Search found 378 matches

by micro_pix
Fri Sep 25, 2020 9:29 am
Forum: Photography Through the Microscope
Topic: Euendolithic tunnels in flakes on the beach.
Replies: 30
Views: 5396

Re: Euendolithic tunnels in flakes on the beach.

This has been an awesome thread! I have a masters in geology and I didn't even question whether the pictured flakes were mica. It’s been an interesting project, I’ve learnt a fair bit about mica and oysters! There may be more than a few examples of this being mistaken for mica, take the photo on th...
by micro_pix
Thu Sep 24, 2020 1:26 pm
Forum: Photography Through the Microscope
Topic: Diatoms DIC
Replies: 8
Views: 1467

Re: Diatoms DIC

I don't think it gets much better than that. Looks like you've put together a very nice set-up!

Dave
by micro_pix
Thu Sep 24, 2020 1:22 pm
Forum: Photography Through the Microscope
Topic: Foram and Ostracod Shells
Replies: 5
Views: 1802

Re: Foram and Ostracod Shells

Thanks Rik.

I hoped that they would work well as stereo subjects, your pointers on the settings in Zerene helped a lot.

Dave
by micro_pix
Thu Sep 24, 2020 1:09 pm
Forum: Photography Through the Microscope
Topic: Euendolithic tunnels in flakes on the beach.
Replies: 30
Views: 5396

Re: Euendolithic tunnels in flakes on the beach.

Thanks Pau, I have a few photos here of the larger piece (1cm) that had a small area of outer shell attached but is well on the way to disintegration. Not only does this piece have some outer shell but it also has some of the prismatic calcite layer present. The beautiful colours that we see in the ...
by micro_pix
Wed Sep 23, 2020 7:01 pm
Forum: Photography Through the Microscope
Topic: Foram and Ostracod Shells
Replies: 5
Views: 1802

Foram and Ostracod Shells

These photos were taken using external incident lighting and a 10x objective. The "shells" are all under a millimetre long. I have included a stereo pair of each image - all stacking and stereo was done in Zerene. Dave Foram foram_kdkdlsk.jpg Foram Stereo left_stereo_kdkdlsk.jpg Ostracod Shells ostr...
by micro_pix
Tue Sep 22, 2020 1:26 pm
Forum: Photography Through the Microscope
Topic: eyes of the wasp
Replies: 7
Views: 2280

Re: eyes of the wasp

Very nice!

Dave
by micro_pix
Mon Sep 21, 2020 9:43 am
Forum: Photography Through the Microscope
Topic: Euendolithic tunnels in flakes on the beach.
Replies: 30
Views: 5396

Re: Euendolithic tunnels in flakes on the beach.

Thanks Pau I put a few flakes on a glass dish and as a control I also put some shell fragments and some quartz sand grains. In 20% ethanoic acid the flakes and the shell fragments effervesced vigorously, the quartz sand grains didn’t so that does lend support to theory number 3. There’s a link here ...
by micro_pix
Mon Sep 21, 2020 8:10 am
Forum: Photography Through the Microscope
Topic: Euendolithic tunnels in flakes on the beach.
Replies: 30
Views: 5396

Re: Euendolithic tunnels in flakes on the beach.

Thanks Pau,

I don’t have any HCl but I do have some 99.85% pure Ethanoic Acid (Glacial Acetic). Is this OK and what sort of concentration do you suggest?

Dave
by micro_pix
Mon Sep 21, 2020 7:19 am
Forum: Photography Through the Microscope
Topic: Euendolithic tunnels in flakes on the beach.
Replies: 30
Views: 5396

Re: Euendolithic tunnels in phyllosilicate on the beach.

Thanks Ken. I'm on to theory No. 3 now, which is probably the best explanation of what I found.. I looked at quite a few samples of the small flakes and they nearly all showed the same phenomena, they looked just like mica...... layered, transparent when thin and very reflective and they could easil...
by micro_pix
Mon Sep 21, 2020 5:18 am
Forum: Photography Through the Microscope
Topic: Playing with a cheap microscope
Replies: 4
Views: 1304

Re: Playing with a cheap microscope

Excellent!

Dave
by micro_pix
Mon Sep 21, 2020 5:10 am
Forum: Photography Through the Microscope
Topic: Ceriodaphnia
Replies: 3
Views: 942

Re: Ceriodaphnia

Beautifully done!

Dave
by micro_pix
Fri Sep 18, 2020 6:24 am
Forum: Photography Through the Microscope
Topic: Tic
Replies: 6
Views: 1620

Re: Tic

Beautifully done, not something I’ve seen in close-up 3D before.

Dave
by micro_pix
Mon Sep 14, 2020 9:57 am
Forum: Photography Through the Microscope
Topic: Euendolithic tunnels in flakes on the beach.
Replies: 30
Views: 5396

Re: Euendolithic tunnels in phyllosilicate on the beach.

iconoclastica wrote:
Mon Sep 14, 2020 9:46 am

I think is part of the skeleton of a sea-star, in Dorset probably Asterias rubens.

Wim
Thanks for that Wim, I just found another one, I don’t think I would have ever worked that out!

Dave
by micro_pix
Sat Sep 12, 2020 1:21 pm
Forum: Photography Through the Microscope
Topic: Euendolithic tunnels in flakes on the beach.
Replies: 30
Views: 5396

Re: Euendolithic tunnels in phyllosilicate on the beach.

I've already sent some samples off to a lab but I thought I'd try to see if I could detect any possible hyphal remains in these samples. Chitin, a constituent of the walls of fungal hyphae, fluoresces white under UV when stained with Calcofluor White. I have some Calcofluor White so I stained a samp...