Texas Heteromorph ID

[PFOOLEY]

8 hours ago, KimTexan said:

May I ask your name?

My name is Mike...pleasure to meet you, Kim.

 

8 hours ago, KimTexan said:

I have certainly enjoyed your ammonites...

As I do yours (or anybody's for that matter...love me some ammonites! ).

 

8 hours ago, KimTexan said:

I’ve seen a number from our Eagle Ford...

One day, I want to cruise that formation in person...put me in the Arcadia Park and let me loose!...Kamp Ranch or South Bosque would work as well. 

[PFOOLEY]

One more reference...

 

Upper Albian and Lower Cenomanian ammonites from the Main Street Limestone, Grayson Marl and Del Rio Clay in northeast Texas

 

....

[KimTexan]

On 9/28/2018 at 8:23 AM, PFOOLEY said:

My name is Mike...pleasure to meet you, Kim.

 

As I do yours (or anybody's for that matter...love me some ammonites! ).

 

One day, I want to cruise that formation in person...put me in the Arcadia Park and let me loose!...Kamp Ranch or South Bosque would work as well. 

Nice to make your acquaintance Mike. Thanks for responding.

 

If you’re ever in the area I would be delighted to take you to the exposures I know of. I take people hunting just for the fun of sharing in the hunt with those who are fossil hunters and for the joy of sharing my great love of them with those who aren’t. Also, I feel I always have something to learn from those more experienced than myself and hope that when I hunt with them I will be blessed with some impartation of knowledge or insight from them even if they’ve never hunted the area. Invariably I do receive a greater knowledge when I hunt with others.

Maybe you know of some in the area already though.

I have yet to find a productive Kamp Ranch or Arcadia Park exposures. It could be that I have not thoroughly explored the ones I know of. One of the Arcadia exposures has an area that is labeled on maps as a public area and has been so for years, but one side is fenced off. I have not ventured to the other sides to see if there is access another way. The area looks to be maybe 150 acres with lots of exposure in embankments on hills. I need to try again from another side of the area. All areas are bordered by dense undergrowth though. So even if fences off entering it send a bit of a challenge. But I continually scout ott out new sites for all manner of fossils and exposures.

I know there are a few members on here who would know where some exposures are. I’ve just never asked. But I do like the ammonites I’ve seen from those areas or any for that matter as I am also a lover of ammonites. I’m just beginning the journey of identification and a consistent pattern of regular hunting.

 

Part of the problem with finding new areas is that where I have found the exposures of those 2 formations they are in developed areas. I am reluctant to hunt in a creek that is in someone’s back yard. The Arcadia Park areas I’ve hunted have only produced abundant septarian nodules and the rare ammonite fragment. I know they exist though, because I see people post them on the Dallas Paleontological Society Facebook group. I didn’t get details, but one area must be an hour or more to the Northeast of Dallas. 

 

I have found a very productive Britton Formation, which is part of the Eagle Ford group. There are quite a large number of ammonite species in that area (I haven’t counted, but I think I have found around 12 species, which I have found). A few are medium size varieties and the occasional large. Fragments are abundant, while whole ones are hard to find. The remaining species I’d catagorize as micro, the majority being under 1 inch and micromorph heteromorphs ( not sure if micromorph implies heteromorph automatically or not). The small ones seem to be relatively abundant in the area, but you have to know how to look for them, because most are in concretions. The zone of the Britton is the Sciponoceras gracile zone and those baculite fragments are generally abundant.

 

I have many other sites I find mmonites in too, besides the Eagle Ford though. 

 

[PFOOLEY]

Thank you for the offer...same for you.

 

As for micromorphs, it is a reference to size not shape.

 

From the Journal of Paleontology Vol. 52, No. 2 (Mar., 1978), pp. 311-322.

 

On that note, this...

 

[pdf] Origin of the Grayson Micromorph Fauna (Upper Cretaceous) of North-Central Texas

 

...will be way more fun for you to read. 

[Innocentx]

@PFOOLEY. I found your second link didn't work, but looks like it would be interesting.  

[PFOOLEY]

@Innocentx, it is interesting! Google "pdf + micromorph grayson"...it should pop up as a direct download from this Forum.

 

I will try to connect the link...

 

EDIT...should be good now (as long as your device can read pdfs).

 

@Innocentx

[Innocentx]

50 minutes ago, PFOOLEY said:

Google "pdf + micromorph grayson".

I will, thanks.