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Paleontology Crossword Puzzle

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