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Paleontology Crossword Puzzle

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Across
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A way in which organisms are fossilized and preserved in sticky tree sap.
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The current era "Age of Mammals".
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A group of living organisms consisting of similar individuals capable of exchanging genes or interbreeding.
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A mark or cavity made in a sedimentary rock by a shell or other body parts
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A fossil that is found in rock layers from only one geologic age and is used to establish the age of the rock
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Remains of one living animals
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A fossilized mark that shows activity or movement of an animal
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A major division of geological time
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A unit of geologic time.
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Principle that states that sediments will be deposited in horizontal layers
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A principle that states that the geologic processes that happened in the past are the same geologic processes that occur today.
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An event or object that happens suddenly.
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Gradual development especially from a simple to more complex form.
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No longer existing
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The death of every member of a species
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The principle that states that states that younger rocks lay above older rocks if the layers have not been disturbed
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something that incites to action or exertion or quickens action, feeling or thought
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Supercontinent
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A person who studies fossils
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A method of determining whether an event or object is older or younger than another
Down
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To produce one or more types of organisms
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Process in which minerals replace an organism's tissues
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True age of a rock or fossil
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the act or process of putting people or things into groups based on ways that they are alike
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The existence of many types of plants and animals in the environment
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one's family or ethnic descent
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Natural selection is the differential survival and reproduction of individuals due to differences in phenotype.
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The geological time scale is a system of chronological measurement that relates geologic strata to time, and is used by geologists, paleontologists to describe the timing and relationships between events that have occurred throughout Earth’s history.
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A type of fossil that forms when sediments fill in the cavity left by a decomposed organism.
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A way in which organisms have been fossilized by being trapped and preserved in stick thick pools.