Home | Sites | Formations | Fossils | Types | Resources | Paleomaps | Diagrams | List | Contact| Weather |
| Group | Order | Common | count |
|---|---|---|---|
Lamniformes |
mackerel sharks | 16 | |
zNone |
2 |
>Order: Lamniformes
Formation: Eagle Ford/Atco
Grayson County | PO-587
Formation: Eagle Ford/Atco
Grayson County | PO-594
Formation: Eagle Ford/Atco
Williamson County | 68
Formation: Eagle Ford/Atco
Grayson County | PO-588
Formation: Eagle Ford/Atco
Grayson County | PO-589
Formation: Eagle Ford/Atco
Grayson County | PO-590
Formation: Eagle Ford/Atco
Grayson County | PO-591
Formation: Eagle Ford/Atco
Grayson County | PO-592
Formation: Eagle Ford/Atco
Grayson County | PO-628
Formation: Eagle Ford/Atco
Grayson County | PO-593
Formation: Eagle Ford/Atco
Grayson County | PO-586
Formation: Eagle Ford/Atco
Grayson County | PO-629
Formation: Eagle Ford/Atco
Grayson County | PO-595
Formation: Eagle Ford/Atco
Grayson County | PO-596
Formation: Eagle Ford/Atco
Grayson County | PO-597
Formation: Eagle Ford/Atco
Grayson County | PO-630
>Order: zNone
Formation: Stone City
Burleson County | WB-390
Formation: Eagle Ford/Atco
Williamson County | W2-603
1-root/robust root
2-bourlette
3-serrations
4-root notch
5-crown
6-cusp
7-enamel
| Period | Formation | count |
|---|---|---|
| Cretaceous | Eagle Ford/Atco | 17 |
| Eocene | Stone City | 1 |