I would say these would be transform boundaries where the tectonic energy appears to be transformed from one plate to another such as off the coast of Guatemala so it is not a simple process of subduction,.
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Depending on the amount of liquid he has, he can use it to fill each test tube. he can do 8 orders per test tube :D
Covers one half of the earth is not a characteristic because deserts simply do not cover half the earth
Yes it is good sir happy fave