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Bad White [126]
3 years ago
6

A rock inclusion in a basalt lava flow is dated at 56 Ma. This means the lava flow must have occurred _______ 56 Ma.

Geography
2 answers:
Tamiku [17]3 years ago
8 0

Answer:

after

Explanation:

The rock inclusions are older than the rock that is surrounding them. In this case, we have a rock inclusion that is dated to 56 Ma. It is an inclusion in basalt. This means that the lava flow, as it was moving in that area managed to get the rock inclusion, and as the lava started to cool off, it consolidated and trapped the rock inclusion in it for time to come. This makes up for a very interesting appearance of the rocks, as there is the basis, being all from the same type of mineral, and then inside of the uniform rock mass, there is a totally different smaller piece of rock sticking out.

Andreas93 [3]3 years ago
7 0

Answer:Unlike catastrophism, _______ states that mountains formed slowly over time.

William Smith was working as a surveyor in the late eighteenth century. He noticed that certain fossils were found in certain layers of sedimentary or igneous rock, that the same order of strata could be found in areas that were far apart, and these strata contained similar _______.

Isotopic dating relies on a process called _______, where heavier radioisotopes transform into lighter elements.

The Permian Period lasted from 299 Ma to 251 Ma. This means that the Permian Period lasted _______ years.

A rock inclusion in a basalt lava flow is dated at 56 Ma. This means the lava flow must have occurred _______ 56 Ma.

Respond to the following based on your reading.

You are trying to assign a date to a layer of tephra. While examining the tephra, you notice that it contains several shale inclusions. If you determine that the dates of the shale inclusions range from 910 ka to 1.3 Ma. What can you say about the age of the tephra layer?

Explanation:answer:

1.Uniformitarianism

2.fossils

3.radioactive decay

4.48 million

5.after

6.The youngest age of the shale is 910 ka. According to the principle of inclusions, the shale formed before the tephra, so the tephra must be younger than 910 ka.

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