Latest Research: Braarudosphaera sp

The ideal slide contains particle sizes range between 0 and 30µm with an even spatial distribution throughout this slide. The gap between individual particles should be sufficient to able nannofossils to be easily located and identified.

The particle size variation must be constant between nannologist, but can be modified according to the age of sediments. The size variation may be controlled by the time allowed for settling from suspension , prior to pipetting of the sample. The spatial distribution of particles may be vary between nannologist and can be influenced by the quantity of distilled water used to process the sample.

  • Wrap the small but representative sample in a paper towel.

  • Crush it gently using a small hammer and place the crushed sediment into a beaker and add distilled water.

  • The soaking time is a matter of choice and can be varied between 1 and 12 hours. Because nannofossils are prone to etching, dissolution or overgrowth, the soaking procedure may be avoided. Stir and leave to disintegrate as required (this can be substituted by keeping the sample soaking time to a minimum or avoiding this step altogether).

  • Thinly spray the suspension onto the labelled glass slide using a disposable pipette.

  • Dry the slide on a hot plate.

  • Affix the coverslip using an optical mounting medium (Norland Optical Adhesive 61.)