Foraminifera


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Fo·ram·i·nif·e·ra

(fō-ram'i-nif'ĕr-ă, for'ă-mi-nif'er-ă),
A subclass of Rhizopoda possessing anastomosing pseudopodia; these form a network around the cell that usually develops into a complex calcareous shell; an important component of the ocean bottom and of rockbeds overlying oil deposits.
[L. foramen, aperture, + fero, to carry]

Foraminifera

amoeboid PROTOZOANS that possess chitinous, calcareous or siliceous shells that are usually many-chambered. Calcareous Foraminifera are the main constituent of chalk.
References in periodicals archive ?
For the French and Swiss team of researchers, rather than showing a gradual decline in ocean temperatures over the past 100 million years, these measurements simply reflect the change in oxygen-18 content in the fossil foraminifera tests.
In general, the main objectives of this study are: 1-Determining relative age of these deposits using foraminifera and calcareous alga (carbonate part) as well as their stratigraphic position (evaporite and silici-clastic parts) 2-Identifying and analyzing facies and also checking vertical and horizontal changes of facies 3-Interpreting depositional paleo environment and offering depositional model 4-Identifying depositional sequences and sequence boundaries by using fossils and other data and comparing sea level fluctuation at the time of deposition with global eustatic curve of Haq et al.
Biogenic calcite grains are well-survived foraminifera tests, empty or filled with calcite micrite (here, as elsewhere, the black filling of foraminifera chambers is glue for cementing an analyte), and rare thin chips of foraminifera shells.
In the Uztarrotz outcrop, an exposure in the lower part of this unit, the microassemblages are dominated by foraminifera which are associated whit common gastropods, serpulids, echinoid spines and smooth-valved ostracods.
The aim of present investigation is to substantiate the occurrence of some age diagnostic larger benthic foraminifera already recorded from the Salt Range, Pakistan.
This section is highly fossiliferous and mainly composed of foraminifera.
Traditionally, the foraminifera are divided into 8-12 orders (Loeblich and Tappan, 1988), which have been recently placed into 3 or 4 major classes (Pawlowski et al.
The results of present study are purely based on the cluster analyses of the morphological features of planktic species Globigerina bulloides on the assumption that each morphospecies of planktonic Foraminifera represents a genetically continuous species with a unique habitat.
In his study, MacLeod analyzed the fossilized shells of 90 million-year-old planktic and benthic foraminifera, single-celled organisms about the size of a grain of salt.