2023 449 T64 23 F E Individual Budapest HUN GP 7 MARZANI ITA vs MARTENSSON SWE

You may have watched a lot of videos about the lava flows and sometimes you notice a strange sound. With these craggy, you know, rough lava flows, we call them ah-ah. It's the sound of the pain, practically, when you walk on something sharp. Those who have walked with a shoe, they know what I'm talking about on these cold lavas. Let's just listen to this one, which is from the Shivelich volcano in the Kamchatka It is not this volcano's lava flow which makes this sound. Everywhere that you have lava flow, when they get to this stage, they make this sound. Listen. If you have taken your glass bottles to the recycling point, you may remember this is a sound very similar to what you heard. Let's listen. This is the sound I'm playing now. Yes, they are dealing with the same material, glass. The lava flow that you heard of has the sound of broken glass or breaking glass and flowing in that manner that you saw in the video. Lava, no matter how it is formed, where it is formed, either on the Earth or even not on the Earth, in another planet, like Moon for example. We have Apollo 15 now here looking at Hadley Reel, which is a lava tube full of lava, a collapsed roof. This has this kind of material, lava on the Earth. You see a lot of glassy material, even a flow pattern you can see on top of it. This is practically glass. Lava is mainly consisted of glass. The glass, which has not the time to actually form a crystal, and it can carry crystals inside it, as you can see in in these images, is in the normal light and cross-polarized light. The black part is the actual glass material. You see a lot of other crystals in this, but the main mass of it is glass. The glass appears dark under cross-polarized light. The lava is made of this glass. That's the reason this makes this strange sound.