Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
20 Cards in this Set
- Front
- Back
|
Calcareous |
refers to substances containing or composed of calcium carbonate |
|
|
Trilobite |
1st arthropods found in the Cambrian period of the Paleozoic Era |
|
|
Carbon Film |
thin layer of carbon remains of past life found in sedimentary rock |
|
|
Clastic |
rock or sediments made up primarily of broken fragments of pre-existing rocks or rock minerals |
|
|
Compression |
the decrease in the volume of a fossil caused by forces |
|
|
Hardness |
the resistance of minerals to scratching |
|
|
Diagenesis |
all of the changes that occur in a fossil after it is buried |
|
|
Ichnofossils |
trace fossils of the preserved tracks or other signs of animals in the substrate; the animal itself is rarely found |
|
|
Fossil |
any evidence of past life on Earth |
|
|
Silicification |
process where silica (glass) replaces original material (found in plants) |
|
|
Limestone |
non-clastic sedimentary rock produced from calcium carbonate (calcite) and sediments; main source is the slimy ooze formed in the ocean |
|
|
Taphonomy |
study of what happens to a fossil |
|
|
Marl |
marine sediment in which a fossil or crystal is embedded |
|
|
Replacement |
remains of an organism is replaced by phosphate |
|
|
Morphology |
study of form and structure of animals and plants and their fossils remains |
|
|
Cast |
an impression left in rock |
|
|
Paleobiology |
biological study of fossils |
|
|
Sedimentary Rocks |
pressurized sand, silt or clay becomes sandstone or limestone |
|
|
Mass Extinction |
huge numbers of species disappeared in a short period of time |
|
|
Geologic Time Scale |
a record of the history of life |
