geologic time


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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]
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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.
The difference, according to Stein, is that the two sides of the San Andreas fault move past each other at a speed of about one and a half inches in a year - which is fast on a geologic time scale.
There are very few places in the world where there is a window on that slice of geologic time," says Andre R.
subsurface modeling solution with a powerful new Interpretation-Modeling workflow that incorporates automatic intra-formation seismic interpretation with true 3D modeling in geologic time and space.
With exhibits examining the dawn of geologic time, the Native American experience, the colonial and revolutionary eras, a pivotal Civil War battleground and the commonwealth's vast industrial age, The State Museum demonstrates that Pennsylvania's story is America's story.
Consequently, cores from Lake E reach back in geologic time nearly 30 times farther than Greenland ice cores covering the past 110,000 years.
Rates of offshore sediment accumulation have varied significantly over geologic time, says Bruce H.
The circum-Hellas highlands represent a significant percentage of the southern hemisphere of Mars and have served as a locus for volcanic and sedimentary activity throughout Martian geologic time.
It's precision gets better as you go up in altitude," says Dana Royer of Pennsylvania State University in State College, who studies variations in the concentration of carbon dioxide over geologic time.
Current scientific thinking suggests that these supervolcanoes were caused by eruptions occurring over a period of a few million years or less - a rapid pace in geologic time.
Although recent studies hadn't identified a specific cause, they suggested the deaths occurred suddenly on the geologic time scale--possibly in as little as 8,000 years (SN: 7/15/00, p.
After walking these distances visitors express a visceral understanding of geologic time saying, "It's a long time, the Earth is really old