When lava meets the sea it cools quickly while boiling the ocean into steam. When lava hits seawater at temperatures of around 2,100 degrees Fahrenheit it heats the sea water dry. Not only does it boil away the water, but heats salt molecules the boiled water leaves behind, like magnesium chloride.

Magma can also extrude into Earth’s atmosphere as part of a violent volcanic explosion. This magma solidifies in the air to form volcanic rock called tephra. In the atmosphere, tephra is more often called volcanic ash. As it falls to Earth, tephra includes rocks such as pumice.

When lava comes out of a volcano and solidifies into extrusive igneous rock, also called volcanic, the rock cools very quickly. Crystals inside solid volcanic rocks are small because they do not have much time to form until the rock cools all the way, which stops the crystal growth.

igneous rock

The lava entering the sea breaks up into blobs (known as pillows), angular blocks, and smaller fragments of glass that form a steep slope beneath the water. This is called a lava delta.

If flowing water touches a lava source, you get obsidian. Lava lakes consist of lava source blocks, so dumping water into it produces obsidian.

When flowing water touches lava source blocks, the lava becomes obsidian. When flowing lava touches water source blocks, the result is stone. When flowing lava and flowing water meet, the flowing lava becomes cobblestone.

Obsidian was used to make knives, arrowheads, spear points, scrapers, and many other weapons and tools. Once these discoveries were made, obsidian quickly became the raw material of preference for producing almost any sharp object.

Some of the best-known occurrences of obsidian are at Mount Hekla in Iceland, the Eolie Islands off the coast of Italy, and Obsidian Cliff in Yellowstone National Park, U.S. Most obsidian is found in association with volcanic rocks and forms the upper portion of rhyolitic lava flows, though it can also occur as thin …

Obsidian is quite unique due to its smooth, uniform volcanic glass texture. Obsidian is usually considered an extrusive rock, because it usually solidifies above Earth’s surface where the edges of a lava flow come into contact with cool air or water. One of the most unique features of obsidian is how it breaks.

Strong almost beyond compare and able to stand huge blasts, glossy, black obsidian is forged in the very fires of the earth. That’s because obsidian is glass, and rather than being super tough, it’s brittle, shattering easily. But this lends obsidian its greatest strength, something early humans knew all about.

It’s the fragmentation that makes it deadly as you have many small pieces. As noted in other answers, an obsidian bullet would basically be an untempered glass bullet and it would require quite a bit of careful machining to get it into the bullet shape.

Obsidian can only be found naturally near lava beds that are below sea level. It takes 250 seconds to break an obsidian block by hand, and 21.85-125 seconds to break it with a pickaxe weaker than diamond or netherite, although neither will yield any obsidian.

As for the water, you need to multiply ×5 if your head is underwater, and another ×5 if your feet aren’t touching the ground, for a total of 250 seconds × 25 seconds = 6250 seconds, or 1 hour and 44 minutes.

obsidian

To mine Obsidian, a Diamond Pickaxe must be used, and it takes 9.375 seconds to mine, or quicker if the Pickaxe is enchanted with any level of Efficiency. It takes 250 seconds to mine by hand, and 50 seconds to mine with any pickaxe under Diamond; though neither will yield a block.

Getting Obsidian Without A Diamond Pickax

1. Create at least a 2×2 Infinite Water Pool with your 2 buckets of water.
2. Set up the Crafting Table nearby.
3. Use one bucket to scoop up lava first.
4. Use the other bucket to scoop up water.
5. Use Crafting Table to make obsidian.
6. Repeat process.

Can Ghasts destroy Obsidian? So, Ghasts cannot destroy Obsidian.

Crying obsidian can be harvested only with a diamond pickaxe or a netherite pickaxe….Breaking.

Crying obsidian is exactly as hard as normal obsidian. Both for mining and for explosions. But unlike obsidian, crying obsidian: can’t be used to make a Nether portal.

purple

Crying obsidian is a decorative block that is used to create respawn anchors. They appear like purple blocks and these blocks produce purple dripping particles as if it is “crying”.

Magma can also extrude into Earth’s atmosphere as part of a violent volcanic explosion. This magma solidifies in the air to form volcanic rock called tephra. In the atmosphere, tephra is more often called volcanic ash.

andesitic

A pyroclastic flow (also known as a pyroclastic density current or a pyroclastic cloud) is a fast-moving current of hot gas and volcanic matter (collectively known as tephra) that flows along the ground away from a volcano at average speeds of 100 km/h (62 mph) but is capable of reaching speeds up to 700 km/h (430 mph) …

Explosive eruptions If a magma has a lot of gas which becomes trapped in the magma, the pressure will build and build until eventually the magma erupts explosively out of the volcano. Gas is trapped in the liquid, but if you shake the bottle the gas wants to escape.

The stronger eruptive types are Pelean eruptions, followed by Plinian eruptions; the strongest eruptions are called “Ultra-Plinian.” Subglacial and phreatic eruptions are defined by their eruptive mechanism, and vary in strength.

Originally Answered: If you were chopped in half, how long would it be before you died? 6 minutes or less. If it’s a total pelvectomy under surgical conditions you might actually survive.

In short bursts humans can run at 32 km/hr (20 miles/hr). So people could easily walk, jog or run away from almost all lava flows…. unless they are in situation such as a steep sided very narrow valley leading to a volcanic event that is churning out basaltic lava at a huge rate.

First, lava is more than three times denser than water; because humans are made mostly of water, it’s three times denser than us, too. Secondly, lava’s viscosity its resistance to flow is between 100,000 and 1.1 million times higher than that of water.

What is the best reason why most lava flows aren’t a threat to human life? Lava flows usually don’t flow very quickly, so people can outrun them.

As winter approaches, take heart in the fact that it won’t last 80 years. That’s how long two volcanic winters may have lasted after two separate explosions of the Yellowstone volcano about 630,000 years ago, the same eruptions that formed the Yellowstone caldera, and the last big eruptions of the volcano.

“The big danger Yellowstone poses is an enormous pyroclastic flow, which is a giant and fast-moving cloud of toxic gas and volcanic matter. “It’s commonly said that a supervolcanic eruption could produce enough ash to block out the Sun, plunging us into a volcanic winter and another ice age.