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2014-09-27 Dps Jacksboro Field Trip

LanceH

By LanceH
in Fossil Hunting Trips

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LanceH Regular Member

LanceH

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The Dallas Paleo Society just had their annual field trip to the great Finis shale exposure at Lake Jacksboro. Roz and I went and I recognized DPS regulars BobWill, PollyM, JohnC, MarkM, and a few fairly new people. The group was about 15 adults and several kids but most everyone left pretty early except us and 2 others.

I found 5 shark teeth (3 types) in various levels of complete-ness (typical) and a few really good invertebrate shells.

This gorgeous large "Worthenia" was the first thing I spotted:
post-11-0-04816400-1411916592_thumb.jpg post-11-0-54562600-1411916593_thumb.jpg

brachiopod:
post-11-0-17510400-1411916599_thumb.jpg

"Conularia":
post-11-0-05269200-1411916603_thumb.jpg

"Brachycycloceras" (not the current name):

post-11-0-07105100-1411916597_thumb.jpg

"Petalodus" tooth (only found root and half the blade)

post-11-0-74953800-1411916594_thumb.jpg post-11-0-74862600-1411916595_thumb.jpg

"Cladodus/Symmorium" tooth (found 3 bases)

post-11-0-94707200-1411916600_thumb.jpg post-11-0-04587300-1411916602_thumb.jpg

"Aggasizodus" (old name) symphysial tooth?
post-11-0-06185400-1411916590_thumb.jpg
(Chondrichthyphiles please help with this)

post-11-0-26139500-1411917338_thumb.jpg

Edited by LanceH
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Shamalama Regular Member

Shamalama

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Looks like a fun crawl. Thanks for sharing your finds!

-Dave

__________________________________________________

Geologists on the whole are inconsistent drivers. When a roadcut presents itself, they tend to lurch and weave. To them, the roadcut is a portal, a fragment of a regional story, a proscenium arch that leads their imaginations into the earth and through the surrounding terrain. - John McPhee

If I'm going to drive safely, I can't do geology. - John McPhee

Check out my Blog for more fossils I've found: http://viewsofthemahantango.blogspot.com/

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LanceH Regular Member

LanceH

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The other "Cladodus/Symmorium" tooth
post-11-0-95881400-1411921286_thumb.jpg

Also "Lophophyllidium spinosum" and "Lophophyllidium proliferum" corals

post-11-0-26741600-1411919430_thumb.jpg post-11-0-04575800-1411919432_thumb.jpg

a weird little mystery fossil

post-11-0-47570100-1411919433_thumb.jpg

The surface is like a thin veneer and no bone behind meaning it was hollow so I'm gonna speculate it's some kind of arthropod appendage.

and a scorpion
post-11-0-87320200-1411921305_thumb.jpg

Edited by LanceH
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BobWill Regular Member

BobWill

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Good haul. You always seem to find teeth out there. Mark was gathering cartilage out in the flats...two bags full! For me it was a happy conulariid day. Found a couple dozen nice ones.

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JohnBrian Regular Member

JohnBrian

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I see all kinds of stuff in your photos--- mostly shells & other unidentified (to me) stuff.

Nice finds!

----------------------------------------------------------------------------

:popcorn: John

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kauffy Regular Member

kauffy

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Love the in situ photos!

"Turn the fear of the unknown into the excitment of possibility!"


We dont stop playing because we grow old, we grow old because we stop playing.

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LanceH Regular Member

LanceH

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Hey Lance. Nice stuff. Can I ask what a conularia is?

RB

Ummm, no one really knows last time I researched them. There's no modern analog yet it has a long geologic history.

There's speculation it's related or was similar to solitary corals. It has a square cross section chitinous shell. They are not nautiloids or scaphopods.

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BobWill Regular Member

BobWill

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I'll answer. No one knows. Well, at least not for sure. They're pretty sure it's a kind of jellyfish because of some internal structure found on some but not everyone agrees. There's even disagreement on whether they are anchored at the small end or free floating!

Oh, didn't see Lance's answer

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LanceH Regular Member

LanceH

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Conularia are so pretty and mysterious. I just wish people would stop trying to collect dozens at a time and only take a few good examples. I've heard tale of people who have Mason jars full of them. Some people just have no self control or respect for sites and other collectors.

post-11-0-96134100-1412020423_thumb.jpg

These are from my first trip there in Nov 2005

Edited by LanceH
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Fossildude19 Regular Member

Fossildude19

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Whoa!!! :blink:

Awesome finds, and great pics/trip report!

I enjoy these reports, immensely!

Thanks for posting, Lance.
Regards,

    Tim    -  VETERAN SHALE SPLITTER

   MOTM.png.61350469b02f439fd4d5d77c2c69da85.png      PaleoPartner.png.30c01982e09b0cc0b7d9d6a7a21f56c6.png.a600039856933851eeea617ca3f2d15f.png     Postmaster1.jpg.900efa599049929531fa81981f028e24.jpg    VFOTM.png.f1b09c78bf88298b009b0da14ef44cf0.png  VFOTM  --- APRIL - 2015  

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"In every walk with nature one receives far more than he seeks."
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Texas Fossil Hound Regular Member

Texas Fossil Hound

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Great to see you, Roz and Mark out at the Jacksboro site last weekend. We know who the die hard hunters are! I will post my finds soon. Still cleaning!!

Jon

"Silence is Golden, but duct tape is Silver."

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  • 3 weeks later...
Wrangellian Regular Member

Wrangellian

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I love these reports from that site too! Nice spiny brach and coral, and the 'Brachycycloceras' is interesting too - stubby nautiloid!

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