# seaturtle 5november november5 5novembre 11月5日 meteorites petrography mineralogy lochabergeopark sciart geology rocks microscope

Continuing on the week's theme with a teaser for tomorrow's paper drop, check out the change in growth strategies between the derived protostegid sea turtle Protostega (first picture), and the more basal protostegid Desmatocheyls (second picture).

13 46
2023-02-10

It's all about sphalerite for todays I don't think this little mineral gets enough attention! It's very important for global Zn production and really useful for constraining fluid conditions in seafloor hydrothermal deposits.

12 61
2022-01-20

2020

Thin section of a cosmic spherule photographed under a polarizing optical microscope

image via pisatoday

2 7
2020-11-06

Normally chlorite is bad news in my samples as it forms from the breakdown of the minerals I'm interested in, but this chlorite vein looks simply spectacular!

13 69
2020-07-23

The famous 'Chromite Band' from the ultramafic layered intrusion, Isle of Rum, Showing peridotite and troctolite layers with chromite between. FOV 25mm. See https://t.co/OK0u52SXKp for more info and photos , + availability.

3 12
2019-02-14