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...also oncolites, thrombolites, microbialites, related things can be included. We can also include BIFs (Banded Iron Formations) and suchlike, being indirectly created by early life, but there will be a preference for biogenic stuff.

I don't think this topic has been started already (I would have thought it has), so it falls to me. If one already exists, maybe this can be merged with it and I'll edit accordingly.

Some of us have been showing each other our stromatolite finds/acquisitions in other topics and it seemed like a good idea to make a central depot. Links to preexisting posts are welcome, if you don't want to make duplicate posts here.

I'll start it off with some of mine. I did a photographing blitz and then finally got done editing them. Some of the slices have not yet been polished, so I had to photo them wet, though some wouldn't hold the water so I gave up and photo'd them dry.

 

First, my Australian examples...

 

Apparently this one is (mid?) Cambrian, from the Barkly Tableland of the Northern Territory, west of Camooweal, Queensland. I like that it has some of the natural eroded surface as well as the sliced (and thankfully polished) surface:

Australia(2).thumb.jpg.43753ff8662865115e3c92cb2723001b.jpgAustralia1.thumb.jpg.ec67e4c09d308d4728038ee920b71019.jpg

 

I wish this piece were bigger. It must have at one time passed through the hands of that dealer in England who chops everything up into small pieces to maximize profit, but I don't know.   Earaheedia kuleliensis, Paleoproterozoic/Statherian (~1.75 b.y.), Kalele (Kulele?) Limestone, Wiluna, Nabberu Basin, Western Australia:

Earaheedia.thumb.jpg.988672edc2b3b91b192e354a365a36fb.jpg

 

I doubt this one is technically a stromatolite or microbialite - just layers (varves?) of BIF sediment, but it did exist at a time when there was single-celled life on Earth, pumping oxygen into the seawater, turning iron suspended therein into iron oxide which precipitated out to form the Banded Iron formations. And anyway it's too cool to not include.

The rockhounds refer to this stuff as 'Snakeskin jasper'.  2.45 b.y. (Paleoproterozoic/Siderian), Weeli Wolli Fm (Hamersley Group), Turee Creek Station, SW of Newman, WA. (Pilbara Region)

903824455_Australia-snakeskinjasper.thumb.jpg.b228c819506c6ad6916593cea3f16549.jpg

 

A couple more BIF pieces from Australia, just because it's so interesting and indirectly biogenic...

Rockhounds refer to this stuff as Tiger Iron (ie. Tiger-eye in Banded Iron). I understand there are 2 different locations: the Ord Ranges/Port Hedland location (Cleaverville/Nimingarra Iron Fm, Mesoarchean 3.02-3.1by) and the Marra Mamba/Brockman location (Marra Mamba Fm, Neoarchean 2.6by), both in the Pilbara Region of Western Aus, but I'm not sure how to tell which one this might be from. I lean toward the former as the latter is apparently less common. If anyone has more expertise on this I would appreciate a tip. The Tigereye is a pseudomorph (replacement in silica) of selenite growths in the sediment after deposition, if I'm not mistaken? I need to check that to be more confident.

Australia-TigerIron.thumb.jpg.226aa5bf91ec02acbe3dce8272788516.jpg

( wet ^ --- dry v )

1307845766_Australia-TigerIronNo2.thumb.jpg.6dab2145dd1ec248c2d4255cec6a21e3.jpg

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This is a recent acquisition and I have shown it elsewhere...

'Cotham Marble', Upper Triassic (Rhaetian) Penarth Gp, Lilstock Fm, upper part of Cotham member, Cotham area, Bristol, Somerset, England:

CothamMarble.thumb.jpg.100658121695b175c785e57536b01597.jpg

 

This is another arguably non-biologic piece, at least not a stromatolite. I have read that there are chemical signatures of life evident in this stuff, and structures that look stromatolitic but it is debated as to whether they are, or just abiotic sedimentological features. Either way this would be the oldest known rock to contain evidence of life on Earth, and the oldest piece in my collection so far so I had to include it. You'll notice there is little/no iron oxide (rust) color to it like there is in the BIFs above (though it contains iron, you can see it and feel the weight), because there was virtually no oxygen in the sea/air at that time. But reportedly there are Carbon isotope ratios in this rock that suggest the presence of early life.

'Isua stone' (Banded iron), Isua Greenstone (supracrustal) Belt, Isukasia Terrane, 3.7billion (Eoarchean, aka Isuan), ~150km NE of Nuuk, Greenland:

Isua.jpg.9d18355eee8f5f28b8cca576afca1bbc.jpg

 

Okay, now some real stromatolites...

This one came from the Grand Canyon South Rim, Salt River, Arizona. That's all I know about it and would like to know more (specific location, age, formation, if possible!):

GrandCanyon.thumb.jpg.ffa8c1e78ac464d6d78e90cdd35d107c.jpg

(Photo'd wet.  Color adjusted - I was photoing in the sunlight but the settings I was using seemed to give a reddish tint to the pics, but better than the wrong settings under incandescent or fluorescent lighting!)

 

These two were sold to me as stromatolites. It does have fine bedding with a small-scale 'wiggly' look to it, so to me it seems reasonable to assume it is a strom, esp. as stroms are known from this area/formation. The smaller one came as a bonus with the larger one. (2 views of the larger, 1 of the smaller)

~1.4-1.47 b.y (Mesoproterozoic/Calymmian), Mt Sheilds Fm? (=1.41-1.443by), Missoula Group, Belt Supergroup... Between Troy and Libby, NW corner of Montana:

Montana.thumb.jpg.9cd595f152f161aef1d974d3dbb53fc6.jpgMontana(2).thumb.jpg.6502e6d81c8eb46e3e2ef9b5fe7f12a8.jpgMontanaNo2.thumb.jpg.6f91116c3046ec07cd0afbe41238fb10.jpg

 

This one I collected myself less than 2 years ago, along with several other pieces, from a site in the BC Kootenays. This is probably the best example, showing a large 'dome' (3 views), but I could take pics of more pieces if anyone is interested.

Same age and supergroup as the above pieces from Montana but on the Canadian side of the border where it is called the Purcell Supergroup. I'm not sure of the formation. At ~1.4 billion these are more than twice the age of the Ediacarans and almost 3x Burgess Shale, which is mind-boggling enough, but nowhere near the oldest stromatolites around (see above and below)!

Kootenays.thumb.jpg.febe645f6d65392e7d9d8f6adb3a0540.jpg

Kootenays(2).thumb.jpg.1d08a360e86004cb0ae6a9518a277652.jpgKootenays(3).thumb.jpg.a90fe3366012630f06255fd65036fa84.jpg

(top of dome surface to the fore)

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I've gotten hooked on the Mary Ellen stromatolites from Minnesota, as they are some of the more attractive and varied, and old, and not too hard to get (By contrast, try pricing some of the Australian and Russian stroms).... So I've got several of these. Some of you probably have better examples but they're all different so it would be difficult for me to let go of one to get another.

I believe these are all referred to as Collenia undosa, and I believe they're all from the same site (Mary Ellen Mine), but correct me if I'm wrong. Paleoproterozoic 2.2-2.4b.y. (or 1.8?) Biwabik Iron Fm, Nash Fork shear zone, Mesabi Range, St. Louis Co, Minnesota.

This might be my best one, with columnar strom growths:

MaryEllen-bigredpiece.thumb.jpg.a24a0b483657b5954904870a870eff68.jpg

(cut surface, wet)      Not too impressive on the outside:

MaryEllen-bigredpiece(2).thumb.jpg.f5ac5e48f4a179497631acee58a8363e.jpg

 

Another nice red columnar piece:

MaryEllen-redcolumnar.thumb.jpg.254e524d68cb053b06e4f2591ff395f8.jpg

(cut surface, wet)       Again, rough surface is rather unassuming and you might pass over it as a piece of jasper if you didn't know better:

590247421_MaryEllen-redcolumnar(2).thumb.jpg.02f2c802212ce9ba5261dd9dd32d441f.jpg

 

Brecciated piece with hematite(?) grains or oolites(?)

MaryEllen-brecciatedNo1.thumb.jpg.07912ad8c8698821428736bc372c67d7.jpg

(cut surface, wet)

 

Another brecciated/thrombolitic/oncolitic piece - one dome structure in the middle:

1725356965_MaryEllen-BrecciatedNo2(1).thumb.jpg.06a2be4c8c7be8336e2138fc3f92e2b4.jpg1655626360_MaryEllen-BrecciatedNo2(2).thumb.jpg.33fedec4925c13a0222ac66e5d343d56.jpg262849554_MaryEllen-BrecciatedNo2(3).thumb.jpg.0fd517874fade2d0178a60cfaf3581a0.jpg

 

A smaller piece of the red columnar stuff sliced through the columns laterally:

1741801499_MaryEllen-redcrosscut.thumb.jpg.aff686aff7895d909fcf0ddca3af9865.jpg

(wet)

 

This one is more multicolored:

MaryEllen-multicolored.thumb.jpg.3c9c44340a97101788efb3b5bfac2843.jpg

(sliced surface, wet  ^   ....     rough surface, dry:)

MaryEllen-multicolored(2).thumb.jpg.84fe7c64feb82bb960bc7e80bdd7087d.jpg

 

Some is green... I'm told the green stuff is more solid and easier to work, while the red stuff is more prone to fracturing but is more desirable for lapidary...

(sliced/wet...  rough/dry)

MaryEllen-greencolumnar.thumb.jpg.6ae59b2ec5ab0099e15be53fc20b20c0.jpg

MaryEllen-greencolumnar2.thumb.jpg.f31a0fc4c48b99ea51d2e4e68a218426.jpg

 

One more, a green piece with some white and an interesting variation in the growth pattern (slice, dry):

MaryEllen-greenzigzag.thumb.jpg.2ed93b52f9f444da8f3763f8cd9318ae.jpg

 

All for now.

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Very nice collection there, old chap.:)

I have a couple but only photos of one at this time. Thanks to Ralph, @Nimravis for this beauty. 

My pretty little piece of Collenia undosa from the Mary Ellen Mine, though the age I had was 2.11 billion years old. :shrug:

Collenia.jpeg.34beea3eeb50c30a35b36a3feac9b89c.jpegCollenia1.thumb.jpg.6247fae74f5ef383c8f54d4308aaf0f6.jpg

Collenia2.thumb.jpg.4138e459a2c78f64ce3e05f13d76be5f.jpg

 

I have a piece of Cotham Marble somewhere and something from the Oligocene, I'll have a look about. I lived in Cotham for a year. 

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Nice Stroms!!! Mary Ellen type are listed anywhere from 1.8 to 3 billion years old, only a small variation of 1.2 billion years!!! My goal in the next few years is to head north on a fishing and fossil hunt in hopes of finding one of these.

 

 Mike

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Thanks guys. Yes, I see various dates for the Mary Ellen.... not sure what the latest thinking is, but whatever.

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11 hours ago, minnbuckeye said:

Nice Stroms!!! Mary Ellen type are listed anywhere from 1.8 to 3 billion years old, only a small variation of 1.2 billion years!!! My goal in the next few years is to head north on a fishing and fossil hunt in hopes of finding one of these.

 Mike

I hope you do!

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@Wrangellian, if I hit paydirt. Let me rephrase that. WHEN I hit paydirt, I still have your Grandmother's or Aunt's address.

 

 Mike 

 

"Yes, I see various dates for the Mary Ellen"  .........        I think the formation may span close to 1 billion years, so stroms likely existed a long time in that sea.

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I have two curio cabinets that contain stromatolites, oncolites, thrombolites, microbialites and various other potential biogenic pieces.  I’m still adding pieces to them.

 

 

1823027658_CurioCabinet1.thumb.JPG.c31d9eb38d66b7998c104f69465fd77a.JPG     1030818044_CurioCabinet2.thumb.JPG.262cb7fbe6a12261151d57890d05d03a.JPG

 

 

I started posting some pieces in two TFF threads at the below links:

 

http://www.thefossilforum.com/index.php?/topic/113005-stromatolites/

 

http://www.thefossilforum.com/index.php?/topic/112932-oncolites/#comments

 

I have a lot of pictures, and I’ll start adding some specimens to this thread like the piece below.

 

Conophyton amantourensis slab from the Precambrian, Vendian 650 million years ago, from Quarzazate Tiouin Amane Pond, Amane-n Tourhart Location near Quarzazate, Ant-Atlas Mountains, Morocco (992grams 7x7.25x.375 to .75 inches):

 

 

449984698_44ConophytonamantourensisPrecambrianVendian650millionQuarzazateTiouinAmanePondAmane-nTourh-rzazateAnt-AtlasMtnMorocco992g7x7_25x.375to.75inches1.thumb.JPG.f3b5dfad0d45f5c5ce5cbd80c05ff36e.JPG

 

1444874489_44ConophytonamantourensisPrecambrianVendian650millionQuarzazateTiouinAmanePondAmane-nTour-rzazateAnt-AtlasMtnMorocco992g7x7_25x.375to.75inches2.thumb.jpg.9a18de6325ab285f6b38b51522129bde.jpg

 

1464600592_44ConophytonamantourensisPrecambrianVendian650millionQuarzazateTiouinAmanePondAmane-nTour-rzazateAnt-AtlasMtnMorocco992g7x7_25x.375to.75inches3.thumb.jpg.a856820c49c0119e12c60a0987a17641.jpg

 

781684861_44ConophytonamantourensisPrecambrianVendian650millionQuarzazateTiouinAmanePondAmane-nTourh-rzazateAnt-AtlasMtnMorocco992g7x7_25x.375to.75inches4.thumb.jpg.8f970e68331cbeb8bdba5aed4cd816c6.jpg

 

886533923_44ConophytonamantourensisPrecambrianVendian650millionQuarzazateTiouinAmanePondAmane-nTourh-rzazateAnt-AtlasMtnMorocco992g7x7_25x.375to.75inches5.thumb.jpg.05b44a561f82152b092bdfb427b78637.jpg

 

65113201_44ConophytonamantourensisPrecambrianVendian650millionQuarzazateTiouinAmanePondAmane-nTourha-rzazateAnt-AtlasMtnMorocco992g7x7_25x.375to.75inches6.thumb.jpg.ca69734b9ec63cb5623f5e6fd0b54f70.jpg

 

Marco Sr.

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"Any day that you can fossil hunt is a great day."

My family fossil website     Some Of My Shark, Ray, Fish And Other Micros     My Extant Shark Jaw Collection

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I have a couple of stromatolites, but they're measly in comparison to those above. 

 

Here's one from North Texas, likely Late Cretaceous in age:

 

stromat.thumb.jpg.ff259439d3431390938859aa7815fb26.jpg

 

... and a small section of a Strelley Pool stromatolite from Pilbara, Australia:

 

FullSizeRender.thumb.jpeg.79c47a8eb642f6828c9fbc652dc69d03.jpeg

 

... certainly my oldest "fossil" at ~3.43 billion years.

 

I also have a couple of tumbled BIFs from South Africa, but they're not much to look at:

 

IMG_2246.thumb.jpeg.87046394ee032c85f8fef033dfbaf81e.jpeg

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"Argumentation cannot suffice for the discovery of new work, since the subtlety of Nature is greater many times than the subtlety of argument." - Carl Sagan

"I was born not knowing and have had only a little time to change that here and there." - Richard Feynman

 

Collections: Hell Creek Microsite | Hell Creek/Lance | Dinosaurs | Sharks | SquamatesPost Oak Creek | North Sulphur RiverLee Creek | Aguja | Permian | Devonian | Triassic | Harding Sandstone

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3 hours ago, minnbuckeye said:

@Wrangellian, if I hit paydirt. Let me rephrase that. WHEN I hit paydirt, I still have your Grandmother's or Aunt's address.

 

 Mike 

 

"Yes, I see various dates for the Mary Ellen"  .........        I think the formation may span close to 1 billion years, so stroms likely existed a long time in that sea.

:yay-smiley-1:  Well my aunt no longer has that address so I'd have to give you my own... but I hope you are able to access some of that material whether you send any to me or not! Or is it all claimed, pay-to-dig, or what?

 

I would be surprised if any one rock formation spanned a billion years - I'm not ever sure that's possible, without changes in deposition and so on that enable to sequence to be divided into different formations/groups/etc, and the red/green Collenia unit itself is surely far less than a billion, probably less than 10 million if I were a betting man.

 

 

2 hours ago, MarcoSr said:

I have two curio cabinets that contain stromatolites, oncolites, thrombolites, microbialites and various other potential biogenic pieces.  I’m still adding pieces to them.

...

I started posting some pieces in two TFF threads at the below links:

http://www.thefossilforum.com/index.php?/topic/113005-stromatolites/

http://www.thefossilforum.com/index.php?/topic/112932-oncolites/#comments

I have a lot of pictures, and I’ll start adding some specimens to this thread like the piece below.

Conophyton amantourensis slab from the Precambrian, Vendian 650 million years ago, from Quarzazate Tiouin Amane Pond, Amane-n Tourhart Location near Quarzazate, Ant-Atlas Mountains, Morocco (992grams 7x7.25x.375 to .75 inches):

Marco Sr.

That's a drool-worthy collection and nice display if I ever saw one!

 

 

1 hour ago, ThePhysicist said:

I have a couple of stromatolites, but they're measly in comparison to those above. 

Here's one from North Texas, likely Late Cretaceous in age:

... and a small section of a Strelley Pool stromatolite from Pilbara, Australia:

... certainly my oldest "fossil" at ~3.43 billion years.

I also have a couple of tumbled BIFs from South Africa, but they're not much to look at:

A small collection but good specimens... The first one has lots of character, and the second is (for far) the granddaddy of all stromatolites and I still don't have a piece!

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Fantastic array of Stroms :envy:

Here is my Mary Ellen Jasper 

Will add some others once I have photographed them 

BCEA712C-8246-46BB-BD3B-70E6CE5C33F8.jpeg

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It has come to my attention that there was also a Show us your Algae topic, which I had forgotten all about. I didn't think to search for an Algae topic when I was looking for an earlier Strom topic.

 

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This is my Cotham Marble 

 

 

9D4C8B64-3FEA-4F04-A9AE-2F8F0D5A7522.jpeg
 

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Beetroot Stone 

Solenopora jurassica

Cirencester, Gloucestershire, Uk - White Limestone Formation 

Middle Jurassic - 165 m y

 

 

B665983A-AFD2-4A16-8B19-A5F3386B60A6.jpeg

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My Oligocene stromatolites from the Plaine de la Limagne, France. 

Possibly from a freshwater lake.

20210511_111755.thumb.jpg.b584786203d2f82e0167afed6449d261.jpg

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On 5/8/2021 at 6:09 AM, Wrangellian said:

Yes, I see various dates for the Mary Ellen.... not sure what the latest thinking is

 

 Here is what I came across from a paleontologist that puts out a blog "Rocky Ventures". 

 

Over 2 billion years ago in the Proterozoic Era, among the first organisms were blue-green cyanobacteria (Collenia undosa) that have evolved from the ancient seas. They harvested solar energy to process carbon dioxide via absorbing carbon for continual growth, and releasing oxygen as a byproduct. At this time in Earth’s history, the atmosphere was devoid of oxygen (less than one percent) and the slow buildup of an oxygenating environment, that all multicellular life can attribute its existence to, all started from these interesting critters. The bacteria would trap muddy sediment, washed in from rhythmic shallow tidal currents, by secreting biofilms. In order to access precious sunlight, the bacteria would mobilize upward resulting in building layers that would create stony colonial mats that we know of as stromatolites. It is also interesting to note that these layers are rarely planar; the curvature, or sinuosity, of these layers is a result of the bacteria wanting to face the sun at all times despite its changing position throughout the seasons.  As a result of this phenomenon, scientists have used stromatolites to determine how the number of days per year has changed throughout earth’s history. At the time of primary iron ore creation, the planet’s rotation was significantly faster giving a whopping one thousand-plus day year! Once thought long-extinct, scientists discovered these “living fossils” in the southern end of Shark’s Bay, Western Australia in 1956. This alone is a testament of their adaptability through stark environmental changes and multiple mass extinctions.

As significant as their contribution to changing the atmosphere into a more livable state was, new oxygen was not immediately available for this role for at least another 100+ million years. At that time, Earth’s crust and oceans were loaded with iron and other readily oxidizable elements. This led to the creation of major iron ores that populate northern Minnesota, Wisconsin, Michigan and other locales. Some of the trapped sediment within some stromatolite mats oxidized into hematite (Fe2O3) and magnetite (Fe3O4), thus starting the creation of the jasper at around 1.85 billion years ago. The iron ore “factory” continued until there was nothing left to oxidize, roughly 1.1 billion years ago, and oxygen could start taking up residence in the atmosphere.

PictureThe sinusoidal habit and striking color contrast make M.E. jasper a must for the serious lapidarist.

The namesake of the Mary Ellen Mine is rumored to have originated from the first staker’s girlfriend (if that is not love, I do not know what is!). The jasper and associated iron ore comprise part of the extensive Biwabik Iron Formation which is composed of four distinct members or units (from bottom to top): Lower Cherty, Lower Slaty, Upper Cherty, and Upper Slaty. Historically, the upper cherty was mined by Erie Mining Company for its magnetite (Fe3O4) content; while the lower cherty was the principle iron ore mined throughout the Mesabi Range. The cherty members arose as a result of hydrothermal fluid circulation that has dissolved quartz in the area, and re-precipitated with iron minerals to form an intergrown texture. This same action also resulted in the pseudomorphism of the stromatolites, thus finishing the Mary Ellen’s transformation. The thermal source was none other than the emplacement of the Duluth Complex not too far to the east. This thermal, or contact, metamorphism also gave rise to other minerals found along the range which include: pyroxene, olivine, cummingtonite, and hornblende.
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Well I'd like to see his source before I commit to any particular date.

I think when he says "The iron ore 'factory' continued until there was nothing left to oxidize, roughly 1.1 billion years ago, and oxygen could start taking up residence in the atmosphere", he was referring to the overall period of BIF formation on the Earth, not the specific range of the Biwabik Fm stroms, and he probably didn't realize that the way he phrased it made it ambiguous.

Anyway, now I'm wondering which part of the formation these stroms come out of... I guess either the Lower or the Upper Cherty member.

 

 

20 hours ago, Yoda said:

Beetroot Stone 

Solenopora jurassica

Cirencester, Gloucestershire, Uk - White Limestone Formation 

Middle Jurassic - 165 m y

B665983A-AFD2-4A16-8B19-A5F3386B60A6.jpeg

This one is nice and the name is apt... I wonder if those bands are yearly variations.

 

Keep them coming, y'all, if ya got 'em!

 

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13 hours ago, Wrangellian said:

Anyway, now I'm wondering which part of the formation these stroms come out of... I guess either the Lower or the Upper Cherty member.

@Wrangellian, I have been in contact with the owners of the Mary Ellen Mine. Here is what they said:
 
We have a geologist that specialized his research on the Biwabik Iron Formation coming some time this summer to poke around. He may have the answer to that afterwards. As of now, all we know is that Mary Ellen grew above the iron ore deposits.
 
 
 
 
 
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12 hours ago, minnbuckeye said:
@Wrangellian, I have been in contact with the owners of the Mary Ellen Mine. Here is what they said:
 
We have a geologist that specialized his research on the Biwabik Iron Formation coming some time this summer to poke around. He may have the answer to that afterwards. As of now, all we know is that Mary Ellen grew above the iron ore deposits.
 
 
 
 
 

What is actually mined at the Mary Ellen Mine ?? 

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@Yoda, That particular mine is closed. They have moved on to other sites close by.

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On 5/9/2021 at 9:47 PM, Wrangellian said:

It has come to my attention that there was also a Show us your Algae topic, which I had forgotten all about. I didn't think to search for an Algae topic when I was looking for an earlier Strom topic.

 

 

I checked out the algae topic and didn’t see the below species, so I’m posting it here.  This piece has a mirror polish finish that made it very difficult to get an individual picture without a lot of light hotspots even in indirect light.  The black and white are much more vivid than in the individual picture.

 

Cladopora coral, Devonian period 360 MYA, Michigan (786g 4x3.5x1.75 inches)

 

Edit:  Thank you Adam.  See the below posts.  This piece contains fossil coral (Cladopora )  NOT fossil algae (Cladophora)

 

 

 

 

1876831549_90CladophoraAlgae48USDDevonianperiod360MYAMichigan786g4x3_5x1.75inches1.thumb.jpg.dd583e3d217c234aa770bd8134e167e4.jpg

 

1637289653_90CladophoraAlgae48USDDevonianperiod360MYAMichigan786g4x3_5x1.75inches3.thumb.jpg.f6f2aeeeaac1c2f6cc3b467b0ced3cc0.jpg

 

152919742_90CladophoraAlgae48USDDevonianperiod360MYAMichigan786g4x3_5x1.75inches4.thumb.jpg.a6adafda425b7a6d5f588f9295b28479.jpg

 

214303449_90CladophoraAlgae48USDDevonianperiod360MYAMichigan786g4x3_5x1.75inches6.thumb.jpg.68f43c4d89d16957c3894425949f4316.jpg

 

997256191_90CladophoraAlgae48USDDevonianperiod360MYAMichigan786g4x3_5x1.75inches7.thumb.jpg.a9a9c989c994d6788944c53317a1501e.jpg

 

274653231_90CladophoraAlgae48USDDevonianperiod360MYAMichigan786g4x3_5x1.75inches8.thumb.jpg.cd24ec97e2d5cdb70cf100fdbd6a1ec1.jpg

 

1369057348_90CladophoraAlgae48USDDevonianperiod360MYAMichigan786g4x3_5x1.75inches9.thumb.jpg.13ad77744f861ca3394604a2a0823a4c.jpg

 

1057427752_90CladophoraAlgae48USDDevonianperiod360MYAMichigan786g4x3_5x1.75inches10.thumb.jpg.e3c510d6b5ae8bd327b61e448904ff51.jpg

 

1848401195_90CladophoraAlgae48USDDevonianperiod360MYAMichigan786g4x3_5x1.75inches11.thumb.jpg.a824353b823098e329ee6cf0a28c8677.jpg

 

365674853_90CladophoraAlgae48USDDevonianperiod360MYAMichigan786g4x3_5x1.75inches12.thumb.jpg.904e82f6ea1a0c9caa0d4c419d1058db.jpg

 

465119063_90CladophoraAlgae48USDDevonianperiod360MYAMichigan786g4x3_5x1.75inches13.thumb.jpg.52060005c394214a26e5998d5ad43cc3.jpg

 

 

Marco Sr.

Edited by MarcoSr
The piece contains fossil coral not fossil algae.
  • Enjoyed 1

"Any day that you can fossil hunt is a great day."

My family fossil website     Some Of My Shark, Ray, Fish And Other Micros     My Extant Shark Jaw Collection

image.png.9a941d70fb26446297dbc9dae7bae7ed.png image.png.41c8380882dac648c6131b5bc1377249.png

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That's an alga? Wow, it looks like a coral!

There's no reason we can't continue with the Algae thread as well, and leave this one for stomatolites, microbialites and such. It seems there are lots of different kinds of algae/seaweed fossils out there. I'd like to have more myself but when they come up (not often), they get away from me (and I don't think I can find any in my local collecting sites).

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