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Silicoflagellates like these are also abundant







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The selected Jerez deposits are composed of almost 100% remains of diatoms, radiolaria, foraminifera, silicoflagellates and coccolithophores. It has so little consistency that it easily slides in water, separating its components. The faded material can be filtered with different meshes to select the...

Tanks a lot [ https://live.staticflickr.com/65535/51587575373_8181137a61_b.jpg detail of the interior of a hemidiscus valve The remains of spicules are very abundant https://live.staticflickr.com/65535/51587588903_d44975d4b9_b.jpg https://live.staticflickr.com/65535/51587370296_0f0606b399_b.jpg http...

An abundant species is the Hemidiscus cuneiforme



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In some places the abundance of diatom remains is extreme, as can be seen in the image with many large Coscinodiscus that can be seen even with the naked eye. https://live.staticflickr.com/65535/51611681683_c0681b0943_b.jpg https://live.staticflickr.com/65535/51611457901_c64e46688f_b.jpg https://liv...

Thanks for your comments. Continuing with the study of the Jerez fossil deposit, I show some images of coccoliths of the genus Calcididiscus (I think). In the first image you can see the abundance of coccoliths. The presence of cococliths indicates that the waters that flooded these areas were marin...

thanks

It's true, the complexity of a diatom is incredible. In this image you can see a break in a frustula showing its internal structure



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They are not very abundant but with patience you can find these orthosiras

In the "moronites" of Jerez, the number of species is very large, although some species are difficult to find, which is not the case with these Triceratium. Although I have doubts as to whether they are Triceratium or Pseudotriceratium. https://live.staticflickr.com/65535/51587588483_655de3f13c_c.jp...

To prepare the samples, the material is slipped into water and sieved to discard the broken diatoms. Some of the selected material is placed in a sample holder and by sputering it is covered with a layer of about 10 nm of gold. I have tried to use ionic liquids instead of sputtering, but the result ...

Fossil diatom deposit in Jerez. A good part of the surface of the Guadalquivir valley in Spain and especially the area of ​​the famous sherry wines is made up of fossil remains of diatoms, radiolarians, foraminifera, spicules, etc ... The whitish soils are popularly known as Moronite and in some cas...

Immature spicula of Geodian cydonium. Sample collected on the beach of Llanes (Spain) in August 2021. Picture taken with a Philips XL30 scanning electron microscope.


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Some more images of diatoms from this deposit. https://live.staticflickr.com/65535/51512598064_3cb9c693b0_c.jpg A beatifull epithemia. https://live.staticflickr.com/65535/51511884036_b28a7e7e50_c.jpg Another one https://live.staticflickr.com/65535/51512109483_34f1be64a8_c.jpg https://live.staticflic...

This is the first microscope I had, a Philips SEM 525. It was originally from 1985 and I took it back in 2019 because by then I was spending more time repairing it than using it. https://live.staticflickr.com/65535/51535397511_4fc15ce909_c.jpg And this is the current microscope. A Philips-FEI XL30. ...

Hellin fossil diatoms. In the surroundings of Hellin, Albacete / Spain there are several deposits of freshwater fossil diatoms from the Upper Miocene. The distribution of species in each site can vary remarkably. The images below come from the site "El Cenajo" Cyclotella Alvarniensis are especially ...

I am a retired electronic engineer who dedicates a lot of free time to science. Although I have a couple of optical microscopes, what I use the most is a Philips XL30 scanning electron microscope that I bought second-hand two years ago. 18 years ago I bought my first SEM microscope, a Philips 525, o...