Stage (stratigraphy)
Unit in stratigraphy / From Wikipedia, the free encyclopedia
Dear Wikiwand AI, let's keep it short by simply answering these key questions:
Can you list the top facts and stats about Stage (geology)?
Summarize this article for a 10 year old
SHOW ALL QUESTIONS
In chronostratigraphy, a stage is a succession of rock strata laid down in a single age on the geologic timescale, which usually represents millions of years of deposition. A given stage of rock and the corresponding age of time will by convention have the same name, and the same boundaries.
More information Segments of rock (strata) in chronostratigraphy, Time spans in geochronology ...
Segments of rock (strata) in chronostratigraphy | Time spans in geochronology | Notes to geochronological units |
---|---|---|
Eonothem | Eon | 4 total, half a billion years or more |
Erathem | Era | 10 defined, several hundred million years |
System | Period | 22 defined, tens to ~one hundred million years |
Series | Epoch | 34 defined, tens of millions of years |
Stage | Age | 99 defined, millions of years |
Chronozone | Chron | subdivision of an age, not used by the ICS timescale |
Close
Rock series are divided into stages, just as geological epochs are divided into ages. Stages are divided into smaller stratigraphic units called chronozones or substages, and added together into superstages.[2]
The term faunal stage is sometimes used, referring to the fact that the same fauna (animals) are found throughout the layer (by definition).