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______ discovered Sea floor spreading. He noticed that it was like a conveyor belt with new material on top and old material on the bottom, or destroyed.
______boundaries are found in Island arcs. They are made after island arcs collide and create mountains.
_____ is an unconformity in which younger sedimentary strata lies on top and older metamorphic rock is on the bottom.
______is an unconformity in the older rocks dip at a different angle than the younger rocks. The folded or tilted rock has lateral continuity.
________is an unconformity principle that states that all layers of sediment initially extend laterally in all directions.
The time required for one half of the atoms of a radioactive substance to decay is best known as the ________.
The _________ states that in any undeformed sequence of sedimentary rocks or surface-deposited igneous materials, each layer is older than the one above it and younger than the one below it.
Law of superposition
Explain the Relationship of the Principle of Inclusions.
The Rock that contains the inclusions is the younger of the two.
Explain the Law of Cross Cutting
If any rock cross cuts another rock, then its younger than the rock it cross cut.
The ________ states that layers of sediment are originally deposited horizontally under the action of gravity.
Law of Original Horizontality
The environmental relationship between lateral facies and vertically-stacked strata is known as _________.
The observation that a group of fossil plants and animals follow or succeed each other in time in a predictable manner is the ________.
principle of faunal succession
The principle of _______uses fossils and evidence of past life to help determine the relative age of the rock that they are found in.
Principle of Faunal Succession
The principle of_______states that fossils only appear during the time period that the creature was alive, so you can date layers based on their fossils
Principle of Floral Succession
The concept that Earth's crust is floating in gravitational balance upon the material of the mantle is ______.
A subdivision of the mantle situated below the lithosphere is the _______. The rock within this zone is easily deformed.
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