The ______________ states that an igneous rock is younger than the rock layers it has disturbed.
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[Ques. 2] When rocks and geologic events are placed in chronological order without regard to actual dates, ______________ geologic time is obtained.
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[Ques. 3] Petrified wood is a common type of ______________ fossil.
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[Ques. 4] A fossil imprint made by the movement of an animal is called a(n) ______________ fossil.
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[Ques. 5] The oldest algal fossils are found on the continent of ______________.
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[Ques. 6] The earliest evidence of prehistoric life is the single-celled organisms called ______________.
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[Ques. 7] New material filling a mold forms a(n) ______________ of the original shell or bone.
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[Ques. 8] The hollow depression left when a shell or bone is dissolved completely out of a rock is called a(n) ______________.
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[Ques. 9] The Petrified National Forest is found in the state of ______________.
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[Ques. 10] Fossilized tree resin is called ______________.
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