A tooth fossil that once belonged to a prehistoric shark.
Species: Squalicorax
Era: Cretaceous (100–70 million years ago)
Location: Kansas
This listing is for one tooth fossil. This image is a representation of what you can expect to receive. You may not receive these exact specimens, but similar. Most teeth are around ¾ – 1¼" wide and serrated. All specimens are ethically sourced.
This table contains the geological time periods of the past 2.5 billion years on Earth to aid in understanding age immense age of these fossils.
(Ma = Mega-annum = 1,000,000 years)| EON | ERA | PERIOD | EXTENT (Ma) | DURATION (Ma) |
|---|---|---|---|---|
| Phanerozoic | Cenozoic | Quaternary | 2.588–Present | 2.588+ |
| Neogene | 23.03–2.588 | 20.4 | ||
| Paleogene | 66.0–23.03 | 42.9 | ||
| Mesozoic | Cretaceous | 145.5–66.0 | 79.5 | |
| Jurassic | 201.3–145.0 | 56.3 | ||
| Triassic | 252.17–201.3 | 50.9 | ||
| Paleozoic | Permian | 298.9–252.17 | 46.7 | |
| Carboniferous | 358.9–298.9 | 60 | ||
| Devonian | 419.2–358.9 | 60.3 | ||
| Silurian | 443.4–419.2 | 24.2 | ||
| Ordovician | 485.4–443.4 | 42 | ||
| Cambrian | 541.0–485.4 | 55.6 | ||
| Proterozoic | Neoproterozoic | Ediacaran | 635.0–541.0 | 94 |
| Cryogenian | 850–635 | 215 | ||
| Tonian | 1,000–850 | 150 | ||
| Mesoproterozoic | Stenian | 1,200–1,000 | 200 | |
| Ectasian | 1,400–1,200 | 200 | ||
| Calymmian | 1,600–1,400 | 200 | ||
| Paleoproterozoic | Statherian | 1,800–1,600 | 200 | |
| Orosirian | 2,050–1,800 | 250 | ||
| Rhyacian | 2,300–2,050 | 250 | ||
| Siderian | 2,500–2,300 | 200 | ||
CROW SHARK
The crow shark lived around the world 70–100 million years ago. The significance of the fossils of this species’ is not what has been found, but where they’ve been found. Nearly complete crow shark skeletons have been discovered in the land-locked areas of Wyoming, South Dakota, and Kansas, providing concrete evidence that the North American continent used to be divided in two by a midcontinental seaway connecting the Arctic Ocean to the Gulf of Mexico.
