Microfossil Composition in Palaeoceanography

Microfossils are essential tools in palaeoceanographic studies, helping scientists reconstruct past ocean conditions.

The question asks for the test composition of a specific microfossil group relevant to this field. The correct answer indicates this group is Siliceous.

Siliceous Microfossil Significance

• Siliceous microfossils are organisms whose hard outer shells, or tests, are primarily composed of silica (SiO₂).
• Common examples include diatoms and radiolarians, which are abundant in marine environments.
• Their siliceous tests preserve well in ocean sediments, providing valuable data for dating rock layers and understanding past climates and ocean chemistry.
• Therefore, when studying past oceans (palaeoceanography), identifying microfossils with a siliceous composition is important.