South Texas Dino Prints And Caphalopods - Need Id

[Piedras_de_Tejas]

Here are all my unknowns from the past few months of collecting and snapping pics before joining the forum. Some are weathered, but any help identifying is greatly appreciated The first two are glen rose formation dino prints about 16 inches from heel to to toe. The third is a nautilus (eutrepoceras?) from central san antonio i extracted from a soft limestone boulder. Its about 9 inches across and the lower of the three well-defined sutures i think is eroded into a deeper curve than it would have originally had.

Edited June 2, 2014 by Piedras_de_Tejas

[Piedras_de_Tejas]

Here is the first ammonite i ever saw, approximately 17 inches across found near the previous nautilus alongside the next ammonite fragment

[Piedras_de_Tejas]

The following three pictures occur in the same layer of limestone in west san antonio.

Embedded Nautilus.

Partial, weathered ammonite i started extracting.

Apparently im not the only person digging around here

[Piedras_de_Tejas]

I have heard these are del rio formation, all from the same site near san antonio.

The first i think is a large plate of ilymatogyra arietina oysters.

Not sure if anyone else has encountered this, but many of the oysters are hollow and lined with what appear to be calcite crystals.

I am not sure at all what this is part of.

Edited September 27, 2014 by Piedras_de_Tejas

[RyanNREMTP]

The last picture is part of the oyster shell. Those are pretty common in the part of the del rio I collect from. I still pick some of them up every now and then. The ones with crystals in them are interesting. The only one that I have found like that have been rudists.

[Uncle Siphuncle]

looks like you spent some time in the austin chalk based on the ammos and nautiloids. the big glob in situ is another nautiloid with aperture facing down. the last pic is an oyster xenomorph that used to be on a mariella ammonite, now eroded away.

[Fossildude19]

I believe the large dino tracks in the Glen Rose are generally attributed to Acrocanthosaurus.

Regards,

[MarcoSr]

Here are all my unknowns from the past few months of collecting and snapping pics before joining the forum. Some are weathered, but any help identifying is greatly appreciated The first two are glen rose formation dino prints about 16 inches from heel to to toe. The third is a nautilus (eutrepoceras?) from central san antonio i extracted from a soft limestone boulder. Its about 9 inches across and the lower of the three well-defined sutures i think is eroded into a deeper curve than it would have originally had.

Screenshot_2014-06-02-01-04-27.png

Screenshot_2014-06-02-01-04-53.png

Screenshot_2014-06-02-01-05-48.png

What eventually happens to dino tracks like this one? Do collectors try to remove them or do they just eventually weather into oblivion?

Marco Sr.

[Auspex]

What eventually happens to dino tracks like this one? Do collectors try to remove them or do they just eventually weather into oblivion?

Marco Sr.

From a scientific standpoint, cutting them out and removing them from context is the same as letting them weather away. Far better to take a cast.

[Piedras_de_Tejas]

Ryan: Thanks, i actually rarely find those. My site is literally more ilymatogyra (millions) than "rocks" and specimens of anything else are uncommon, but my profile pic contains some of my del rio formation finds, excluding the carbonized wood piece i found in the creek with them. Also, I have some rudists and corals replaced by quartz and chalcedony, but i thought it was neat that the ilymatogyra are often lined with calcite.

Dan: Thanks, that's what i hoped for. Pics 6-8 are from the area behind my neighborhood and i'm hoping to extract 6 and 7 sometime this week if i can find the time. Any chance you can identify the nautiloid in my third pic of the first post? If not i'm trying to find a way to clean it up since its my first nautiloid and i'd like to make it presentable. Hard to tell the difference between the matrix and the fossil though since the shell is mostly crushed or missing.

Tim: Thank you.

- Cameron

[Uncle Siphuncle]

if the nautiloid is from the austin, and fat in cross section, eutrephoceras campbelli is a contender.

[Piedras_de_Tejas]

Thanks Dan. I'm guessing it is austin chalk, but i will check.

[AeroMike]

Thanks to Herr Woehr, I have a couple of nice "Texas" sized Ammonites from Texas~!!!!

[Uncle Siphuncle]

Bitte sehr!