foraminifer การใช้

• It has been dated by means of planktonic foraminifers and magnetostratigraphy.
• Evidence of subpolar foraminifers ( Turborotalita quinqueloba ) indicate open water conditions in that area.
• Gastropods, thin-shelled and thick-shelled ostracods and some rare aggloutinated foraminifers are present in this facies.
• It is very important because the readily recognized iridium anomaly and primitive Danian planktonic foraminifers define the base of the Danian.
• Foraminifers are sensitive to changes in their environment such as temperature and salinity, which makes them useful indicators ( proxies ) of past climate changes.
• It was originally described as " Palmula ", but the name was occupied by a genus of Cretaceous foraminifer first described in 1833.
• Trilobite skeletal fragments, for example, are a characteristic of early Paleozoic rock units but are not found in Cenozoic rocks, which is dominated by foraminifers.
• Some of the foraminifers are characteristic of lower bathyal depths, indicating that some of the Juncal formation was deposited at a depth of up to 2, 000 meters.
• Sir William Dawson's name is especially associated with " Eozoon canadense ", which in 1865 he described as an organism having the structure of a foraminifer.
• Above the Gelasian as the first occurrences of the calcareous nannofossil " Gephyrocapsa sp . " and the extinction level of the planktonic foraminifer " Globigerinoides extremus ".
• Above the boundary are the lowest occurrence of calcareous nannofossil medium " Gephyrocapsa spp . " and the extinction level of the planktonic foraminifer " Globigerinoides extremus ".
• A common type of biological particles is foraminifers, single-celled, amoeba-like protists that have a shell and either live on the sea bottom or float in the upper water column.
• The word " foraminifera " is the Latin plural of the singular noun " foraminifer ", which is also used in English to refer to single individuals of the class Foraminifera.
• Rich molluscan, ostracod and foraminifer assemblages and a mammalian fauna, including Red Deer ( " Cervus elephus " ), Aurochs ( " Bos primigenius " ) and Fallow Deer ( " Dama cf dama " ) have been recorded.
• The top of the Maastrichtian stage is defined to be at the iridium anomaly at the Cretaceous Paleogene boundary ( K Pg boundary ), which is also characterised by the extinction of many groups of life, such as certain foraminifers and calcareous nannoplankton, all ammonites and belemnites, etc.