biostratigraphic
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biostratigraphic — adjective see biostratigraphy … New Collegiate Dictionary
biostratigraphic — bio·stratigraphic … English syllables
biostratigraphic — … Useful english dictionary
biostratigraphic unit — noun : a group of geologic strata characterized by a particular fossil fauna or flora rather than by lithologic features … Useful english dictionary
Biozone — Biostratigraphic units 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… … Wikipedia
biostratigraphy — biostratigraphic /buy oh strat i graf ik/, adj. /buy oh streuh tig reuh fee/, n. a branch of geology dealing with the differentiation of sedimentary rock units on the basis of the fossils they contain. [BIO + STRATIGRAPHY] * * * … Universalium
Geological unit — A geological unit is 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.… … Wikipedia
Cambrian Period — Oldest time division of the Paleozoic Era. During the Cambrian, 543–490 million years ago, there were widespread seas and several scattered landmasses. The largest continent was Gondwana. The average climate was probably warmer than today, with… … Universalium
Biostratigraphy — is the branch of stratigraphy which focuses on correlating and assigning relative ages of rock strata by using the fossil assemblages contained within them. Usually the aim is correlation, demonstrating that a particular horizon in one geological … Wikipedia
Relative dating — Before the advent of absolute dating in the 20th century, archaeologists and geologists were largely limited to the use of relative dating techniques. It estimates the order of prehistoric and geological events were determined by using basic… … Wikipedia
