exeptional preservation Flashcards
Pyritization
The process where organic materials are replaced by pyrite during fossilizatio
Silicification
The process where silica replaces the original material of a fossil
Mold and Cast
This is when a fossil leaves an imprint which is then filled in.
Carbonization
A process where organic material is reduced to a thin film of carbon, typically preserving plant fossils as dark carbon-rich impressions
Trace Fossil
Indirect evidence of past life, such as footprints, burrows, or feeding marks, which provide information about the behavior of organisms rather than what they look like
Body Fossil
Fossils that represent the actual physical remains of an organism, such as bones, teeth, shells, or plant leaves.
Replacement
A fossilization process in which the original material of an organism is replaced with minerals over time, typically preserving the structure but not the original material.
Precipitation
The process by which dissolved minerals in groundwater crystallize and form solid mineral deposits, often contributing to the fossilization of remains by mineral infill
Anoxic
An environment lacking oxygen, which slows down decomposition and helps preserve organic materials, such as in certain fossil-forming marine sediments
Anaerobic
Refers to conditions or organisms that exist in the absence of oxygen. Anaerobic environments help in fossil preservation by limiting decay processes driven by oxygen-dependent organisms
Decomposition
The breakdown of organic matter by biological or chemical processes. In fossilization, rapid burial or anoxic conditions slow decomposition, allowing preservation.
Dissolving
The process where minerals or organic material dissolve due to chemical interactions with water, often creating spaces or cavities that can later be filled with minerals
Groundwater
Water that exists below the Earth’s surface, which plays a role in fossilization by depositing minerals during processes like silicification or replacement.
Hard Parts
The durable components of organisms, such as bones, teeth, shells, or exoskeletons, which are more likely to fossilize than soft tissues.