Question

you find a fossil embedded in rock strata as shown the picture below that shows the age of each layer. value: 10 what do you estimate is the age of this fossil? a) at least 275 mya b) at least 290 mya c) at least 305 mya d) at least 320 mya e) at least 335 mya a. at least 350 mya b. at least 365 mya c. at least 380 mya d. at least 395 mya e. at least 410 mya f. a lot older than 410 mya

Explanation:

In geology, the principle of superposition states that in undisturbed sedimentary rock layers (strata), the oldest layers are at the bottom and the younger layers are on top. A fossil embedded in a rock layer is at least as old as that layer. Looking at the given strata, the fossil - containing layer is above the 395 mya layer and below the 380 mya layer. So the fossil is at least 380 million years old.

Answer:

c. at least 380 mya