Search the Community
Showing results for tags 'north texas'.
-
From the album: Post Oak Creek
The fossils in the creek can have varying levels of preservation: from the pristine glassy enamel seen at the top, to more river-worn seen below. -
From the album: Post Oak Creek
These oysters are common in the creek, and support the Turonian age of the fossils. -
From the album: Post Oak Creek
These oysters are common in the creek, and support the Turonian age of the fossils. -
From the album: Post Oak Creek
-
I finally took a trip to the North Sulphur river last week. There have been a couple good rains so I was hoping that would uncover some stuff. The last couple of trips in 2021 were terrible. All muddy and picked over. This trip was still pretty muddy and little in terms of quality mosasaur material. However I went low and found a lot of smaller material. I wonder if the recent muddyness of the river is due to the lake construction or if the river just hasn't had enough rain lately? Is picture 2 an enchodus jaw? I believe the pictures of item 3 are of a really chipped piece of mosasaur tooth. Still never found a whole one this color. Are the pictures of item 4 pachyrhizodus? I have seen people say these are really small mosasaur but I have always doubted this. Any way to identify item 5? Maybe xiphactinus? Item 6 are the few decent mosasaur pieces i found. Is the second one a phalanges bone? Any idea about 7? It is heavily fossilized so i was thinking cretaceous but the shape makes me think of more recent like pleistocene. And my final question. Is item 8 coprolite? Im terrible at identifying the stuff. 1. 2. 3. 4. 5. 6. 7. 8. 9. 10.
- 8 replies
-
- 11
-
-
- cretaceous
- enchodus
- (and 9 more)
-
I haven't seen much discussion on the geology of the well-known Post Oak Creek here in North Texas. I'd usually seen it referred to the Eagle Ford Group/Formation, but without much substantiation. I really hadn't given it much care, but as is a healthy practice in science, one should often reevaluate one's beliefs especially in light of new information. I believe there is some evidence to support the Eagle Ford assignment, granted I'm not a professional nor very knowledgable about geology and I welcome discussion and contrarian input. The Eagle Ford (Kef) is exposed near Sherman, so it's a possibility. The Austin Group/Austin Chalk is also here (Kau): ^https://ngmdb.usgs.gov/Prodesc/proddesc_19387.htm Here is the evidence that I believe favors that most of the Cretaceous fossils from POC are from the Eagle Ford: 1. Lithology USGS describes the lithology of the Eagle Ford formation: "In Sherman Sheet (1967) (NE Texas) shale, selenitic, bituminous, [calcareous] concretions and septaria, thin platy beds of [sandstone] and sandy [limestone]. in middle and upper part, [medium] to [dark] gray; marine megafossils; thickness 300-400 ft." (https://mrdata.usgs.gov/geology/state/sgmc-unit.php?unit=TXKef%3B0) (http://northtexasfossils.com/pdfs/shermansheet.pdf) I've found several matrix pieces with shark teeth in it that match the preservation of the vast majority of sharks in POC, which are sandstones. There are also septarian nodules like this one: 2. Presence of Cameleolopha bellaplicata Anyone who has been to POC has seen these oysters everywhere. They are often embedded in the same sandstone. Note that this illustrated one from Hook & Cobban (2011) was collected near Sherman (probably POC since they refer to it). Here is a specimen I collected: Hook & Cobban (2011) say that "Cameleolopha bellaplicata (Shumard 1860) is an easily recognized fossil oyster that occurs abundantly in sandy strata in Arizona, Colorado, New Mexico, Utah, and Texas, where it is restricted to the middle Turonian ammonite zones of Prionocyclus hyatti and P. macombi." These together are consistent with the description and age of the Eagle Ford formation. One possible strata for POC is also the lowest part of the Austin Group, the Atco. However, I've yet to find a description of the lithology which matches better than that above for EF. In addition, there is disparity in the fauna between the Atco and POC. There are many genera found in the Atco which I've yet to find after a few years of hunting Post Oak (e.g. Heterodontus, Protolamna, Dallasiella, Pariasurus, Pseudocorax, Microcorax, etc.; see Hamm & Cicimurri (2011)). This may be because I haven't looked long enough or there could be some other bias. If you have any of the sharks mentioned above from POC, I'd love to see them. That's all I've got from a one-sitting internet exploration last night, so please do double check my rambling.
- 2 replies
-
- 5
-
-
- eagle ford
- eagle ford formation
- (and 7 more)
-
From the album: Post Oak Creek
The "big guy" to find at POC. Though, this one is smaller, the preservation is as good as it gets for this location. In fact, it makes me believe that POC could draw from layers adjacent to the Eagle Ford Group. I've found matrix pieces that are consistent with the geology of EFG, but need to find matrix pieces with this kind of preservation to confirm Atco or something else. I'm also not sure that this is C. crassidens anymore since this smaller, narrower form differs so much from the holotype. I currently believe it's an undescribed species since I haven't found something that matches. Please let me know if you find a paper that fits this tooth (and the others at POC). -
From the album: Post Oak Creek
Reconstructed tooth set from a "Crow" shark - Squalicorax (could be S. falcatus) - illustrating the variety of tooth positions. Anterior teeth have erect, triangular cusps. Lateral teeth and posteriors are more common and have an increasingly posteriorly slanted crown, resembling the teeth of modern tiger sharks. -
Found in Grayson formation Tarrant co, have searched and searched and finally came across Pseudoperna congesta, if that's not what it is I give up . Can't tell what they were attached to, assuming it's a mineral encrusting them? Or are they encrusting the mineral? My guess is it's some form of iron oxide, perhaps magnetite? Scale is cm.
-
Thought I picked up a little echinoid until I got home and put glasses on, thinking this is some kind of coral, perhaps micrabacia? From Eagle Ford.
- 3 replies
-
- 1
-
-
- coral
- cretaceous
- (and 1 more)
-
From Grayson marl in Tarrant co, doesn't look like the other ptychodus teeth I have but don't know what else it could be. Really thrown off by the hole. Eager to learn it's identity.
-
I could probably fill the back of a pickup truck with ironstone I've picked up for closer inspection because it looked like it may have fossil possibilities, have only found a few and this is one. Found in Grayson formation Tarrant co, first thought was ammonite impression but there's a second faint impression on opposite side that doesn't fit with that and the outline isn't right, or am I not imagining the overall shape correctly?
-
Had a couple hours to hunt one of my local spots this evening… I didn’t find much, but I did manage to pull a nice little bivalve shell embedded over an ammonite imprint. cheers!
-
A bit of a vertebra theme tonight so thought I'd jump in, found this in creek in Cretaceous Eagle Ford but the area is QT and QAL also. It's not fully mineralized just like most bones from around here, I think it looks like croc but it's very worn so could be wrong.
-
Awhile back @Rockwood posted something similar to this and was given the ID Serpulid Reef, which I had never heard of until then. Would that be what this is? This is from creek in Eagle Ford, what's most curious is how the wad of spaghetti perfectly comes together at the mouth(?)end. Pictures I've seen of these reefs show worms poking out out in every direction.@erose
- 5 replies
-
- 3
-
-
- cretaceous
- north texas
- (and 3 more)
-
So I'm looking at an area by creek I hunt in and what do I see? A full size passenger plane sitting in a wooded field, undamaged. This is a couple miles away from airport so can anyone take a guess as to how and why it's there?
- 19 replies
-
- 1
-
-
- airplane
- north texas
- (and 1 more)
-
I’m still very new to fossils, but I’ve been hunting in and around North Texas the last 6 weekends… This is the best 25% of what I’ve found so far.
- 4 replies
-
- 11
-
-
-
- austin chalk formation
- duck creek formation
- (and 1 more)
-
I recently found a construction site in a productive layer of the Eagle Ford. I found several ptychodus and other shark teeth as well as some pachyrhizodus teeth, a possible mosasaur tooth, and a couple of items that i cant figure out. Here are a few pictures of my finds as well as the items im not sure about. 1. The haul 2. possible Mosasaur or other reptile tooth? It is skinnier than a mosasaur and it is oval like as well so i cant figure it out. 3. I have seen this before on TFF but cant find the post. Anyone know what this is? 4. Fish bone for sure. Maybe a jaw segment? 5. I have no idea about this one. Anyone? 6. This is just a rock i'm pretty sure but don't think it would have formed this way coincidentally. Geological?
- 15 replies
-
- 9
-
-
-
- cretaceous
- eagle ford
- (and 6 more)
-
In my favorite creek with water levels so low there is a facinating little stretch exposed that is unlike any other part of the creek I've seen. There's about 100 ft of this grey marl in lower bank going into water, it's gritty, some still soft some like cement, loaded with gastropods, bivalves, and coalified wood. Running through it are the biggest calcite veins I've ever seen, some 10-15 ft long and almost pink, have no idea how far down they go. I was barely able to break a section off, this is part of one the smaller veins. Wondering if anyone has seen something similar. The other odd part is above that, there is a layer about 3ft deep of what I call cobblestone clay, it's hues of yellow and orange layered and rounded easily falls apart. Found shark teeth in it but I've never seen anything like it in Eagle Ford. Is there an association between the layers or do they even belong together?
- 19 replies
-
- 1
-
-
- creek bank
- cretaceous
- (and 3 more)
-
This is from Duck Creek formation in Tarrant county, not familiar with fossils from there so not sure what this is, looks very similar to a bacculite to me except for ridge running the length of it. Half cm long.
-
Collected some rocks from the Grapevine Lake area, however I'm wondering if these are from Woodbine or imported rocks? This is first time I've found any parts of an echinoid, I know some are spines but there are different ones, I recognize some of the other things but not all so numbered them. The last 2 pics I tried to get shot of tiny baby echinoids, there may be 2 in one pic but one looks exploded. There were so many things I couldn't even get them all but this will be good start.
-
I have no clue what this is, not sure how much is missing so that makes it hard along with still learning about the Goodland formation. Doesn't quite look like a gastropod or ammonite hopefully the little bumps are a clue someone recognizes.
-
Hello, Earlier today I found these two Fossil vertebra which I suspect are either Fish or Mosasaur or Plesiosaur, in a small gravel bank near some Texigryphaea. These are also my first fossil vertebrae. I found these two in the East Fork Trinity River in North Texas. And the two vertebra were right next to each other, probably two or three inches away from each other. I then looked later on the USGS Geological Survey and found that the Elm Fork Trinity River has holocene-era rocks, so then that rules out Mosasaur I guess? I looked online to see Mosasaur and fish verebrae to see if I could compare my finds with them, and the smaller vertebra has the same bone pattern things or veins that some of the other vertebra online had. I must say, they look more bone-like in person. But does anyone know the species or classification of these vertebrae? Any help is appreciated
-
Hi guys and gals! I found this mystery fossil a few years ago and the people I spoke to at SMU and the Perot are not sure as to what it is. I thought I throw it out here and see what opinions you all might have. Thanks for taking the time to look and try to help. Woodbine Formation : 95-98mya North Texas
.thumb.jpg.5e2267353205274e1da95aa404c1b075.jpg)
