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The following five timelines show the geologic time scale to scale. 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.
[[Category:Geological range graphical timeline templates]] to the <includeonly> section at the bottom of that page. Otherwise, add <noinclude>[[Category:Geological range graphical timeline templates]]</noinclude> to the end of the template code, making sure it starts on the same line as the code's last character.
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).
This clickable timeline template, wikilinked to over 30 Wikipedia articles, translated into over 30 languages, edited by over 110 editors, transcluded to over 100 articles, was originally derived from {{Life timeline}} for inclusion in the article "Timeline of the evolutionary history of life".
See Template:Geological range for more information. top_bar_ps Adds text after the "xxx Ma" text above the horizontal timeline. It is recommended not to use this parameter unless absolutely necessary. See Template:Geological range for more information. image_map Reconstruction of the Earth as it appeared during the geologic time span. caption_map
|left= optional - Sets the left padding of the timeline (in em) |labels= optional - Sets geological time labels to be displayed (era, period, epoch, age) Period options: cenozoic not functional - displays entire Cenozoic timescale; quaternary not functional - displays Quaternary timescale; neogene not functional - displays Neogene timescale
This template constructs a vertically arranged timeline. The editor defines 2D rectangles (bars) and optional annotations (notes). The header is customizable. A scale appears on the left, and annotations appear on the right. An optional legend appears at the foot. Has built-in compatibility for geological divisions.
The ages of more recent layers are calculated primarily by the study of fossils, which are remains of ancient life preserved in the rock. These occur consistently and so a theory is feasible. Most of the boundaries in recent geologic time coincide with extinctions (e.g., the dinosaurs) and with the appearances of new species (e.g., hominids).