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My Wife Found This In The Big Bend Area Here In Texas. Any Clue?


garylee23

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It actually has crystals growing around and inside the fossil. I know nothing about this. She was looking for geodes which are common in the area.

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You found a partial heteromorphic ammonite Allocrioceras hazzardi from the Boquillas Flags Formation, Turonian, about 90 million years old. Metoicoceras, Worthoceras, and Belemnitella co occur in this horizon, often seen as a capstone on the hilltops and ridges in the Boquillas Flags outcrop area. I only know this because I stumbled across a productive exposure of it after billy goating up a mountainside to get some space while on a club trip years ago near Study Butte, when everyone else was hunting a valley. I ended up high grading to about 30 specimens, which was all I could carry in my backpack, needing to remain hands-free for my precarious decent. Worth the effort.

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Grüße,

Daniel A. Wöhr aus Südtexas

"To the motivated go the spoils."

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...I guess the "Belemnites" could in reality be very weathered Sciponoceras gracile ammonites. Hoping for Belemnites though...they'd be the only ones I've found in Texas.

Grüße,

Daniel A. Wöhr aus Südtexas

"To the motivated go the spoils."

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Nice ones, why I have I not seen these before? (I got the impression this type of thing only came out of France but I knew that had to be incorrect!)

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there is a similar form, Allocrioceras annulatum, found in the upper britton formation of the dfw area. it is seen more frequently largely because the outcrop area is smack in the middle of a large group of collectors.

Grüße,

Daniel A. Wöhr aus Südtexas

"To the motivated go the spoils."

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Well this is the first time I've seen them from TX on this forum!

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