geologic time


Also found in: Thesaurus, Encyclopedia, Wikipedia.
Related to geologic time: relative geologic time
click for a larger image
geologic time

geologic time

n.
The period of time covering the physical formation and development of Earth, especially the period prior to human history.

ge′olog′ic time′


n.
the succession of eras, periods, and epochs as considered in historical geology.
[1860–65]
click for a larger image

ge·o·log·ic time

(jē′ə-lŏj′ĭk)
The period of time covering the formation and development of the Earth, from about 4.6 billion years ago to today.
ThesaurusAntonymsRelated WordsSynonymsLegend:
Noun1.geologic time - the time of the physical formation and development of the earth (especially prior to human history)geologic time - the time of the physical formation and development of the earth (especially prior to human history)
time - the continuum of experience in which events pass from the future through the present to the past
eon, aeon - the longest division of geological time
geological period, period - a unit of geological time during which a system of rocks formed; "ganoid fishes swarmed during the earlier geological periods"
geological era, era - a major division of geological time; an era is usually divided into two or more periods
epoch - a unit of geological time that is a subdivision of a period and is itself divided into ages
References in classic literature ?
The water was quite free from reptiles, and the vegetation upon the banks of the river had altered to more open and parklike forest, with eucalyptus and acacia mingled with a scattering of tree ferns, as though two distinct periods of geologic time had overlapped and merged.
Dr Mahmood said that a timetable could not be predicted as the timeframe for such phenomenon were calculated in geologic time period called the Holocene.
The notion of geologic time, where, in an outburst of unintended poesy, Newhall said 10 thousand years can be just like yesterday.
McPhee wrote about Alaska and the value of wilderness in Coming into the Country, compared hydraulic mining's swift destruction with the crawl of geologic time in Assembling California, and perfected a prose style that makes subjects as ordinary as oranges and lacrosse sublime.
Modern horseshoe crabs are often considered living fossils due to having shown little apparent change in physical appearance over a vast period of geologic time.
Modern horseshoe crabs are often considered 'living fossils' due to having shown little apparent change in physical appearance over a vast period of geologic time.
She explores the interspecies relationship between humans and horseshoe crabs, and how they are meaningful to one another in specific ways as humans interpret them for understanding geologic time, use them for biomedical applications, collect them for agricultural fertilizer, eat them, and capture them as bait, and crabs make humans matter by revealing humansAE vulnerability to endotoxins and fertilizing soil for human food.
The idea of amending geologic time carries the same weight as eliminating an amendment to the U.
The advent of using radioactivity as a clock for elapsed geologic time gave the scientific community one of its true pioneers and enduring stars, Arthur Holmes.
Scope: Sedimentary Geology and Paleobiology supports studies of: (1) the changing aspects of life, ecology, environments, and biogeography in geologic time based on fossilorganisms; (2) all aspects of the Earth's sedimentary lithosphere its insights into the geological processes and rich organic and inorganic resources locked in rock sequences; (3) the science of dating and measuring the sequence of events and rates of geological processes as manifested in Earth's past sedimentary and biological (fossil) record; (4) the geologic record of the production, transportation, and deposition of modern and ancient physical and chemical sediments; and (5) understanding Earth's deep-time (pre-Holocene) climate systems
It would be like trying to think on geologic time scales--in epochs and periods rather than in years and centuries, say.
Geologic Time Scale Era Period Major Events Cenozonic Neogene First humans appear.