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Why is there correspondence between mass extinction and the ends of geological periods?
Wiki User
∙ 13y ago
Because mass extinction events marked the loss of a number of a species to fill the available ecological niches, these events correspond to geological period boundaries.
Wiki User
∙ 13y ago
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What do periods on the geologic time scale represent?
An era, in geologic terms, is a geological time period encompassing two or more geologic periods.
What are subdivisions of a geological eras?
Periods are subdivisions of geological eras.
When did the Cretaceous Tertiary extinction occur?
About 65.5 million years ago. The Cretaceous and Tertiary are geological time periods either side of this event. The event is significant because there was a large mass extinction event at this time including the extinction of all non avian dinosaurs. Most experts agree that the cause of the extinction was a asteroid impact.
What do the periods the geologic time scale represent?
Usually, they represent periods between extinction events, where a particular type of lifeform was dominant.
Geological eras can be divided into .?
Geological eras can be divided into periods, epochs and ages.
The last mass extinction of dinosaurs on Earth occurred between which two geologic periods?
asteroid attack
In geological time eras divide into?
periods
What is the KT asteroid?
It is the asteroid that hit the Earth 65 million years ago and contributed to the extinction of the dinosaurs. It impact crater is located in Chicxulub which is in the Yucatan peninsula, it is buried deep underground. KT refers to the geological transition between the Cretaceous and the Tertiary periods. (Cretaceous in German starts with a K)
What do periods in the geological time scale represent?
the hood
What are divisions on the geological time scale called?
Periods
How were the geological time periods named?
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How were the periods divided in the geological time scale?
The longest periods of the geological time scale are eons. Each eon is divided into eras and each era is made up of periods, which are further divided into epochs. Each division ended when a significant geological event occurred, such as a major ice age ending or a meteor impact resulting in a mass extinction of animal life, etc.
