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Encyclopedia > Stratum
Goldenville Strata exposed at a quarry in Bedford, Canada. It is made up of thick layers of ocean sediments that were laid down during the Middle Cambrian period and were subsequently pushed up onto land. This formation now covers over half of the province of Nova Scotia and is recorded as being 29,000 feet in thickness in some areas.
Interstate road cut through limestone and shale strata in East Tennessee
Rock strata at Depot Beach, New South Wales
Rock strata at Depot Beach, New South Wales


In geology and related fields, a stratum (plural: strata) is a layer of rock or soil with internally consistent characteristics that distinguishes it from contiguous layers. Each layer is generally one of a number of parallel layers that lie one upon another, laid down by natural forces. They may extend over hundreds of thousands of square kilometers of the Earth's surface. Strata are typically seen as bands of different colored or differently structured material exposed in cliffs, road cuts, quarries, and river banks. Individual bands may vary in thickness from a few millimeters to a kilometer or more. Each band represents a specific mode of deposition -- river silt, beach sand, coal swamp, sand dune, lava bed, etc. Strata is a comic science fiction novel by Terry Pratchett. ... Strata Title is a form of ownership devised for multi-level apartment blocks, which have apartments at different levels or strata. Strata title was first introduced in New South Wales, Australia to better cope with apartment blocks. ... Image File history File linksMetadata Download high resolution version (2048x1536, 1085 KB) Description Goldenville Strata exposed at a local quarry. ... Image File history File linksMetadata Download high resolution version (2048x1536, 1085 KB) Description Goldenville Strata exposed at a local quarry. ... Bedford (2001 pop. ... The Middle Cambrian is an geological epoch that is part of the Cambrian Era. ... Motto: Munit Haec et Altera Vincit(Latin) One defends and the other conquers Capital Halifax Largest city Halifax Regional Municipality Official languages English Government - Lieutenant-Governor Mayann E. Francis - Premier Rodney MacDonald (PC) Federal representation in Canadian Parliament - House seats 11 - Senate seats 10 Confederation July 1, 1867 (1st) Area... Rock strata, Tennesee Image copyleft: Image taken by me, released under GFDL Pollinator 03:36, Nov 9, 2004 (UTC) ( ) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Rock strata, Tennesee Image copyleft: Image taken by me, released under GFDL Pollinator 03:36, Nov 9, 2004 (UTC) ( ) File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Limey shale overlaid by limestone. ... For other uses, see Shale (disambiguation). ... Official language(s) English Capital Nashville Largest city Memphis Largest metro area Nashville Area  Ranked 36th  - Total 42,169 sq mi (109,247 km²)  - Width 120 miles (195 km)  - Length 440 miles (710 km)  - % water 2. ... Image File history File linksMetadata Rock_Strata. ... Image File history File linksMetadata Rock_Strata. ... Capital Sydney Government Constitutional monarchy Governor Professor Marie Bashir Premier Morris Iemma (ALP) Federal representation  - House seats 50  - Senate seats 12 Gross State Product (2004-05)  - Product ($m)  $305,437 (1st)  - Product per capita  $45,153/person (4th) Population (End of March 2006)  - Population  6,817,100 (1st)  - Density  8. ... This article includes a list of works cited but its sources remain unclear because it lacks in-text citations. ... The rocky side of a mountain creek near Orosí, Costa Rica. ... Loess field in Germany Surface-water-gley developed in glacial till, Northern Ireland Soil comprising the pedosphere is positioned at the interface of the lithosphere and biosphere with the atmosphere and hydrosphere. ... To help compare orders of magnitude of different geographical regions, we list here surface areas between 100,000 km² and 1,000,000 km². See also areas of other orders of magnitude. ... Adjectives: Terrestrial, Terran, Telluric, Tellurian, Earthly Atmosphere Surface pressure: 101. ... “Precipice” redirects here. ... This article or section does not adequately cite its references or sources. ... A small cinder quarry A dimension stone quarry A quarry is a type of open-pit mine from which rock or minerals are extracted. ... This bridge across the Danube River links Hungary with Slovakia. ... A millimetre (American spelling: millimeter), symbol mm is an SI unit of length that is equal to one thousandth of a metre. ... A kilometer (Commonwealth spelling: kilometre), symbol: km is a unit of length in the metric system equal to 1,000 metres (from the Greek words χίλια (khilia) = thousand and μέτρο (metro) = count/measure). ... Deposition is a word used in many fields to describe different processes: In law, deposition is the taking of testimony outside of court. ... Silt is soil or rock derived granular material of a specific grain size. ... Patterns in the sand Sand is a granular material made up of fine rock particles. ... This article or section does not adequately cite its references or sources. ... This article is about the sand formations, for other meanings see Dune (disambiguation) Mesquite Flat Dunes in Death Valley National Park In physical geography, a dune is a hill of sand built by eolian (wind-related) processes. ... Look up lava, Aa, pahoehoe in Wiktionary, the free dictionary. ...


Geologists study rock strata and categorize them by the material in the beds. Each distinct layer is usually assigned a "formation" name usually based on a town, river, mountain, or region where the formation is exposed and available for study. For example, the Burgess Shale is a thick exposure of dark, occasionally fossiliferous, shale exposed high in the Canadian Rockies near Burgess Pass. Slight distinctions in material in a formation may be described as "members" or sometimes "beds." Formations are collected into "groups." Groups may be collected into "supergroups." the are cool The Geologist by Carl Spitzweg A geologist is a contributor to the science of geology, studying the physical structure and processes of the Earth and planets of the solar system (see planetary geology). ... A geologic formation is a formally named rock stratum or geological unit. ... Hallucigenia sparsa, one of the organisms unique to the Burgess Shale. ... Three small ammonite fossils, each approximately 1. ... For other uses, see Shale (disambiguation). ... Ringrose Peak, Lake OHara, British Columbia, Canada The Canadian Rockies comprise the Canadian segment of the North American Rocky Mountains range. ...


The stratum is the fundamental unit in a stratigraphic column and forms the basis of the study of stratigraphy. Stratigraphy, a branch of geology, studies rock layers and layering (stratification). ...


See also

Stratification gooberini went to lousville to dance on a praire and then he went down the hill to hang out with jarry. ... // Foundations Principles of Geology Author: Charles Lyell Publication data: 1830–1833. ... Archaeology, archeology, or archæology (from Greek: αρχαίος, archae, ancient; and λόγος, logos, knowledge) is the study of human cultures through the recovery, documentation and analysis of material remains and environmental data, including architecture, artifacts, biofacts, human remains, and landscapes. ... A geologic map is a special-purpose map made for the purpose of showing subsurface geological features. ... A volume of rock or ice of identifiable origin and age range that is defined by the distinctive and dominant, easily mapped and recognizable petrographic, lithologic or paleontologic features (facies) that characterize it. ... A geologic formation is a formally named rock stratum or geological unit. ... In Archaeology, the term horizon is used in more than one way; the less rigourously defined ones being more likely to be met in conversation rather than in a professional report. ...

External link

  • GeoWhen Database

  Results from FactBites:
 
Pacific Southwest Research Station (967 words)
STRATUM is a new street tree management and analysis tool for urban forest managers that uses tree inventory data to quantify the dollar value of annual environmental and aesthetic benefits: energy conservation, air quality improvement, CO2 reduction, stormwater control, and property value increase.
STRATUM was developed for urban foresters, arborists, non-profit tree organizations, landscape architects and contractors, planners, environmental consultants, and anyone else with a vested interest in their community's urban forest.
STRATUM software is currently being produced as a stand-alone application with a targeted release date of Spring 2005.
FAQ: Stratum with only one PSU detected (633 words)
Having a stratum with a single PSU is a fairly common problem.
The second solution is to treat the data from that stratum as though it is from another stratum.
Stratum with a singleton PSU can also arise during estimation if the estimator itself drops observations from the estimation sample.
  More results at FactBites »

 
 

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