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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
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
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