Search the Community
Showing results for tags 'microsite'.
-
From the album: Hell Creek Formation Microsite
Mussel shell fragments litter the matrix, so much so that even in the finest grain size it looks to have been laced with glitter. The original shell material that makes them appear iridescent (nacre) is preserved, which makes it somewhat surreal to sort through - as if this dirt was shoveled from a river yesterday. The colors are more vibrant when they’re damp. Unfortunately they are extremely fragile and crumble if you so much as look at them.-
- hell creek
- hell creek formation
- (and 3 more)
-
From the album: Hell Creek Formation Microsite
Illustration of pre-fossilization channel weathering effects: physical and chemical. River action physically tumbles and erodes details and sharp features, the acidity of the water may chemically erode surfaces, causing pitting. A) Trionychid turtle shell; B) holostean fish (Cyclurus) maxilla.-
- hell creek
- hell creek formation
- (and 3 more)
-
From the album: Hell Creek Formation Microsite
Under the microscope, one may find these tiny treasures - microscopic shark teeth! They are uncommon and require a lot of effort to find.-
- 1
-
- hell creek
- hell creek formation
- (and 3 more)
-
From the album: Hell Creek Formation Microsite
Some bones are so river tumbled that they become rounded, even to a near-polish in some cases, and are referred to as “bone pebbles” in the literature.-
- hell creek
- hell creek formation
- (and 3 more)
-
From the album: Hell Creek Formation Microsite
The vast majority of what I find looks like this - chunks of bone and fish bits. In leaving “no stone unturned”, I’ve picked out thousands of pieces of this stuff just to recover a handful of exquisite specimens.-
- hell creek
- hell creek formation
- (and 3 more)
-
From the album: Hell Creek Formation Microsite
A representative sampling of the diversity captured in microsites - everything from Tyrannosaurus to mollusks.- 6 comments
-
- 13
-
- dinosaur
- edmontosaurus
- (and 11 more)
-
From the album: Hell Creek Formation Microsite
Acheroraptor was a small theropod (dromaeosaurid) "raptor" that lived in the same paleo-ecosystem as T. rex. Its blade-like serrated teeth possess diagnostic apicobasal ridges.-
- 1
-
- acheroraptor
- acheroraptor temertyorum
- (and 11 more)
-
From the album: Hell Creek Formation Microsite
Gars are predatory fish, armored with diamond-shaped scales coated in a hard enamel-like substance. -
From the album: Hell Creek Formation Microsite
Myledaphus (a guitarfish/ray) teeth are quite common, as expected for a riverine deposit. -
From the album: Hell Creek Formation Microsite
Sections of ossified tendons from ornithischian dinosaurs. Especially in an energetic channel environment, these fragile structures are broken into pieces. You’ll notice the surfaces and ends of several of these are rounded from river transport prior to final deposition. -
From the album: Hell Creek Formation Microsite
A fragmented piece of fiery orange amber. Most amber from the HCF is quite small, this one was only a few mm in diameter -
From the album: Hell Creek / Lance Formations
The Hell Creek formation exposed in Montana - a fossil-lover's paradise.- 1 comment
-
- 4
-
- edmontosaurus
- hell creek
-
(and 4 more)
Tagged with:
-
From the album: Hell Creek / Lance Formations
A shed Triceratops tooth found at a microsite-
- 1
-
- hell creek
- hell creek formation
-
(and 3 more)
Tagged with:
-
From the album: Hell Creek / Lance Formations
-
- edmontosaurus
- hell creek
-
(and 4 more)
Tagged with:
-
From the album: Hell Creek / Lance Formations
-
- 1
-
- edmontosaurus
- hell creek
-
(and 3 more)
Tagged with:
-
From the album: Hell Creek / Lance Formations
-
- edmontosaurus
- hell creek
-
(and 3 more)
Tagged with:
-
From the album: Hell Creek / Lance Formations
Richardoestesia teeth have very fine serrations. A couple of mm of the tip was reattached after I found it in the matrix I was scrupulously searching.-
- hell creek
- hell creek formation
- (and 7 more)
-
From the album: Hell Creek / Lance Formations
-
- 1
-
- hell creek
- hell creek formation
- (and 5 more)
-
From the album: Hell Creek / Lance Formations
A monitor lizard from the very end of the Cretaceous. The carinae are slightly serrated, and in basal view the mesial carina projects from the silhouette like a wing.-
- hell creek
- hell creek formation
- (and 7 more)
-
From the album: Hell Creek / Lance Formations
Among the iridescent mollusk shell shrapnel, lies a molar from a small Cretaceous mammal.-
- alphadon
- cretaceous mammal
- (and 10 more)
-
From the album: Hell Creek / Lance Formations
A hybodont "shark" found in a channel deposit. This was among the last of the hybodonts - a group that spanned nearly 300 million years before going extinct along with the non-avian dinosaurs 66 million years ago.-
- 1
-
- hell creek
- hell creek formation
- (and 10 more)
-
From the album: Hell Creek / Lance Formations
An Orectolobiform shark that swam the rivers of the Hell Creek ecosystem. Their teeth closely resemble those of the modern carpet shark, the "wobbegong." This was found in matrix from a channel deposit.-
- hell creek
- hell creek formation
- (and 8 more)
-
Hi everyone, I found this little, mostly complete vertebra in the Hell Creek formation of South Dakota in 2019. I don't really know what to make of it as it's very porous, and amphiplatyan (flat on both sides), although I'm not sure how much of that could be attributable to wear. I believe it's safe to cross of squamate (due to lack of concavity) and champsosaur (overall shape) off the list. While most of the crocodilian verebrae I have found in the hell creek have have a convex and concave end, I am aware that some can be found that are flat sided. The porosity of the bone makes me hopeful that it's theropod, but am not by any means discounting mammal, croc or any other possibility. Dimensions are 1 cm in length, .8 cm in height from base to the end of the process and about 1.2 cm. I would like to know the opinions of my fellow members.
- 10 replies
-
- cretaceous
- hell creek
-
(and 2 more)
Tagged with:
-
Hey everybody! I wanted to make a thread sharing with you some of the smaller fossils in my collection, many of which I've photographed using my digital microscope. Some of these I've found in the field at microsites or channel deposits, while others I've found at home searching through matrix. I hope you enjoy! Our journey begins in Wyoming's Lance formation: A Pectinodon tooth my dad found in 2017. A tooth that was identified by other forum members as potentially Avisaurus, also found in 2017. A tooth I initially called Paronychodon, although the small & worn denticles may suggest otherwise. Found in 2020. A tooth which was once the smallest in my collection at around 3 mm., potentially Acheroraptor but currently is indeterminate. Found in 2020. Probably my smallest crocodilian osteoderm in good shape, found in 2019. A tiny dermal denticle, potentially from Myledaphus. Found in 2020. The smallest mammal tooth in my collection, an itty bitty multituberculate I found at home working on conglomerate matrix in 2019. A nodosaur tooth (Denversaurus) found in 2020. A collection of small fish mouth plates (cf. Cyclurus) from 2020. A salamander premaxilla (cf. Scapherpeton) found in 2020. A Thescelosaurus premax tooth from 2020. A view of some of the Lance fm. anthill matrix I brought home to search, with a piece of fish mouth plate in the center
- 2 replies
-
- 5
-
- aguja
- cretaceous
-
(and 7 more)
Tagged with:
-
Hi all. I know it's been a long time since I've posted anything on the forum, but now that I'm back from college I'm planning on being more active. Today I wanted to post this odd fossil I found this past summer at a Hell Creek formation microsite in eastern Montana. I've never seen anything quite like it before, but my guess is that it's some odd denticle from a cartilaginous fish of some variety OR alternatively it could just be an odd fish tooth (maybe pharyngeal?). It measures about 4 mm from base to tip and a little bit over 1 mm at its widest. Any input would be appreciated. -Noel
- 5 replies
-
- cretaceous
- hell creek
-
(and 4 more)
Tagged with: