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The geologic time scale or geological time scale (GTS) is a representation of time based on the rock record of Earth. It is a system of chronological dating that uses chronostratigraphy (the process of relating strata to time) and geochronology (a scientific branch of geology that aims to determine the age of rocks).
The first shows the entire time from the formation of the Earth to the present, but this gives little space for the most recent eon. The second timeline shows an expanded view of the most recent eon. In a similar way, the most recent era is expanded in the third timeline, the most recent period is expanded in the fourth timeline, and the most ...
This page was last edited on 30 October 2021, at 06:37 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
This page was last edited on 24 December 2021, at 03:13 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.
Cato, a Tragedy is a play written by Joseph Addison in 1712 and first performed on 14 April 1713. It is based on the events of the last days of Marcus Porcius Cato Uticensis (better known as Cato the Younger) (95–46 BC), a Stoic whose deeds, rhetoric and resistance to the tyranny of Julius Caesar made him an icon of republicanism, virtue, and liberty.
A first application of this concept of dynamical time was the definition of the ephemeris time scale (ET). [1] [2] In the late 19th century it was suspected, and in the early 20th century it was established, that the rotation of the Earth (i.e. the length of the day) was both irregular on short time scales, and was slowing down on longer time ...
The free-fall time is the characteristic time that would take a body to collapse under its own gravitational attraction, if no other forces existed to oppose the collapse.. As such, it plays a fundamental role in setting the timescale for a wide variety of astrophysical processes—from star formation to helioseismology to supernovae—in which gravity plays a dominant ro
In many real world applications, a first-hitting-time (FHT) model has three underlying components: (1) a parent stochastic process {()}, which might be latent, (2) a threshold (or the barrier) and (3) a time scale. The first hitting time is defined as the time when the stochastic process first reaches the threshold.