overall formations, geologic structures and local strata, calibrated by those layers which are widespread, a nearly complete geologic record has been constructed...

The geologic temperature record are changes in Earth's environment as determined from geologic evidence on multi-million to billion (109) year time scales...

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...

deposition of all rocks within a geological region, and then to every region, and by extension to provide an entire geologic record of the Earth. A gap or missing...

golden spikes on geologic timescales represent internationally agreed upon references for the boundaries of the stages in the geologic timescale. These...

or Early Carboniferous, is a subperiod in the geologic timescale or a subsystem of the geologic record. It is the earlier of two subperiods of the Carboniferous...

often known as Quaternary geology, after the Quaternary period of geologic history, which is the most recent period of geologic time. Magma is the original...

layer, but the term is used to describe any break in the sedimentary geologic record. The significance of angular unconformity (see below) was shown by...

The geological history of Earth follows the major geological events in Earth's past based on the geologic time scale, a system of chronological measurement...

"A Geologic Valentine: Episode #1". The Geologic Podcast. Archived from the original on September 26, 2011. Retrieved September 30, 2012. "Geologic Podcast:...

frontage into just three enormous fans. Alluvial fans are common in the geologic record, but may have been particularly important before the evolution of land...

within the geologic record. Tephra is any sized or composition pyroclastic material produced by an explosive volcanic eruption and precise geological definitions...

areas of limited sand availability, they are poorly preserved in the geologic record. Where sand is more abundant, transverse dunes take the form of aklé...

extinct desert. There are at least 14 known unconformities in the geologic record found in the Grand Canyon. Uplift of the region started about 75 million...

surrounding rock did, or a rock that survived a destructive geologic process. Some geologic processes are destructive or transformative of structures or...

affect the geology of the Earth comes from the Earth. The third rule is that celestial cycles do not impact the patterns of Earth's geologic record. Rule two...

monsoon circulation was first proposed in 1973. The evaporites in the geologic record suggest vast and extensive regions of persistent dry conditions near...

years, or megaanni (Ma). The geologic record is the strata (layers) of rock in the planet's crust and the science of geology is much concerned with the...

the first appearance of a species in the geologic record. FADs are determined by identifying the geologically oldest fossil discovered, to date, of a particular...

reconstruct the geological history of Earth. Historical geology examines the vastness of geologic time, measured in billions of years, and investigates...

(2008). The Concise Geologic Time Scale. Cambridge University Press. p. 184. ISBN 978-0-521-89849-2. U.S. Geological Survey Geologic Names Committee (March...

Alluvial fans likely contain the largest accumulations of gravel in the geologic record. These include conglomerates of the Triassic basins of eastern North...

Pangaea is the most recent supercontinent reconstructed from the geologic record and therefore is by far the best understood. The formation of supercontinents...

fans and likely contain the largest accumulations of gravel in the geologic record. Breccias are similar to conglomerates, but have clasts that have angular...

originated this way, possibly via parallel concepts in geology (geologic record) or palaeontology (fossil record). The term was used regularly by V. Gordon Childe...

sub-discipline of geology, a Global Standard Stratigraphic Age, abbreviated GSSA, is a chronological reference point and criterion in the geologic record used to...

exposed geology of the Death Valley area presents a diverse and complex set of at least 23 formations of sedimentary units, two major gaps in the geologic record...

(/ɔːrdəˈvɪʃi.ən, -doʊ-, -ˈvɪʃən/ or-də-VISH-ee-ən, -⁠doh-, -⁠VISH-ən) is a geologic period and system, the second of six periods of the Paleozoic Era, and...

chemical by-products in the geologic record. These attributes are susceptible to be modified or obliterated over geologic time, making it more difficult...

from the original on 7 June 2014. Retrieved 6 June 2014. Geologic Province Map of the World (NASA) Definitions for the Geologic Provinces (USGS) v t e...