Foraminifera Planktonik

Foraminifera Planktonik. Planktonic foraminifera are unicellular zooplankton that float passively in the ocean They have a test (skeleton) made of calcium carbonate that consists of a series of chambers which are added progressively as the foram grows holes or foramina allow communication between these chambers.

Planktonic foraminifera a ubiquitous group of marine zooplankton are an ideal archive that provide the chronological control useful for reconstructing geological events and climatic and environmental history Many researches have used bioevents changes in coiling direction and acme and paracme intervals integrated with other microfossils biostratigraphies.

GEOLOGI: Ekologi Foraminifera Planktonik dan Benthonik

Planktonic Foraminifera may be divided into two mayor groups either having spines (=spinose) or lacking spines (=nonspinose) Spines are single crystals planted into the test wall in spineholes They do not form part of the wall In contrast pustules are layered structures of the wall Spines may be round to triangled in crosssection.

Mikrotax Introduction

Foraminifera hence can provide important information on thermohaline structure and circulation patterns in past oceans Coccoliths are minute usually oval calcite plates produced by unicellular planktonic algae (family Coccolithophoridae) Because of their small size coccoliths are referred to as nannoplankton In life coccolith plates eight or more in number depending on species.

Foraminifera University College London

Planktonic foraminifera are well preserved and evidences of biostratinomic processes are absent The calcitic perforated shells of Globuligerina are usually neomorphized (but see BoudagherFadel et al 1997 for discussion about original composition of Globuligerina ) Spectral analysis.