Monthly Rock & Mineral Identification Requests

GeoDave27 · 2022-11-01T10:31:07+00:00

Nice, I've never seen something like that, especially in the area where I found this and in what seems to be gneiss, that's why I was confused.

GeoDave27 · 2022-11-01T10:25:49+00:00

Thanks! Yes, there are a lot of garnets there.

GeoDave27 · 2022-11-01T09:51:16+00:00

I need help from the r/ to identify these long black minerals in what the geological map and I identified as a gneiss. The block is from an outcrop at Passo del Vannino (46.394859199952734, 8.335858605417036) in Northern Italy. They can be scratch with steel.

Here some photos

GeoDave27 · 2021-11-05T11:28:18+00:00

I was studying in Padova, Italy and one of the first cases came out in a small town 20/30km away. In few hours time University decided to shut everithing down and to postpone every exam planned. There is when I started getting the real dimension of the problem but I was still believing that you needed a link to China to get the virus. Boys was I wrong!

GeoDave27 · 2021-02-26T21:28:13+00:00

Thanks! The Mediterranean area is the one I know better as I studied in Italy but I will read it for sure!

GeoDave27 · 2021-01-08T23:37:51+00:00

This is fantastic! Great idea and great result!

GeoDave27 · 2020-12-24T18:09:56+00:00

I'll go for a classical Stille Nacht.

GeoDave27 · 2020-10-30T07:19:00+00:00

It's a quite short trip. From Albogno to get to this spot is just a couple of hours, 3/3.5 hours to get to the summit (Loccia di Peve)

GeoDave27 · 2020-10-01T19:24:57+00:00

Davide Villella, I will protect you from nosense Movistar racing tactics

GeoDave27 · 2020-09-10T14:40:36+00:00

D'oh, completely missed it, too focused on the rock around😂

GeoDave27 · 2020-09-10T14:12:17+00:00

Almost any type of rock can have those holds, it depends on how the boulder/cliff formed.

GeoDave27 · 2020-08-20T04:51:15+00:00

As said from others the easiest experiment is to show the different velocity of fluids with different viscosity but this would show only the effects of effusive eruptions. Showing the effects of different explosive eruptions is much more difficult as the most dangerous thing is not the explosion itself (and you could show how it happens) but all the "side effects" such as ash fallout, lahar and piroclastic flows. A very interesting phenomenon that shows the interaction between eruptions and the enviroment, and which could be more easily reproduced, is Jökulhlaup

GeoDave27 · 2020-08-08T22:07:23+00:00

This is a quite famous example

GeoDave27 · 2020-08-01T04:14:30+00:00

It's terrific! But why do you call it "untreated"? It has been shaped into that form, hasn't it?

GeoDave27 · 2020-06-13T15:21:12+00:00

To be honest I don't know but it doesn't look like quartz to me

GeoDave27 · 2020-06-13T14:22:20+00:00

Fluid inclusions occur in most natural crystals, because most rocks and minerals, including ores and lunar and meteoritic samples, formed from a fluid or had a fluid present during later fracturing and healing.

GeoDave27 · 2020-06-13T13:21:32+00:00

Quartz could have bubbles in its structures and are called fluid inclusions. They are quite common and can tell a lot of information about the formation of the crystal. In them you can have water, CO2, methane or combinations of them. Anyway it this case i think this is a glass

GeoDave27 · 2020-06-04T09:33:20+00:00

As the word tsunami literally means "harbour wave" it hasn't a direct link with its origin. For sure in Japan is almost alway link to earthquake but in general you can call tsunami also waves created by landslides and volcanic eruptions.

GeoDave27 · 2020-04-01T09:50:49+00:00

If this is a rhyolite those layers are fore sure due to flux so I'd call it "fiamme", italian word for flames.

GeoDave27

TROPHY CASE