Most of the time periods were named by English men, and they are named after ancient Welsh tribes. Most of the other time periods were named by the people who defined them and using the method they preferred.
The periods of the Paleozoic Era are named for the locations where the rock formations that represent these time periods were first studied and defined. Examples include the Cambrian period (named after Cambria, the Latin name for Wales) and the Devonian period (named after Devonshire, England).
Eras and periods on the geologic time scale are often named based on significant geological events, key fossil groups, or regional stratigraphy that characterize that time interval. For example, the Triassic Period is named after the three distinct rock layers found in Germany. The Cretaceous Period is named after the Latin word "creta," meaning chalk, due to the abundant chalk deposits from this time.
The time periods of the Paleozoic and Mesozoic are subdivided into early middle and late instead of named epochs as they are in Cenozoic periods is due to the basis of the occurrence of particular fossils. It is also based upon the absence or appearance of geological horizons.
The two periods involved in the Pangea time frame were the Permian and Triassic periods during the Paleozoic and Mesozoic eras, respectively. These periods encompassed the formation and breakup of the supercontinent Pangea.
The table you are referring to is likely the Geologic Time Scale. It divides Earth's history into different time periods based on significant events and changes in the planet's geology, climate, and life forms. These time periods are typically grouped into eons, eras, periods, epochs, and ages.
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The periods of the Paleozoic Era are named for the locations where the rock formations that represent these time periods were first studied and defined. Examples include the Cambrian period (named after Cambria, the Latin name for Wales) and the Devonian period (named after Devonshire, England).
Eras and periods on the geologic time scale are often named based on significant geological events, key fossil groups, or regional stratigraphy that characterize that time interval. For example, the Triassic Period is named after the three distinct rock layers found in Germany. The Cretaceous Period is named after the Latin word "creta," meaning chalk, due to the abundant chalk deposits from this time.
Many periods are named after places where rocks from those periods are found. For example the Jurassic period is named after the Jura Mountains in the Alps.
Geologic time periods are named based on significant events, fossils, or rock layers found within that specific time frame. For example, the Jurassic Period is named after the Jura Mountains in Switzerland where rocks from that time were first studied. The names are often chosen to reflect the unique characteristics of that period in Earth's history.
periods
The Louisiana Purchase was enacted in 1803. This was during the time of Napoleon Bonaparte and so named the Napoleonic period.
The time periods are called quarters and there are four of them.
The Victorian Age or Era was named after Queen Victoria of England.
Geologic time consists of eons, eras, periods, epochs, and ages. These measure periods of billions or millions of years.
Most geologic periods are named for the location where rock formations were first found that contained fossils from that period, some others (e.g. Carboniferous) were named for materials associated with the fossils.
The time periods of the Paleozoic and Mesozoic are subdivided into early middle and late instead of named epochs as they are in Cenozoic periods is due to the basis of the occurrence of particular fossils. It is also based upon the absence or appearance of geological horizons.