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Usually, an era refers to a specific time period, normally associated with the dates of an important event, while a period is often used to refer to events that share a characteristic, but do not have exact dates.
The words are sometimes used interchangeably, and it isn't necessarily wrong to do so, since the usage is varied, but traditionally a period has been shorter than an era.
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Was era or period longer?
On the geologic time scale, an era is longer than a period. There are 12 geologic eras in total and they are composed of geologic periods. For instance, the Mesozoic era is composed of the Triassic, Jurassic and Cretaceous periods.
Is A geologic era is a shorter unit of time than a geologic period?
No, a geologic era is a longer unit of time than a geologic period. Geologic eras are divided into periods, which are further subdivided into epochs. The hierarchy from largest to smallest is era, period, epoch.
Which is longer era or period?
In geological time the Eon is larger than the Period. The Eon is the largest division of geological time recognised by the International Commission of Stratigraphic.The ICS have divided the time as such from largest to smallest.Super-Eon - (SuperEonothem) (Not recognised by the ICS but unofficially recognised e.g. Precambrian time)Eon - (Eonothem)Era - (Erathem)Period - (System)Subperiod - (SubSystem)Epoch - (Series)Age - (Stage)Chron - (Chronozone) (Not recognised by the ICS but is unofficially recognised usually based on reversal of earths magnetic field)
What is smaller than both an era or a period?
An epoch is smaller than an era or a period.
What is smaller than an era or a period?
An epoch is typically smaller than an era or a period in geological or historical scales.
Jurassic is the period of what era?
It really wasn't an era. An Era was a much longer period of time. It was called the "Jurassic Period".
Which is larger an era or an epoch?
An epoch is longer than an era. An epoch can last for more than one lifetime.
What division of geologic time is smaller than an era?
A period is smaller than an era in the geologic time scale. It is further subdivided into epochs and ages.
What is. An era?
An era is a time period of indeterminate length, or, geologically speaking, a unit of time, smaller than aeons and greater than periods.
What is a time span shorter than an era such as quaternary?
A Period
What is the longest - Jurassic period Carboniferous period Paleozoic era or Mesozoic era?
The Paleozoic era represents the longest timespan from the list. It ran from 542 to 251 million years ago, a total time of 291 million years. It is also worth noting that an era always represents a longer timespan than a period and in fact an era will be composed of a number of periods. For completeness, the other time spans mentioned in the question are given further detail below: The Mesozoic era ran from 251 to 65.5 million years ago. A timespan of 185.5 millions years The Carboniferous period ran from 359.2 to 299 million years ago, A timespan of 60.2 millions years. The Carboniferous period is one of the subdivisions of the Paleozoic era. The Jurassic period ran from 199.6 to 145.5 million years ago. A timespan of 54.1 millions years. The Jurassic period is one of the subdivisions of the Mesozoic era. For further information, please see the related links.
What era is longer than all the rest of the eras combined?
Proterozoic
