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The study of the spatial and temporal distribution of fossil organisms, often interpolated with radiometric, geochemical, and paleoenvironmental information as a means of dating rock strata.


the examination of the ages of rock strata by using fossils


(ˌbaɪ oʊ strəˈtɪg rə fi)

a branch of geology dealing with the differentiation of sedimentary rock.
bi`o•strat`i•graph′ic (-ˌstræt ɪˈgræf ɪk) adj.
References in periodicals archive ?
Among these benthicand planktonic for aminifera are the most diverse, biostratigraphically important and comparatively well studied (Jones, 1961; Afzal, 1996; Warraich et al., 2000).
The boundary between the Rakvere and Nabala RSs is biostratigraphically easy to recognize by the presence of the chitinozoan zonal species Armoricochitina reticulifera (Grahn) in the lowermost Montu or Paekna Fms (Mannil & Meidla 1994; Nolvak et al.
The limestones sampled from the studied exposures of the Fila de Cal Formation show a total of eight different microfacies types (MF1 to 8, Tables 1 and 2) and three biostratigraphically successive larger foraminiferal assemblages.
To date no biostratigraphically useful fossils have been found in the Dighton Conglomerate and its age is inferred from its stratigraphic relationship with the Rhode Island Formation.
Within these facies, at 15 meters from the base of the succession, appears Gevanites (Curionii Zone, Brack et al., 2003; Brack et al., 2005), which serves to date biostratigraphically this level.
Some of these sites reflect a Rancholabrean age based on presence of Bison, while others cannot be biostratigraphically assigned.
The age of the Woodbine Formation was established biostratigraphically by Kennedy and Cobban (1990) using ammonites from marine members in the lower part of the formation.
From these diverse assemblages, nine species are of great importance, either biostratigraphically or biogeographically, or are rare Great Plains taxa.
Most are biostratigraphically based, but other criteria have been used, such as the iridium spike at the base Cenozoic, the carbon isotope anomaly at the base of the Eocene, and a specific Milankovitch cycle at the base of the Pleistocene.
Regardless of the small thickness of the Leetse Formation in the Saka section, its sequence is biostratigraphically the most complete on the North Estonian Klint.