Search the Community
Showing results for tags 'stromatoporoid'.
-
I found this along the Fox River in Elgin, IL. At first I thought it was a stromatoporoid fossil (I find them everywhere in this area), but upon closer inspection I couldn't see anything that looked like pillars or laminae. Someone suggested chaetetid sponge, or a stromatoporoid that was distorted by silicification. I can't find any photos that look like my spec. except dino bone and we don't have those in northern Illinois. Is it a natural formation, crazy looking oolites? I'm totally stumped! More pics
-
I drive 8 hours with a friend to a location he remembers from his childhood as yielding a lot. Oh boy it did. 100% worth the drive. Lake Huron, among the agates, pyrite, yooperlite, has some extraordinary Devonian fossils. All fossils were collected from the beach of his family’s property except for the fenestelid bryozoan, which was found at a gas station on the way there. please enjoy this collection of gastropods, petoskey stones, various tabulate corals, crinoids, stromatoporoids, bivalves, Brachiopods, tenteculites, horn corals, an unidentified agatized fossil in jasper matrix
- 2 replies
-
- 8
-
-
-
-
- petoskey
- horn coral
- (and 32 more)
-
These fossil stromatoporoids came from the Traverse formation, Potter formation, Bell Shale, and antrim/dundee formation locations near the north eastern tip of the Mitt in Michigan USA.
- 12 replies
-
- 1
-
-
- stromatoporoid
- sponge
- (and 2 more)
-
Stromatoporids, other sponges, or not a fossil? Thanks!
SilurianSalamander posted a topic in Fossil ID
All collected in gravel and beach rocks from SW Wisconsin. Thanks so much for the help! I love this community:) -
Hey there, me again (since my first ever post had great success)! The photos I am about to show you may depict one or two different animals, found in the Neuville Formation of the Trenton Group (Middle Ordovician). The host rock would be micritic limestone and all pictures were taken in Neuville, 30 km west of Quebec City (Québec Province, Canada). Stratas had a subhorizontal dip, slowly sinking into the Saint Lawrence River. Today, I have 6 pictures showing 6 different specimens. The photos might be showing the same animal, but seen from the top AND the bottom (which- 8 replies
-
- 1
-
-
- stromatoporoid
- red algae
- (and 3 more)
-
Fun weathering forms at a stromatoporoid reef; Silurian, Keyser Formation
SteveE posted a topic in General Fossil Discussion
I visited a well-studied outcrop of the Silurian Keyser Formation in Altoona PA (USA). This is the historic quarry of the Altoona Furnace, right in the town of Altoona PA. Its a big reach for me (a relative noobie) to go through the tech reports and guides and understand it all. But its fun to try. Anyway, on a recent picture only trip, I stopped by one part of the wall with loads of stromatoporoids. I ran into another forum member and her husband a few days earlier up there. And they pointed out some structures on the top of this wall. I may ask a photogra- 4 replies
-
- 5
-
-
- blair county
- pennsylvania
- (and 3 more)
-
I found this while fossil hunting see my post The day I went fishing for fossils. I'm wondering what it is , it's between 4 and 6 inches I guess, didn't have an rule with me at that time .
-
From the album: Lime Creek Devonian Rockford Iowa
Stromatoporoid -
Several days ago I ventured to a Devonian desert locality near Superior, Arizona. I found the largest fossilized coral colony that I have ever found: 2 ft across. A giant Iowaphyllum nisbeti coral was covered over it’s entire length with several inches of a stromatoporoid sponge. I should have taken a photo, but it was not very photogenic; it looked like a white ledge in cross section. First photo is a piece of light colored Iowaphyllum nisbeti coral covered with a medium gray calcitic stromatoporoid coral that is about 8 inches across. The top of the coral is pointed up.
- 1 reply
-
- 5
-
-
-
- stromatoporoid
- arizona
- (and 4 more)
-
I found this a couple of years ago with no resolution or thoughts on what it might be. It is astoundingly close to circular. 6 feet (1.83 meters) in diameter. Dark brown in color but with color variations. Unfortunately, I did not get any close-ups of the orb itself. It seemed fairly indeterminate as to any pattern such as corals might make. The formation it is in is full of crinoids. The brown orb seems to have a radial pattern. Again too dark to get a decent shot while I was there. I am sort of thinking this may be some sort of reef material? Giant stromat
- 13 replies
-
- 1
-
-
- stromatoporoid
- coral
- (and 4 more)
-
This rock has me puzzled. The sides look like they might be the laminae of a stromatoporoid. The top of the rock though, lacks any trace of mamelons and the wavy lines between them that I typically see on stromatoporoids. Instead the rock is full of Cheerios ;-). So I'm wondering if this is something totally different. Maybe geological? Oddly preserved oolites? But then, what are the layers visible on all the rock's sides? Dimension: 1.5" long. TIA to all! Detail of top: Side:
- 9 replies
-
- 1
-
-
- lake michigan
- silurian
- (and 2 more)
-
I picked up this jasper for its banding. Only later, when checking the rock through my hand lense did I discover what I think are a bunch of little rugose colonial corallites at the top and bottom of this rock. If these are indeed corals, all but one lack most detail in the center. If septa are faintly visible, they look differently preserved than on any of my other coral specimens. Mostly it's just circle after circle here, and areas full of "pores". Now that I'm looking at them on my larger screen, the "pores" themselves seem to be corallites - microscopic ones. The black
-
Hi, I spent part of the evening cutting and hand-polishing one of the Devonian stromatoporoids I found this summer and thought I'd share the results. First, a complete specimen (top and bottom of mound): Here is a cut and hand-polished face (multiple grits of sandpaper followed by polish): Here is a view through the microscope. You can see the pillar structure in the layers:
- 6 replies
-
- 8
-
-
- pillar structure
- devonian
- (and 1 more)
-
New to the Forum! Just a rookie looking for some help. This fossil was found just outside of Defiance, Ohio 70 yrs ago. The rock was found on the surface of a farm field, in an area not plowed. Rock is approx 8 inches in length, with its entire surface uniformly covered in bumps. Under magnification, very small crustacean type organisms can be seen embedded in the rock. At first, I thought it may be a stromatoporoid, but bumps on surface may not have enough of a conical shape....? Looking for advice on where in N.W. Ohio this could be taken for ID, if needed.
-
Greetings from Central PA. I'm a total noob when it comes to fossil prep. Today I have a flattish piece, about 10" across and 1" thick. It from a large outcrop of wavy laminations that I believe are from a Keyser Formation stromatoporoid. It's pretty weathered and too hard to tell if pillars are present. So I'd like to try to grind/polish one edge. I have a good collection of metal and woodworking sanders and grinders available but nothing specifically designed for rocks. So my QUESTION IS.... is there a reasonable way to grind/polish the edge of this sample to look for
-
The fossil I am posting today does not contain calcium. I does contain agate and my question is could it be a fossil stromatoporoid or stromatolite or something else?
-
Together with these two coral colonies http://www.thefossilforum.com/index.php?/topic/96001-corals-10-11-from-the-campanian-st-bartholomä-formation-styria-austria-gosau-group-eastern-alps/ I "discovered" also this specimen during my last visit at point 25, east of Kalchberg, in St. Bartholomä. "Discovered"? - I have found this specimen about a year ago, but did not take it with me - "It´s just a mineral". As I have not found much during my last visit, so I took it with me this time... After cleaning, I saw a somewhat faint wavy lamination - "Ah, some kind of calcite deposit"...
-
Hello, I can't seem to ID this fossil found in Silurian reef rock, Chicago area. I made some slices. Any help appreciated.
-
Hi, it's my first post here. I found some fossils like this and asked about this on polish forum and i got help - it's a probably stromatoporoids. On one of them it's a something what looks like stalk. I don't know but probably is only core/internal layers (rest decay). It is possible that something gather inside (alga)? Found in southern Poland - Layer; middle or late jurrasic period. What do you think? (sorry for my english).
-
Please could somebody help me identify this rock I found on the beach. Many thanks in advance.
-
I collected these silicified stromatoporoids from the Devonian, Frasnian Age, Martin Formation north of Payson, Arizona. The spires are 2-4 mm high and have bases 1 to 1.5 mm wide. Hexagonaria and Pachyphyllum corals occur with these. The first photo may be a difference species from the last photos since the spires are lower. Any idea what species these stromatoporoids might be?
-
I e-mailed these pictures to a geologist I know and at first she thought the stridations on this boulder might be from erosion. But as you will see in one of the pictures I post - the lines are running in opposite directions in areas that are concave. The striations "wrap around" this boulder - so although it looks like seashell-type marks, the shells would have had to have been huge as they go completely around the boulder (though admittedly, I couldn't check underneath it). The area is in New Mexico in the Santa Fe Group, Miocene Epoch (7-25 million years ago), with some pliocene patches,
-
Lately if you have seen some of the topics I've started, these trips revolve around an Ordovician reef I came across by the Credit River in Mississauga, Ontario. One of the few things I discovered while exploring these spots is that there are plenty of Stromatocerium sponges which I red is a stromatoporoid. My question is, can anyone lead me to any papers about the growth forms of Ordovician stromatoporoids? I have found specimens of stromatoporoids and from the way I see it, some of the specimens I found of the same species have different growth forms. Some have those things they call monticu
-
Hi, I was wondering if anyone had any thoughts on the ID of these fossil structures. They're found in a fossil patch reef of Bartonian age in Northern Spain, at the moment I am exploring the possibility that they could be very large oysters of some kind, they could possibly be stromatoporoid fossils though (however they don't have any obvious internal layering or structures). Other fossils nearby include small oysters and solitary and colonial scleractinian corals, along with large nummulitid foraminiferans. The layered fossils were very hard, and I was not able to take any samples, inter
-
I have four specimens that could be the same thing, but the appearance is different enough so that I decided to go with separate posts. They came from glacial till in north eastern Maine. The age is most likely upper Ordovician - Lower Devonian, and almost certainly they are marine. My first thought was Stromatoporoid, but they seem a bit too weak in the stromato to me. What do you think ?
.JPG.6e18d89a921328050a1c258a6c508d3e.thumb.JPG.b17c599bacb1b7d515cc87fd4a9beedf.JPG)
