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the perserved trace, imprint, or remains of a plant or animal


the process of turning some plant material into stone by infiltration with water carrying mineral particles without changing the original shape


shape or influence


A vertebrate possessing two pairs of limbs, such as amphibians, reptiles, birds, and mammals.


a type of body fossil that forms when crystals fill a mold or sediments wash into a mold and harden into rock


shallow prints or marks in rocks


Hollow in the ground in which natural tar accumulates by seepage.., Hollow in the ground in which natural tar accumulates by seepage


a deep yellow color


a soft heavy toxic malleable metallic element

trace fossil

a type of fossil that provides evidence of the activities of ancient organisms


to develop gradually by process of growth and change


a white, radioactive metallic chemical element that weighs more than any other element in nature.


having two feet

Radioactive dating

technique in which scientists calculate the age of a sample based on the amount of remaining radioactive isotopes it contains

geologic time scale

a chronological arrangement of geologic time subdivided into units


a scientist who studies fossils to learn about organisms that lived long ago

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