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The earth is CONSTANTLY CHANGING

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Age of Mammals

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the longest of all eras

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when dinosaurs thrived

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Precambrian.

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Mesozoic

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the longest of all eras

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when dinosaurs thrived.

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Precambrian

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First form of life appeared - Google Search

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Mesozoic

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the remains or impression of a prehistoric

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living things die and their remains are covered by sediments.

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the process of determining an age on a specified chronology

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study of fossils

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current geological epoch

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smallest to greatest time frame.

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The act of superposing or the state of being superposed

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An object formed by the solidification of molten liquid

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rocks cool and solidify quicker than intrusive igneous rocks

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types of rock that are formed by the depositio

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arise from the transformation of existing rock types

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a geological record of biological activity.

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when minerals replace all or part of an organism

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the current geological era, covering the period from 66 million years ago

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Paleozoic, Cenozoic, and Mesozoic

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a basic law of geochronology

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has formed through the deposition and solidification of sediment

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Preserved Remains

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4.6 billion years

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How old is the Planet Earth definition - Google Search

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The layers of the rocks are the pages in our history book.

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he science of determining the relative order of past events

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Fossil is an impression left by the original organism - mold 

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Fossil is an impression left by the original organism - mold 

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an organism or organism's body or body part leaves in the sediment

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Fossil is an impression left by the original organism - mold definition - Google Search

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a type of trace fossil

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the process by which organic material becomes a fossil.

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Organisms buried in sediment may decay or dissolve away leaving a cavity.

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the net response caused by two or more stimuli.

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Principle of superposition - Google Search

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waves linear superposition physics superposition theorem electric field differential equations destructive interference forces constructive interference structural analysis

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Defined in the authoritative Glossary of Geology as the fundamental principle.