Search results
Results from the WOW.Com Content Network
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 Geologic Calendar is a scale in which the geological timespan of the Earth is mapped onto a calendrical year; that is to say, the day one of the Earth took place on a geologic January 1 at precisely midnight, and today's date and time is December 31 at midnight. [1]
Geologic time shown in a diagram called a geological clock, showing the relative lengths of the eons of Earth's history and noting major events The geological history of the Earth follows the major geological events in Earth's past based on the geological time scale , a system of chronological measurement based on the study of the planet's rock ...
Geologic time scale; List of fossil sites with link directory. List of timelines around the world. Logarithmic timeline shows all history on one page in ten lines. Orders of magnitude (time) Periodization for a discussion of the tendency to try to fit history into non-overlapping periods. Time. Planck Time
31.6 Ps (1000 Ma, 1 Ga): One giga-annum (Ga), one billion years, the largest fixed time unit used in the standard geological time scale, approximately the order of magnitude of an eon, the largest division of geological time. +1 Ga: The estimated remaining habitable lifetime of Earth, according to some models.
Geologic time is the timescale used to calculate dates in the planet's geologic history from its origin (currently estimated to have been some 4,600 million years ago) to the present day. Radiometric dating measures the steady decay of radioactive elements in an object to determine its age. It is used to calculate dates for the older part of ...
On Dec. 26, 2004, a 9.2-magnitude earthquake shook Southeast Asia, triggering the worst tsunami in recorded history. According to United Nations estimates, more than 220,000 people were killed ...
International Commission on Stratigraphy geologic time scale of Earth (4 C, 2 P, 1 F) M. Marine isotope stages (6 P) P. Phanerozoic geochronology (3 C)