Blog 10

This is from my observation of the fossil in class. I found out, through the wonders of the internet, that this fossil is called Exogyra erraticostata and is found in Texas' Austin Chalk.

Outside
5” long about 3 pounds
Shell-like.
Ridges
Curve in shape, spiral
Towards the spiral it is smoother, like a seashell, with subtle ridges
Where it gets larger in shape the ridges are paper thin but the layers are more noticeable.
It is choppy in the back, like it was broken
In between the layers there are air pockets where tiny pieces of sand are imbedded.
Dark grey, light grey, white specks
Back side, where you can see the inside layers perfectly, light brownish color.
Looks like a rock layers
Large holes like something was attached to it

Inside
Deep
Smooth
Light, crème color
Flaky, dried up pie crust.
Rust
Outside
5” long about 3 pounds
Shell-like.
Ridges
Curve in shape, spiral
Towards the spiral it is smoother, like a seashell, with subtle ridges
Where it gets larger in shape the ridges are paper thin but the layers are more noticeable.
It is choppy in the back, like it was broken
In between the layers there are air pockets where tiny pieces of sand are imbedded.
Dark grey, light grey, white specks
Back side, where you can see the inside layers perfectly, light brownish color.
Looks like a rock layers
Large holes like something was attached to it
Inside
Deep
Smooth
Light, crème color
Flaky, like dried up pie crust.
Rust stains