You just discovered amebelodon, a shovel-toothed elephant, and you are trying to figure out how old it is. as you examine the sediment you discover a couple species of dinoflagellates that were previously studied and dated. nelsoniella aceras lived between 80-85 million years ago and odontochitina lived between 68-82 million years ago. based on fossil correlation how old is amebelodon? a) 68-85 million years old b) 80-82 million years old c) 81 million years old d) 79 million years old e) d = d0 + n(t) (eî»t − so i have no idea!

Option (A)

Explanation:

Amebelodon refers to the ancestor of elephants which were extinct a long time back and they belonged to the Amebelodontidae group of proboscideans. They are closely related to the modern day elephants and the early mammoths. They were comprised of shovel-teeth.

In the given condition, a shovel-tooth of an Amebelodon elephant is found in the sediments, which was associated with two other couple species of dinoflagellates, whose age is previously noted. The two species are Nelsoniella aceras and Odontochitina, which were about 80-85 million years ago and 68-82 million years ago respectively.

Since the Amebelodon tooth and the other two dinoflagellate fossil species are found in the same sediments, one can apply the principle of biostratigraphy, and determine the relative age of the rocks. Biostratigraphy refers to the correlation of rocks based on the presence of fossils.

Thus, the age of the Amebelodon will be somewhere between the range of 68-85 million years old.

Hence, the most appropriate answer is option (A).

the first plants to make the transition

explanation:

since there isn't any suggested answers i will give you the reason and hopefully you can figure it

south africa, or rather all of africa, has not been in the location in which it is nowadays throughout the geological past. after the super-continent pangaea started to break apart, gondwanaland, in which was africa, moved further south, and parts of it came to be very close to the south pole. because the climate in this part of the world is very cold due to the very dispersed sun rays in there, what is now south africa, started to freeze, and the conditions were right for the formation of glaciers. the glaciers existed up until the period when gondwanaland started to break apart and what is now africa started to move towards north, sp it warmed up and the glaciers melted.