to hunt for rocks and fossils around the KC area. I have been to the Blue river, Kansas river, Cedar creek, Tuttle creek, Perry Lake, Mill creek, and abandoned quarry areas. Anyone have any general locations of where I can find some stuff? I am an avid hunter for all sorts of fossils and rocks (rockhounding is my favorite past time)! I've had the most luck at the Kansas river and Perry lake. Some of my finds include cow skulls, cone coral, shells, agates, vertebrae, and a bunch of druzy quartz geodes and chalcedony. I have included pics of some of my finds - the petrified wood was sanded down and polished up to 3000 grit. Any suggestions are GREATLY appreciated!!!!! Much love KC!
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I have some, what I believe to be, calcareous tufa. I will be posting photos of different specimens over multiple posts and days. All specimens are in partially composed of botryoidal chalcedony. My main question has to with the fact that botryoidal chalcedony is a known pseudomorph in marine fossils. Many of my specimens look like they could be stromatolite-ish or algae-like. Does anyone have knowledge or experience with botryoidal chalcedony and its association with fossils? Can stromatolites or algae sediments become pseudomorphed into botryoidal chalcedony? The calcareous tufa rock that I will post in this message is definitely fossiliferous. You can plainly see three small marine fossils on the bottom-side of the fossil (What might they be?). Two are casts and one is a mold. Generally this rock is "bowl-shaped" overall with a convex top and a concave underside. The rock's top surface is covered with botryoidal chalcedony. There is a smaller amount of botryoidal chalcedony on the underside. Could the botryoidal chalcedony be a psuedomorph fossil? The first photo (#1) shows the rock's upper-side; The second photo (#1B) shows the underside; The third and fourth photos (#1C & 1C-2) are the same fossil object (cast, about 0.5 mm): The fifth and sixth photos (#1D-1 & 1D-2) are the same fossil object (cast, about 1 mm): The seventh and eighth photos (#1E-1 & 1E-2) are the same fossil (mold, about 1.5mm):
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Sometimes, when you go on a fossil hunt, you find more than just fossils. Some friends and I traveled to southeastern Iowa in Spring '18 to scour the Mississippian for fossils, but while there, we noticed that many of the homes that we drove by sported geodes in their front yards. Intrigued, we decided to investigate for ourselves. As it turns out, the area is well-known for its geodes (Iowa's state rock is the geode), so we promptly decided that we had to collect some for ourselves. We eventually found a privately owned piece of property where we could fill a bucket with geodes for about $20, descended upon a stream cutting into the bedrock, and filled a bucket in short order. Then, on a return trip to Iowa a month later, we found another outcrop of geodes along the Mississippi River. Once again, we collected handfuls. Then, once we got back, we split them with a geode cracker. They varied in quality; some were stunningly beautiful, and others were less so. They were filled with all manner of minerals: some had chalcedony fillings; others had quartz crystals, and still others had minerals that I didn't recognize. The colors varied, too: pink, white, light blue, red, and brown. As it turns out, we were a little overzealous in our efforts; we collected about 50 pounds of rocks. We've given them away to as many friends would like them and have only just now run out of them a year later. Pictured below is a fraction of the haul. If you happen to find yourself in this neck of the woods, then remember: the Osagean of Iowa and Illinois has more than just crinoids. If you would like more information on them, where you can hunt for them, or even the annual Geode Fest, then check out this link. http://keokukiowatourism.org/geodes/index.php
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Hello all! I am new to this forum and just started getting interested in rocks and fossils. I went out to Wyoming last weekend and found a lot of really nice agates and fluorescent minerals but I also came across what look like some pieces of chalcedony with these white tubular inclusions in them. I first just saw the shell imprint in the rock so I pocketed it, but later when I looked closer noticed the white webbed tubes. I posted these pictures on reddit in r/fossilid and got a few responses telling me that they are Bryozoans. I looked this up and it looks right to me! My question is this...all of the pictures of fossilized bryozoans I have seen look very traditional (in sedimentary rock). Is it usual to find them embedded in silicate like this? I cannot find one other example of this on the internet which makes me think that maybe this type of specimen is called by a different name and that I am just not searching for the right thing. Anyways, any help and insights would be much appreciated! I am going back out to Wyoming this weekend to search some more and would love to know exactly what it is I am looking for! Thanks in advance for any responses! Erik
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I don't know if this is the best category to post this under, or should it go under 'Member Collections' as the items are now part of my collection... A week ago already (Saturday), a couple from the local rockhounds had a garage sale. I think much of the material belonged to the club as these folks had been hosting the club's workshop equipment and it was being moved out to a new place. They said "There are some fossils"... but couldn't say what kind. Unfortunately they couldn't tell me much about the locations, not being fossil people who are careful to record that sort of info. This is the same guy who told me where I might find the source of my possibly-local (Vancouver Island) trilobites that I posted some years ago. I tried pressing him for a clearer idea but I'm hampered by poor maps. I got a slightly better idea but everyone's telling me the gates are always closed now to these backcountry locations and the club looked into getting a key but found out it would cost $1000+ and whatever else. Very frustrating. How am I supposed to solve the mystery now?? Anyway, here's what I got. Nice little Glyptostrobus(?) frond. No location given but it looks like the kind of thing we find around here in our Upper Cretaceous Nanaimo Gp but the rock is a little different than what I'm familiar with. Nice specimen anyway.
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The Peace River is a magic place, It always has surprises in store, even when I am finding little that is Spectacular!! Look at this selection found while hunting today. Some NICE Hemis, a flake from tool making, even a wild boar tusk (hollow inside and modern) and then The botryoidal translucent brown mineral growing on the fossil is chalcedony. Chalcedony often fills the empty spaces in fossils, especially wood and bone. Did I mention a calcified sea urchin spine .. NEAT !!! Even got 1 Meg (very 1st find of the day), and a couple of calcified Barnacles.... I have never found a calcified barnacle in 10 years of searching this river... I love the diversity of finds... something new i every sieve. And the water was cool and the sun was shining.
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Found this on a desert walk southwest of Tucson, Az. Cool find.....is it possibly some kind of fossil, perhaps a fossilized structure similar to septarian formations, or just a cool looking little rock? Thanks for any and all help.
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I found this today on the beach under a clay cliff, it is known for agate And chalcedony to be found on this beach, what would I call this, it looks like some sort of a bone maybe?
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A trip to Haute Normandie (France) cretaceous cliffs ( The plasterers' balad )
elcoincoin posted a topic in Fossil Hunting Trips
A trip to Haute Normandie cretaceous cliffs ( The plasterers' balad ) - Part 1 During three days we travelled along the Haute Normandie coast. The area we ventured in is cretaceous : cenomanian (-99 MA), turonian (-93 MA) and coniacian (-89 MA), following the west to east dip. Day 1 : Antifer We met in Saint-Jouin de Bruneval, on the beach parking lot next to the oil terminal. We started the trip at 9 am, so we could hike quite far before the tide would stop us. Sky was shiny and quite fast the temperature started to rise. We mostly spent the morning looking for fossils in cenomanian boulders and chalcedonies among the peebles. We let the tide lock us and made a break for a picnic and a nap. Once the tide let us, we started again to look for fossils, under a scorching heat. At about 6 pm we made our way back to the cars. The beach which was empty in the morning was now overcrowded. We mostly found some irregular echinoids : crassiholaster and catopygus (some with a really nice preservation), some brachiopods, some bivalves (most fragile) (including nice rastellum) and 2 shark teeth. Here's a geoligical presentation of the area (in french unfortunately) http://craies.crihan.fr/?page_id=13478 Some of my finds on that day : heres a link a my flickr galery for the whole trip : https://www.flickr.com/photos/48637020@N06/albums/72157682540354264 Crassiholaster subglobosus Crassiholaster subglobosus Crassiholaster subglobosus with a smal bivalve print Catopygus colombarius more to come soon...- 11 replies
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Fossils and Fossilized Artifacts from The Discovery of Istanbul Paleolithic Culture
Deryavar posted a topic in Fossil ID
Chould this stone be a fossilized toe bone of a big animal? The first photograph is top view, the second is flashless angled top view. We have a lot of Agatized and Partially Agatized Bones. They are translucent chalcedony. But this part is not chalcedony. It may be at the first stages of the fossilization.- 12 replies
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Online Lexicon and Bibliography for Agates - Up to 2007
Oxytropidoceras posted a topic in Rocks & Minerals
Below are the URLs to a lexicon and bibliography for agates that is current up to 2007. Agates http://snr.unl.edu/data/geologysoils/agates/index.aspx https://web.archive.org/web/20170227151516/http://snr.unl.edu/data/geologysoils/agates/index.aspx Agate Bibliography http://snr.unl.edu/data/geologysoils/agates/agatesbibliography.aspx? http://snr.unl.edu/data/geologysoils/agates/agatesbibliography.aspx?firstletter=A https://web.archive.org/web/20170227145052/http://snr.unl.edu/data/geologysoils/agates/agatesbibliography.aspx?firstletter=A Agates Lexicon http://snr.unl.edu/data/geologysoils/agates/agateslexicon.aspx? http://snr.unl.edu/data/geologysoils/agates/agateslexicon.aspx?firstletter=A https://web.archive.org/web/20170227150237/http://snr.unl.edu/data/geologysoils/agates/agateslexicon.aspx?firstletter=A Agate Glossary http://snr.unl.edu/data/geologysoils/agates/agatesglossary.aspx https://web.archive.org/web/20170227045740/http://snr.unl.edu/data/geologysoils/agates/agatesglossary.aspx University of Nebraska - Geology and Soils http://snr.unl.edu/data/geologysoils/index.aspx https://web.archive.org/web/20170215055749/http://snr.unl.edu/data/geologysoils/index.aspx Yours, Paul H.-
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I found what I thought was originally a giant superior agate. After cutting it and didn't see any fortification I labeled it common Chalcedony. Then I read an article about Coprolites in my Rock & Gem mag. and they had a carving that looked exactly like the inside of my.. what I thought was chalcedony. Being more of a rock guy than a fossil guy I thought I would try and get some expert advice on its identification. Here is why I think it might be coprolite. 1. superior agates are formed inside of basalt cavities and weathered out which leaves impressions on the outside.. (none I could find that looked like other agates) 2. there looks to be insect burrow holes like something may have bored in at one time and after it mineralized left a bit of druzy quartz in the burrow holes. (can only see with eye piece) 3. there is a slight flat spot like it had been sitting for some time undisturbed prior to mineralization. These were some of the things I read in the article that had me second guessing what I had found. I found the piece along a lake bank that had eroded a bit due to receding ice. This is in Buffalo, (Wright County) Minnesota. Thanks. one pic is whole, the rest I cut in half and polished one side to try and enhance the view on the inside.
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Some years ago while exploring New Mexico's Basalt/Rhyolite deposits, which are scattered over the western half of the State, we found some chalcedony of unusual character. We called them "Gel Agates" or "Rosettes". I sent to Terry Moxon in the UK who is studying Agate Formation some samples. He needed some to grind up and do a number of tests on them at Cambridge University. He also publishes books on "Agate- Microstructure and Possible Origin" and "Studies on Agate- Microscopy, Spectroscopy, Growth, High Temperature and Possible Origin". I was curious as to the age of formation, which worked out as the Oligocene, 35,000,000 to 38,000,000 years. Other "agate authors" are Roger Clark "South Dakota State Gemstone- Fairburn Agate" and two or three with similar titles. Roger Pabian "Banded Agates- Origins and Inclusions". Thomasz Praszkier and a beautifully illustrated "Agates from Ploczki Gorne, Lower Silesia, Poland" offered for sale by the author at the 2013 Tucson Rock Show. I enjoy these as they are concerned with the Formation of Agates, which includes Chalcedony and its various forms. If you have not already researched Agate/Chalcedony formation... It is still quite a mystery. The majority of specimens were a "gel" for some time and then, for some reason yet not known... they solidify... permanently. There are "high and low temperature" forms. They may form differently and solidify differently... but the process of the deposition and hardening (if it takes minutes, years, or...) is still in dispute. Agates fall into a range of geologic ages. People collect some from the OLDEST to YOUNGEST. Some agate/chalcedony was reported, I saw a barrel of them at Tucson 2012, from a volcanic ash less than 1,000,000 years old. They looked like the ugliest round walnut sized pieces of silicates to be called chalcedony at 50 cents each. I did not want one, but passed the word out to the Agate researchers. For agates/chalcedony this was like giving birth for age. I gave Terry Moxon the name of the collector/dealer. Terry wanted to know a more specific location and a sample of the volcanic ash/tuff they were being found... and to purchase a number of specimens. SILENCE from the dealer. From what I knew about the location, not Arizona or New Mexico, I found the only volcanic ash/tuff deposit in the area, which was on private property. I have not asked Terry if any progress was made, but this could have been the youngest specimens on RECORD! A baby at a million years old. Now, back to my impromptu "Guided Camping Trip". I kept my site(s) SECRET since our discovery. I wanted to map out the finds and collect specimens. I learned some specifics where these occur and where they do not. I was not into the technical origins side of the hunt, but to collect the odd variety of specimens that occurred in different locations. It has been 7 years now and when I came across the Fossil Forum... and a Rocks & Minerals forum... I thought it over and would be willing to have an AUCTION for a small group to be introduced to this special occurrence of chalcedony. I refer to them as New Mexico Gel Agates as they appear to have been wax dripping, buttons with concentric rings of formation, flows like in a cavern of calcite and gypsum, globs and flows. If you look at one specimen closely, it looks like a candle melted and formed "tulips", cups and forms that only could fit into small open bubbles and seams is volcanics and tuffs. They can be 1/4 inch to 7 inches across and some are flat like pancakes or have an inch or two of relief. A friend said he would put some on ebay and if they would sell. He wanted some large showy specimens... but when you have them... you will find it hard to part with them. If you hunt them, you will understand. When the first ones were put onto ebay, no bids... BUT another New Mexico site began to offer specimens that were freshly quarried from a claim in the SAME wonderful shapes, just not weathered out on the surface... but being mined for $75 to hundreds of dollars per specimen. They are absolutely beautiful... natural treasures. (I will stop this part of the post and complete this on a second post so I do not lose this text.)
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From the album: Adventure is an individual thought!
These are the most unusual chalcedony forms to find in the World. Here is one laid upon some pine needles. Some spots will have so many, you will have to pick only the most interesting ones! Have a collecting bag around your neck to put them into it. Have a walking stick to hike with, do some prodding in thick pine needles. We have seen some rattle snakes, actually one, but it was nearly five feet long a Basalt ridge. Just be aware. Wonderful camping. Well maintained roads. Gasoline, groceries and water to be found in Reserve. On a map draw a fifty mile circle and you are just beginning to find places to hunt. Most are to the north, east and west of Reserve. The locals will help you figure out where to begin.-
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From the album: Adventure is an individual thought!
This is a typical flat to find loose chalcedony. There are areas of Basalt and Rhyolite that you will find the sources of all of the agate and chalcedony. Once you understand lava flows from the Oligocene volcanics... you are on your way to finding the most unusual chalcedony in the world. Step into a Forest Service Office, get the large scale Forest map(s) you need, inquire as to where a good area to begin looking might be... and you are on your way. Make sure you mark where you camped... so you can find it next time and finish looking over the beautiful hillsides. -
From the album: Adventure is an individual thought!
Have your dogs pack the water into the back country and pack the finds back to camp. There are so many areas to find agate and opal that you just find a nice camping spot and begin to prospect by walking... and walking... and walking. Even "Apache Tears" can be found north of Snow Lake. Bring a bag to carry them. These are the size of a dime to quarter. The dry creek beds and hillsides are a good place to start... north of Snow Lake are some nice camping spots and the hills further north have the Apache Tears washing out in the dirt roads!