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Question about the division between time periods. Ordovician vs. Silurian
Recker posted a topic in Questions & Answers
I have a question about the different time periods, I live in Southeast Indiana, Whitewater river area, within the Cincinnati region and Ordovician period. Having a hard time understanding this, will I only find Ordovician period fossils or could I find later period fossils like Silurian fossils? And why? You all have been so helpful and I appreciate it. Linda -
Getting My Feet Wet In the Ordovician of Wisconsin and Iowa
RCFossils posted a topic in General Fossil Discussion
2018 was the year that I finally took some time to explore Ordovician aged sites in Southwestern Wisconsin and Eastern Iowa. Inspired by past forum posts (special shoutout to Caleb Scheer who was unfortunately taken from this world way to young) along with an invite from a fellow Fossil Forum member, I was able to make several trips into the fossil rich Platteville and Maquoketa formations. I was mainly focused on finding some of the amazing trilobites that these formations are known for. I also collected some nice representative examples of the various other fauna. Most of my experience collecting Ordovician fossils has been in the Cincinnatian of Indiana, Ohio and Kentucky. For those not familiar with collecting in the Cincinnatian, the vast majority of trilobites that you will find are Flexicalymene meeki along with lots of bits and pieces of Isotelus. One of the things that struck me right away in the Platteville and Maquoketa was the quantity and diversity of trilobite types that are readily found. While almost all of the trilobites will be fragments, occasionally you get lucky and find something complete. There is definitely a learning curve sorting through the various trilo-bits and learning to recognize the various species. Forum member Piranha was always willing to help out with identifications. My first trip out was in late Winter. I spent a day with forum member Fossilized collecting a few roadcuts in both Wisconsin and Iowa. The first relatively complete trilobite that I came across that day was also possibly my rarest find of the year. It is a very rare Cheirud: Acanthoparypha sp. Unfortunately the cephalon was gone but still an impressive specimen.
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I found this while looking around the Whitewater River area, Franklin Co Indiana, Southeast Indiana. It's eroded a bit but could it be an internal mold of the top of a Cyclonema? Appreciate everyone's help! Linda
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I only recently got into collecting after being out hiking and literally tripping over a large coral fossil a couple years ago and the hunt has been on since! SO much to learn! I wish I'd have started 30 or 40 years ago. I haven't posted any of my finds as I've been trying learn a little first and see if I could identify some of these. I think I've got some of them and others I haven't found a name for, so I hope you don't mind me dumping several on you. Are all these Receptaculites Oweni? They were found in the Galena dolomite in the Dubuque area in what I think is the Fairplay member of the Dunleith. (30 or 40 feet above river level) The third photo of the slightly smaller one was found in a drainage ravine so I can't be sure the layer it came from, but I don't believe it had been carried very far if at all. It was 30 or 40 feet higher than the other two. Is the last one Ischadites Iowensis or another Oweni? Is there a good guide to these somewhere? These next are of a nautiloid I haven't found the name for. This was found in the Guttenburg member of the Decorah also in the Dubuque area near river level. It was in the outcrop about a foot above the top of what I think is the Spechts Ferry member. I also found quite a few Rafinesquina brachiopods laying around in the talus and the pygidiums of a couple different trilobite. I think one is Gabricerarus Mifflenensis and the other Isotelus? It looks a lot like the ones in the last photos of what I'm pretty sure are some Isotelus Iowensis I found near Elgin, IA). Are these Isotelus Iowensis? These were found near Elgin, IA in what I think is the Elgin member of the Maquoketa. About a foot above the Turkey river that day. You can actually make out what I assume are compound eyes? Being kind of new to this I'm amazed at the detail you can still see in some of these for something so old. I haven't found the name of these cephalopods yet either. They were found the same day and not far from the trilobites in Elgin and about 5 or 6 feet higher in the rock layer.
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Hello, I found this at the beginning of 2018 and haven't given it much thought until I saw the post from 2016 about a strange specimen that looked like Native Americans carved. The topic has been linked below. Below is the specimen I found and was curious if its the same process and is also counter septarian? I also thought they might be beekite rings. Any thoughts and ideas would be greatly appreciated. Best regards, Paul
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All-- I'm newer than new, but I've been here before and received great help. Will you please help again? I found this approximately 4.5" x 4.5" (11.4 cm x 11.4 cm) piece in a creek bed (Spring Creek; altitude ~700 ft [213 meters] above sea level) in south-central Missouri about 26 miles north of the Arkansas border. (Very near Rockbridge, MO.) I THINK it is either a coral or a sponge and hope I haven't already misidentified it! Thank you for helping this total novice. --Bill
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I was poking around at the Whitewater River here in Indiana. Found a few nice coral pieces but I'm not sure what the fossils are on the upper and lower left. Any ideas? I appreciate it so much. Linda
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Found associated with T. rougensis, T. spinosus, brachiopods, cephalopods, and graptolites. Included in multi plate alongside eight other complete or near complete T. eatoni.
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Included in multi plate alongside eight other complete or near complete T. eatoni. Found in association with T. rougensis, T. spinosus, Brachiopods, Cephalopods, and Graptolites. The Cephalon is slightly disarticulated, likely from molting.
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Both genal spines are present. Right side of cephalon is slightly pyritized. Found associated with T. spinosus, T. eatoni, cephalopods, and graptolites.
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Found this bivalve near the bank of Tablerock Lake in Beaver Arkansas. Looking for help to ID. Modern or old?
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From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Selenopeltis sp, a very rare trilobite found in the ordovician of La Dominelais during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Salterocoryphe salteri salteri, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
Good morning! I have been puzzling over this piece of what I believe to be a type of rugose coral, a little over an inch across at its widest, 1.5 inches tall but a fragment of a whole. The closest thing I could find might be ketophyllum perhaps? It was found on the western edge of the Otisco Valley in central/western NY state, between Skaneateles and Otisco lakes. The layers if the area I am know of are is Ordovician/Silurian/Devonian, i am not certain as to its original bedding plane location as it was a post thunderstorm erosion find, all sorts of fresh material came down the gorge, but i think it came from above the “famous” layer of Staghorn coral that emerges on the east side of Skaneateles lake. It popped right out of the shale I split and is almost graphite in appearance, the "stump" nodes that look like broken off appendages and the vertical pattern (vs the typical horizontal growth bands in the common staghorn corals) make it very different from anything I have found in the area, it almost looks soft-bodied, realizing how unlikely that is. I love the detail in this piece, it looks like there may be preserved damage/healing that occurred in life but I may be reading too much into that thought. Additional angles attached, just quick ipad shots but they may be helpful. No visible septa on either end, nothing radial or even patterned, although it looks like there may have been an internal, central structure. Thank you! It may have come down from the Devonian Otisco Member of the Ludlowville Formations (Upper Hamilton Group)?
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Hello there, Since the start of summer i had te opportunity to pay a few visit to 2 ordovician trilo sites. All in all, the hunts had been snarge good in both places. The faunas are about the same. I had a few days off work lately so i could spend some time cleaning them. To start with a few Colpocoryphe rouaulti from both sites : I hope you en joy those littel guys. More to come.
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From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Prep project 1 Neseuretus tristani, a trilobite as it was discovered in the ordovician of La Dominelais during autumn 2018. Circled one of the cheek poping out the nodule. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Prep project 1 Neseuretus tristani, a trilobite as it was discovered in the ordovician of La Dominelais during autumn 2018. Circled the pygidium poping out the nodule -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Rolled up Neseuretus tristani - view 2, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Rolled up Neseuretus tristani - view 1, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
Neseuretus tristani lying on a belerophon gastropod
elcoincoin posted a gallery image in Member Collections
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani lying on a belerophon gastropod, a trilobite found in the ordovician of La Noe Blanche during summer 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani, a trilobite found in the ordovician of La Dominelais during autumn 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani, a trilobite found in the ordovician of La Noe Blanche during summer 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani, a trilobite found in the ordovician of La Noe Blanche during summer 2018. -
From the album: La Dominelais / La Noe Blanche - automnal prep - a few more to join the trilo army
Neseuretus tristani, a trilobite found in the ordovician of La Noe Blanche during autumn 2018.
