preserved remains or evidence of an ancient organism
The process by which organic material is turned into stone.
|mold||a fossil formed when an organism buried in sediment dissolves, leaving a hollow area|
a type of body fossil that forms when crystals fill a mold or sediments wash into a mold and harden into rock
yellowish brown fossil resin that often has particles trapped inside
Thin object falls into sediment can leave an imprint when sediment hardens.
Formed when a dark sticky form of oil seep up from underground causing animals to get stuck
a vertebrate animal having four feet or legs or leglike appendages
|paleontologist||scientist who studies fossils|
a type of fossil that provides evidence of the activities of ancient organisms
|evolved||to develop gradually by process of growth and change|
|bipedal||having two feet|
|geologic time scale||scale used by paleontologists to represent evolutionary time|
|radioactive dating||technique in which scientists calculate the age of a sample based on the amount of remaining radioactive isotopes it contains|
|uranium||a white, radioactive metallic chemical element that weighs more than any other element in nature.|
a soft heavy toxic malleable metallic element
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- "tar pit" image
- "tetrapod" image
- "trace fossil" image
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