Biozone






Biozones types. Each rectangle represents bodies of sedimentary rocks and each line a different taxon. The arrows indicate the taxon first or last appearance.


Biostratigraphic unit or biozones are intervals of geological strata that are defined on the basis of their characteristic fossil taxa.


A biostratigraphic unit may be defined on the basis of a single taxon or combinations of taxa, on relative abundances of taxa, or variations in features related to the distribution of fossils. The same strata may be zoned differently depending on the diagnostic criteria or fossil group chosen, so there may be several, sometimes overlapping, biostratigraphic units in the same interval.


The length of time represented by a biostratigraphic zone is called a biochron. The International Commission on Stratigraphy defines the following types of Biozones:[1]




  • Range zones, subdivided into taxon-range zones and concurrent-range zones

  • Interval zones

  • Lineage zones

  • Assemblage Zones

  • Abundance zones



See also



  • Biochronology

  • Ecozone

  • Teilzone

  • Acme zone



References




  1. ^ "Biostratigraphic Units". International Commission on Stratigraphy. Retrieved 11 May 2018..mw-parser-output cite.citation{font-style:inherit}.mw-parser-output q{quotes:"""""""'""'"}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-limited a,.mw-parser-output .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}








-

Popular posts from this blog

Westermarck effect

Image
This article includes a list of references, but its sources remain unclear because it has insufficient inline citations . Please help to improve this article by introducing more precise citations. (November 2014) (Learn how and when to remove this template message) The Westermarck effect , or reverse sexual imprinting, is a hypothetical psychological effect through which people who live in close domestic proximity during the first few years of their lives become desensitized to sexual attraction. This phenomenon was first hypothesized by Finnish anthropologist Edvard Westermarck in his book The History of Human Marriage (1891) as one explanation for the incest taboo. Observations interpreted as evidence for the Westermarck effect have since been made in many places and cultures, including in the Israeli kibbutz system, and the Chinese Shim-pua marriage customs, as well as in biologically-related families. In the case of the Israeli kibbutzim (collective farms), children...
Read more

Orthodox Church in America

Image
For other uses, see Orthodox Church in America (disambiguation). Orthodox Church in America Recognition Autocephaly recognized by the Russian (since 1970), Bulgarian, Georgian, Polish, and Czech and Slovak Churches [1] Primate Metropolitan Tikhon (Mollard) [2] Headquarters Oyster Bay Cove, New York, United States Territory United States, Canada Possessions Mexico, formerly Australia and South America Language English, Church Slavonic, Spanish, Russian, Arabic, Koine Greek, Romanian, Bulgarian, Albanian Members 1 million adherents, [3] 90,000 (U.S. only) [a] [5] Bishops 14 [5] Parishes 700 [5] Monasteries 20 [5] Website oca.org Part of a series on the Eastern Orthodox Church Mosaic of Christ Pantocrator, Hagia Sophia Overview Structure Theology (History of theology) Liturgy Church history Holy Mysteries View of salvation View of Mary View of icons Background Crucifixion / Resurrection / Asc...
Read more

Italian cuisine

Image
"Italian restaurant" redirects here. For the television series, see Italian Restaurant. Some typical Italian gastronomic products in a window display in Imola Pizza is one of the world's most popular foods and a common fast food item Part of a series on the Culture of Italy History People Languages Traditions Mythology and folklore Mythology folklore Cuisine Festivals Religion Art Literature Music and performing arts Music Media Television Cinema Sport Monuments World Heritage Sites Symbols Flag Coat of arms Italy portal v t e Italian cuisine History Ancient Roman cuisine Medieval cuisine Early modern cuisine Contemporary cuisine Regional cuisines Apulian cuisine Lombard cuisine Neapolitan cuisine Roman cuisine Sicilian cuisine Venetian cuisine Cuisine of Abruzzo Cuisine of Sardinia Lists Chefs Dishes Pas...
Read more