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I've been posting Fox Hills Formation fossils from a recent trip but I feel that those are a poor representation of the often spectacular preservation and diversity of the Fox Hills Formation. Because of that I've decided to post some of my better Fox Hills specimens from North Dakota. We'll start with some lovely ammonites. Jeletzkytes nebrascensis is common throughout the Fox Hills Formation in the Timber Lake Member (perhaps a bit less so in North Dakota) and is a typical flagship species for the formation. This microconch from Emmons County is the largest complete J. nebrascens
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Return to the Cannonball River (plus a little Fox Hills)
Thomas.Dodson posted a topic in Fossil Hunting Trips
Over the weekend I tried some new Fox Hills and Cannonball Formation sites as well as returning to a couple old ones. Most of the new Fox Hills site was covered in abundant Ophiomorpha, a decapodian trace fossil very typical for parts of the Fox Hills. Abundant free weathered pieces of the burrows. There was a rather large Crassostrea subtrigonalis oyster bed on the property. A common fossil in the upper Fox Hills but I don't often see them in the abundance of this site (fragments in the thousands). All white/sharp edge- 8 replies
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- fox hills formation
- bivalvia
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More Cannonball and Fox Hills Formation (An Unusual Ammonite) 8/9/21
Thomas.Dodson posted a topic in Fossil Hunting Trips
I lined up a couple more properties over the weekend so I made another trip out to exposures of the Cannonball Formation (Paleocene) and Fox Hills Formation (Upper Cretaceous). I only planned for two properties but the first was so large (an entire section with many outcrops) that I figured this was fine. It was a nice morning and much of the haze from the Canadian wildfires has subsided. Junipers often creeped over sandstone concretions on the cliffs. A slump exposure of Cannonball Formation viewed from the top of another exposure. The top of hills- 7 replies
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- cannonball formation
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The weather was nice so I decided to get out to a couple sites that were on my list. The first site is the site where a friendly pocket gopher throw up fossils at an otherwise barren spot. Only one pocket gopher mound had fossils. The nearby ones apparently never made it to the layer of Fox Hills strata, even the ones within a few feet of this one. An unassuming site. The fossiliferous pocket gopher mound. This time the conditions were fine for sieving so I proceeded to sieve this gopher's pile. Lots of shell fragments but also some more complete stuff. I ra
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- cretaceous
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Back to the Fox Hills Formation June 2 Trip Report
Thomas.Dodson posted a topic in Fossil Hunting Trips
I had the opportunity to get out to my favorite area of the Fox Hills Formation last week right before the temp skyrocketed into the 100s. I returned to my favorite Timber Lake site as well as tried some new ones. The first site I tried on the way down was not an exposure of the Fox Hills at all but probably of the Cannonball Formation, at least in part. I didn't find anything at this site but it was pretty nonetheless. There's lots of exposed Fox Hills sandstone at my favorite Timber Lake site but the fossils are not as well preserved as those in th- 9 replies
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- fox hills formation
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I've collected another Fox Hills shark tooth and I wanted to see if anyone more familiar with Maestrichian shark species has any ideas on what it may be. Attached is a preliminary list of species present in the Fox Hills of North Dakota as reported from Hoganson in 1995. There have been additional species discovered since that are present in a recent publication but I don't currently have access to that paper. I do have experience with some of these from other Cretaceous deposits but I welcome input from anyone with ideas. Pictures of the specimen. It has been difficult to get clear
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North Dakota Outing April 1 Cannonball Formation/Fox Hills Formation
Thomas.Dodson posted a topic in Fossil Hunting Trips
On the 1st I had the opportunity for another trip and made it out to Morton County. I was waiting until now to post the report because I wanted to finish preparing a crab to include in the report but I've been busy. I went to one Fox Hills Formation site but mostly I had sites lined up from the Paleocene Cannonball Formation and some Fort Union Group formations. Compared to Emmons County across the Missouri River there is less Fox Hills Formation and it is replaced mostly by the overlying Hell Creek Formation and Paleocene units. Some scenery showing outcrops of the Cannonball Form- 10 replies
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Fox Hills Formation in North Dakota 3/18/21 Pictorial Trip Report
Thomas.Dodson posted a topic in Fossil Hunting Trips
Went to attempt some new sites in Emmons County North Dakota yesterday. It was a pretty intensive day (out for 12-13 hours) for only a little bit of fossils but I thought some people might like to see the usual trip report photos and fossils I did find. Extensive clayey shale exposures are always worth photographing. Some horses were curious what I was up to but eventually lost interest. I'm not 100% sure this is Fox Hills (the clayey shale exposures of the Trail City and Timber Lake members look a lot like Pierre Shale when not accompanied by sandstone) but it didn't produce so it- 13 replies
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Despite the shortest and most mild winter I've experienced in North Dakota (getting out this early is rare) it still feels like it has been an eternity since I got out. Thankfully I finally got a hold of enough landowners to warrant a trip to the Fox Hills Formation and celebrate the spring weather. While most of the later sites I visited were a bust the first site of the morning was excellent and contained fauna not often found in the Fox Hills Formation in North Dakota. 3 new species for me in fact. This site represents a brackish transition area of the top of the Fox Hills Forma
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A few weeks ago we had unseasonably warm weather and I decided to make a trip to central North Dakota and collect from some exposures of the Fox Hills Formation (Cretaceous). I've spent a lot of time in this formation but had some new areas I wanted to try. Views looking up and down on the main cut of a Timber Lake Member exposure. This was the most significant new exposure of the day. Most of the Fox Hills Formation in North Dakota is sandstone of various grain size. The characteristic concretions with fantastic preservation that occur in the type locality also oc
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A Visit to the Fox Hills fm. - Eastern Colorado
Brett Breakin' Rocks posted a topic in Fossil Hunting Trips
Finally ... a short trek on the open prairie of Eastern Colorado and into a slice of the Cretaceous period. This was my first true jaunt since my move from the East coast and it was a welcome change to my normal routine. My journey really began several years ago when I purchased some shark teeth from a fossil forum member in Colorado. He regularly visits a site on private land in Eastern Colorado that contains (what we think) are exposures of the Fox Hills fm. , and are chock full of marine fossils from that time period. I contacted him several weeks after I arrived, desperate to- 34 replies
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From the album: Odd and Rare Shark Teeth
Meristodonoides sp. featuring most of its root from Poison Springs, Colorado. Fox Hills Formation, Maastrichtian in age. -
From the album: Odd and Rare Shark Teeth
Meristodonoides sp. featuring most of its root from Poison Springs, Colorado. Fox Hills Formation, Maastrichtian in age. -
Jeff J. Person & Becky Barnes, 2018, New Plesiosaur Exhibit at Heritage Center State Museum. Department of Mineral Resources Geo News. 45(2) pp. 1-4. https://www.dmr.nd.gov/ndgs/documents/newsletter/2018Summer/New_Plesiosaur_Exhibit_at_Heritage_Center_State_Museum.pdf https://www.dmr.nd.gov/ndgs/newsletter/2018Summer.asp Clint A. Boyd, 2018, A Pleasing Discovery from North Dakota’s Ancient Seas. Department of Mineral Resources Geo News. 45(2) pp. 5-10 https://www.dmr.nd.gov/ndgs/documents/newsletter/2018Summer/A_Pleasing_Discovery_from_Nort
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Hello there! I was the lucky one who recently purchased "ammonite batch #3" from @RJB, and I was hoping to assign a name to the prettiest piece in the lot. I think it is a Discoscaphites sp. - what do you think? If so, there appears to be two common species belonging to this genus from the Fox Hills Formation in South Dakota (where this little guy was found) - D. conradi and D. gulosus (http://digitallibrary.amnh.org/handle/2246/815 and http://www.wmnh.com/wmima000.htm). I'm leaning towards D. conradi but, really, I'm not sure. Is there anyone out there who can help? Please se
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Ever seen the positive and negative of a Fox Hills ammonite?
-Andy- posted a topic in Member Collections
I've been looking for a lovely SD ammonite for awhile, and I consider them on par with Canadian ammolites. There are a plethora of incredible specimens from Fox Hills Formation, and I settled on a Jeletzkytes as I found their shape appealing. Imagine my delight when I chanced upon a positive + negative! Today, this pair is one of my favorite ammonites. Without the matrix base, it measures roughly 4.6 inches high. Jeletzkytes nebrascensis 70.6 - 66 mya (late Cretaceous) Fox Hills Formation South Dakota, USA- 7 replies
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