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Topic: Era (geology)

  AllRefer.com - Paleozoic era (Geology And Oceanography) - Encyclopedia
During the hiatus between the late Precambrian and Paleozoic eras most of the evidence of the earth's early history was destroyed by erosion.
In North America, the era began with submerged geosynclines, or downward thrusts of the earth's crust, along the eastern, southeastern, and western sides of the continent, while the interior was dry land.
During the early part of the era, the area of exposed Precambrian, or shield, rocks in central Canada were eroding, supplying sediment to the geosynclines from the interior.
reference.allrefer.com /encyclopedia/P/Paleozoi.html   (516 words)

Era is also popularly used to denote the passing of shorter periods, such as the Big Band era, Disco era.
In a calendar, the era is the date from which years in the calendar are counted.
Japanese eras began with the ascension of an emperor.
www.ebroadcast.com.au /lookup/encyclopedia/er/Era.html   (457 words)

 AllRefer.com - Mesozoic era (Geology And Oceanography) - Encyclopedia
Great crustal disturbances that marked the close of the Paleozoic and the beginning of the Mesozoic eras brought about drastic changes in the topography of North America.
The Appalachian geosyncline, or downward thrust of the earth's crust, was replaced by the Appalachian Mts., and the eastern part of the continent was elevated during most of the era.
Mammals probably evolved from some common ancestor of the reptiles early in the Triassic Period, but were subordinate to the reptiles until the end of the era, when the dominance of reptiles was ended by the extinction of the dinosaurs.
reference.allrefer.com /encyclopedia/M/Mesozoic.html   (426 words)

 DRAM, FGS, Florida Geology Glossary
Cenozoic Era - the latest of the four eras into which geologic time, as recorded by the stratified rocks of the Earth's crust, is divided; it extends from the end of the Mesozoic Era to and including the present, or Recent.
geology - the study of the planet Earth, the materials of which it is made, processes that affect these materials, the changes that the Earth has undergone in the past and the changes it is currently undergoing.
A period is a subdivision of an era.
www.dep.state.fl.us /geology/geologictopics/glossary.htm   (2272 words)

 era - HighBeam Encyclopedia
In geology, it is the name applied to large divisions of geological process, e.g., Paleozoic era (see geology).
Since in different calendars years are of different lengths and do not begin on the same day (see calendar), several factors have to be used in changing the year of one era to that of another, and even with conversion charts there are still difficulties.
Therefore the actual birth of Jesus must be dated a little earlier, probably in 4 BC The term epoch is often confused with era in writing.
www.encyclopedia.com /doc/1E1-era.html   (430 words)

The discipline of geology deals with the history of the earth, including the history of life, and covers all physical processes at work on the surface and in the crust of the earth.
Oil and coal geologists must employ structural geology in their daily work, especially in petroleum exploration, where the detection of structural traps that can hold petroleum is an important source of information to the geologists.
This major branch of geology is geared to the analysis, exploration, and exploitation of geological materials of use to humans, such as fuels, metals and nonmetallic minerals, water, and geothermal energy.
members.tripod.com /Geologi/geology_ms.htm   (4968 words)

 Cenozoic Era - Search Results - MSN Encarta   (Site not responding. Last check: 2007-10-10)
Cenozoic Era, third and final era of the Phanerozoic Eon, extending from 65 million years ago to the present day.
In geology an era is the longest major division of time, subdivided into periods and epochs.
Miocene Epoch, epoch of the Cenozoic Era of the geological timescale, and also the series of rocks formed during this time which lasted between about...
uk.encarta.msn.com /Cenozoic_Era.html   (128 words)

 USGS Paleontology - Glossary of Terms
The branch of geology concerned with the separation and differentiation of rock units by means of the study of the fossils they contain.
An era of geologic time from the beginning of the Tertiary period (65 million years ago) to the present.
An era of geologic time, from the end of the Precambrian to the beginning of the Mesozoic, spanning the time between 544 and 248 million years ago.
geology.er.usgs.gov /paleo/glossary.shtml   (2395 words)

 USGS Geology in the Parks
The birth of the Appalachian ranges, some 480 million years ago, marks the first of several mountain building plate collisions that culminated in the construction of the supercontinent Pangea with the Appalachians near the center.
During the earliest Paleozoic Era, the continent that would later become North America straddled the equator.
It was not until the region was uplifted during the Cenozoic Era that the distinctive topography of the present formed.
geology.wr.usgs.gov /parks/province/appalach.html   (750 words)

 Precambrian Era   (Site not responding. Last check: 2007-10-10)
The Precambrian was originally defined as the era that predated the emergence of life in the Cambrian Period.
This era began with the formation of the earth from dust and gas orbiting the Sun about 4.6 billion years ago.
In fact, geologists date the beginning of the Proterozoic Era by the age of the oldest continental rocks that have not been reheated or chemically altered.
www.geo.msu.edu /geo333/Precambrian.html   (2441 words)

Perhaps of greatest interest to other Darwin scholars and to biologists, she analyzes with care the ways in which his geology generated the problems to which his eventual theory of the origin of new species was designed to be the solution.
The result is a fresh view of the beginnings and growth of the new science of geology in the first half of the nineteenth century as well as a fresh view of Darwin’s personal growth as a participant researcher and theorist.
That geology, she argues, formed both the framework and central impetus for the biological ideas that emerged, really as part of a continuous intellectual development.
www.cornellpress.cornell.edu /cup_detail.taf?ti_id=4296   (1822 words)

 Beach Nourishment - Coastal Geology
Coastal processes interact with the local coastal geology and sediment supply to form and modify a coastline's physical features – barrier islands, beaches, dunes, bluffs, and upland areas.
To understand the nature of barrier islands and their beaches, it is important for the decision-maker to have a general knowledge of the geology of the areas forming these environments.
A different aspect of the geology of the coastal regions is found in the Florida peninsula.
www.csc.noaa.gov /beachnourishment/html/geo/index.htm   (2033 words)

 Geology of the South Snake Range and Great Basin National Park
Layers of sand, mud, and ooze are being buried and turned to rock beneath the seas all over the world today, just as they were in this region 500 million years ago.
The rocks in the park were further changed during a mountain-building event that occurred around 200 million years ago during the Mesozoic Era.
The end of the Cenozoic Era witnessed more granitic intrusions into the park, as well as colder climates that further shaped the landscape.
www.nps.gov /grba/parkgeology.htm   (927 words)

 Home - Paleoproterozoic Mineralization Research   (Site not responding. Last check: 2007-10-10)
The Paleoproterozoic represents one of the richest mineralized eras in geological history.
The era hosts orders of magnitude by far the largest concentrations of iron, manganese, platinum and chromium in the world, in addition to very large concentrations of gold, base metals, fluorspar, graphite, etc..
Characterization of the composition of time-bounded ores in the Paleoproterozoic is an important component of the applied economic geology part of the project in order to try and ensure cost-effective extraction and beneficiation of the deposits.
general.uj.ac.za /geology/ppm   (338 words)

 Tallgrass Prairie National Preserve - Geology, page 1
The world's geology has been and is still created in many different ways.
Climate affects geology in many ways by freezing, thawing, eroding, and depositing landscapes by way of wind and precipitation.
The geologic time period represented in the Flint Hills is referred to as the Permian Period of the Paleozoic Era, which was approximately 250-290 million years ago.
www.nps.gov /tapr/Geology.htm   (797 words)

 era - Search Results - MSN Encarta
Equal Rights Amendment (ERA), proposed amendment to the Constitution of the United States to provide for the equality of sexes under the law.
Era, term used in physical science and history.
Mesozoic Era : pictures related to the Mesozoic Era
ca.encarta.msn.com /era.html   (135 words)

 Geology Dictionary - Definition of Term Paleozoic Era
Home » Geology Dictionary - P » Paleozoic Era
Definition : The earliest era of the Phanerozoic Eon, marked by the presence of marine invertebrates, fish, amphibians, insects, and land plants.
A planet (from the Greek planete means "wanderer" or more forcefully "vagrant, tramp") is an object in orbit around a star that is not a star in its own right.
www.alcwin.org /Dictionary_Of_Geology_Description-156-P.htm   (406 words)

 Palaeos Timescale: Detailed Geological Timescale
The Geological Time-Scale is hierarchical, consisting of (from smallest to largest units) ages, epochs, periods, eras and eons.
Each era, lasting many tens or hundreds of millions of years, is characterized by completely different conditions and unique ecosystems.
Each of the eons, eras, periods, and ages are, or will be, described in more detail on their respective pages.
www.palaeos.com /Timescale/timescale.html   (636 words)

 WVGES Geology: Historical Geology Summary
During the early part of the era, considerable igneous activity took place in neighboring states to the east, and a few dikes of diabase and other basic rock extended into Pendleton and surrounding counties.
In the Cenozoic Era, which extended from 65 million years ago to present day, igneous activity was renewed in the eastern part of the State.
Late in the Cenozoic Era, in fact extending to less than 100,000 years ago, glaciers covered the northern part of the North American continent, extending almost to the Northern Panhandle of West Virginia, but not into the State.
www.wvgs.wvnet.edu /www/geology/geolhist.htm   (1017 words)

 The Atomic Constants, Light And Time - Supplement
The atomic dates of geology and astronomy are of considerable importance when compared with the dynamical dates in the Bible.
The Mesozoic or 'middle life' Era which followed was closed by the second catastrophe which led the way to the Cenozoic or so-called recent life Era.
Finally there is the CENOZOIC or recent-life era from Peleg to the present ranging in age atomically from 70 million years down to zero.
www.ldolphin.org /setterfield/supplement.html   (6267 words)

 The geology and ancient history of Abercraf, Wales,UK.   (Site not responding. Last check: 2007-10-10)
Today its geology is still a major economic influence only now it is tourists who are supporting the local economy.
The Era ended with the Permian Period which saw great upheavals in the earth's crust and mass extinctions of many life forms.
The Geology of the Swansea Valley web-site is produced by Cefn-yr-Erw Field Study Centre and Primate Sanctuary, Caehopkin, Abercrave, Swansea SA9 1UD.
www.wales-hotel.co.uk /geology   (758 words)

 Mineral Occurences of Madagascar (1:500,000 scale), Geology, Fossils
Madagascar Geology map was digitized from the Madagascar Geological Services' Geological map compiled in the late 1960's and 1970's by Henri Bessairie.
The 1:500,000 Geology package consists of geology polygons, zones of mineralization and crystallization, and linear features such as faults, trends, mineralized veins, etc.
The 1:500,000 scale geology has a more complicated database structure than our 1:1,000,000 scale product because of the complexity of the map legends on the 8 map sheets.
www.gospatial.com /html/minerals_500K.php   (567 words)

 Geology History Provence, Cenozoic Era, The Ages, Hallstatt Culture, La Tene France - Provence Beyond
The Cenozoic Era, beginning around 65 million years ago and extending through the present, is the shortest and the last of the five major eras of geologic time.
This is the period during which the today's world of geographical features, flora and fauna came into being.
This was the era of Cro-Magnon man in France, and the source of wall paintings.
www.beyond.fr /history/geology.html   (602 words)

 Mesozoic Geology
Detailed geology of the rocks the Channel Tunnel was excavated in.
Geology of Kent and the Boulonnais *** (9)
Texas, Austin area, Travis County, geology history, rock types and formations, faulting and a Cretaceous volcano.
www.geologyshop.co.uk /mesoz~1.htm   (284 words)

 Activity, Curriculum, and Technology Lesson Plan
Assign each group one of the geological eras to research and develop a timeline (Cenozoic including Quaternary and Tertiary periods, Mesozoic including Cretaceous, Jurassic and Triassic periods, Paleozoic including Permian, Pennsylvanian and Mississippian periods, Paleozoic including Devonian, Silurian, Ordovician and Cambrian periods, and the Precambrian era).
Depending on the students' ability level, the information can either be directly transferred from the website to the timeline (copy and paste method) or students may take notes from the websites and then input the information into the timeline.
The second column on the right hand side is reserved for the students to insert information regarding the geology and climate during their time period/era.
its.guilford.k12.nc.us /act/grade8/act8.asp?ID=842   (1017 words)

 Fourth Grade - Science - Lesson 19 - Geology
Be sure to give the Precambrian Era group the lion's share of the yarn, string or paper because their timeline represents 80% of geologic time, 33.5 feet.
When the groups have completed timelines for their eras, have the groups come together, arrange the eras in the proper order and tie them together to make one long timeline around the room representing all of geologic time.
Tell them that the next geologic era, the Cenozoic which began 65 million years ago and continues into the present, is often called the Age of Mammals.
www.cstone.net /~bcp/4/4DSci.htm   (6774 words)

 Navigating the Geology Wing
The Geology Wing is quite large, and continually growing.
Information in the Geology Wing is organized so that you can explore either the stratigraphy, ancient life, field localities or tectonics associated with each period of time.
This chart from the Cenozoic page is an example of an Era chart, which will allow you to explore the periods and epochs into which the era is subdivided.
www.ucmp.berkeley.edu /help/navgeology.html   (794 words)

 Geology, Earth science, geoscience
Geology wing start in the Cenozoic Era (65 million years ago to the present) and work back through time, or start with Hadean time (4.5 to 3.8 billion years ago) and journey forward to the present day, fossil localities, tectonics of the various time periods, click here for Geological time machine
Historical geology historical geology is the study of changes to Earth and life in time and space
Physical geology geology is the science that studies the Earth, how it was born, how it evolved, how it works
www.educypedia.be /education/geology.htm   (606 words)

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