My Chalk Fossils: Find By Arno.

[arno]

Beautiful and completely Nautilus out the Formation of Maastrichtian (Layer: Eben-emeal)

Taxon: Eutrephoceras sp. (20 cm)

Locality:Belgium: Eben Emael

Age: Cretaceous Period, Formation of Maastrichtian

Collector: Arno Vroomen

[Guest N.AL.hunter]

Very nice fossil. Wish we had easier access around here to some good nautilus and/or ammonite bearing formations.

[Auspex]

I like to see the process of the preparation: watching the beauty emerge. Thank you for sharing!

[Uncle Siphuncle]

Very cool. Eutrephoceras nautiloids can be had in TX as well if you look hard enough. They too are Upper K forms. I think we have E. dekayi and E. planoventer here in various formations. Our Lower K nautiloids include Cymatoceras hilli and Paracymatoceras texanus.

[Uncle Siphuncle]

I've attached a few images of ammonites and nautiloids found in the Pecan Gap and Anacacho formations of South Texas.

[dutchfossilhunter]

Very nice nautilus! also super rare here in The netherlands and Belgium!

[RJB]

Very nice find Arno! and again Dan, Wow!!!

RB

[Haizahnjager]

Wow Arno, looks like you've got to be strong to fossil collect in the Netherlands!

[worthy 55]

Great fossils guys !!!!

[arno]

I've attached a few images of ammonites and nautiloids found in the Pecan Gap and Anacacho formations of South Texas.

Hello Danwoehr,

thanks for showing these beautifull images. I -m jealous of your collection. in the belgium and dutch formation you can never find so many and differents sorts.

Can you tell me more about thise formations in South Texas? So can i go searching there every day , ore do you have a permit necessary?

Next year we will come the Florida back.for 15 days.

My email adres: arnovroomen@home.nl

gr arno

[Uncle Siphuncle]

Arno

The Pecan Gap (Kpg) and Anacacho (Kan) formations were laid down at roughly the same time (Campanian) and grade into each other. The Kpg is a fine grained gray to yellow to white chalk with sparse fossils that once found often exhibit phenomenal detail yet are compressed or crushed. Other than the fossils shown I've taken a few shark teeth, a pycnodont plate, various bivalves and gastropods, a partial fish, worm tubes, etc. Echinocorys texanus and Hemiaster texanus echinoids are sometimes found as well, the E. texanus being spectacular but crushed, their plate detail making them look like crashed spaceships. The type locality of the Kpg is in north TX on or near the North Sulphur River I believe. It outcrops in a thin, discontinuous band east of I-35 from the type locality all the way to San Antonio 350 miles to the south southwest.

In the San Antonio area it feathers into the Kan, a grittier yellowish limestone where the fossils generally are not as compressed. It continues west to the Anacacho Mountains in Kinney County I believe. The type locality may be in these mountains. Anyway, I've found a few exposures in South Texas with varied echinoids such as Codiopsis, Linthia, Phyllobrissus cubensis, Hardouinia bowlesi, Cidaris dixiensis, Hemiaster/Mecaster texanus, and possibly others. In addition the ammonites include Didymoceras, Bostrychoceras, Pachydiscus, Trachyscaphites, nautiloids, and Baculites. I've taken shark teeth, pycnodont mouth plates, shark verts, mosasaur material, and other cool stuff from this formation.

Most of my Kpg material came from construction sites, dump piles, and quarries, all gone or developed now, as well as creeks. My Kan material came mostly from quarries and private property as I don't know of any good public sites. I do research to find where I think good sites may be, then track down landowners and do my best to secure permission. It is sort of advanced collecting in that you can't simply drive around and access good sites without intimate knowledge of the area. It has to be a very targeted and thoroughly researched quest to be effective. No permits are required in Texas fortunately for fossils or artifacts.

[Guest bmorefossil]

how can you tell where the nautilus begins and where it ends?