Chapter 9, Section 1: Relative Dating. Ahhh ! I’m not dating HER ! She’s my cousin!. Eewww ! No way!. 9.1 The beginnings of geology. In 1666, Nicholas Steno, a Danish anatomist , studied a shark’s head and noticed that the shark’s teeth resembled mysterious stones called “ tonguestones ”.
Ahhh! I’m not dating HER ! She’s my cousin!
Eewww! No way!
Use relative dating to determine which event – the foot step, the tire track, or the snow fall - happened first.
A stack of newspapers illustrates superposition. The oldest newspaper is on the bottom of the stack and the more recent newspapers are piled on, with the most recent on top.
The fossil record is the ordering of fossils
throughout geological time in layers of rock
that accumulate and form.
Use the illustration (above) to answer the following questions: Did human beings live at the same time as the dinosaurs? Did dinosaurs roam the earth at the same time as trilobites?
landmass, called Pangaea, about 250 million years ago.
● Fossils provide evidence for how Earth’s surface has changed over time.● Scientists map fossil locations.● Understanding Earth’s past helps explain how similar plants and animals ended up in different locations.
Huh? changed over time.
Did you know….that shark teeth are common fossils in Georgia and are the official state fossil? From the Cretaceous to the Miocene periods (approximately 10 to 70 million years ago) sharks hunted and stalked the coastal areas of Georgia. It is very rare to find a fossil of an actual carcass of these prehistoric sharks, but their teeth are found in sizable numbers due to the fact that sharks constantly lose and replace their teeth.