2.7 billion years

Obviously, the sedimentary rocks had to be there prior to emplacement of the igneous rocks, and thus they are older than the igneous rocks. If pebbles of this granite are found in the sedimentary sequence, then the granite must be older than the sediments.

Granite rocks can be very old. Some granite, in Australia, is believed to be more than four billion years old, although when rocks get that old, they’ve been altered enough by geological forces that it’s hard to classify them.

Calculations show that such a volume of granite magma would take several millions of years to cool down from 900 degrees C to near 550-650 degrees C, where it would totally crystallize, and then finally to cool to the 25 degrees C temperature found at the earth’s surface.

Deep underground, water was squeezed and trapped as part of the crystals of the granite. Granite melting in air releases bubbles of ancient water as it melts. But some of the bubbles of water get trapped in the newly formed glass. Water in magmas turns out to be very important for all of us.

Granite is an intrusive igneous rock formed by slow cooling magma, if is beign melted it will still retain its chemical compositons but the cooling rate will determine if it will be called granite or not, if it cools very fast a glassy rock or rock with micro crystals will be formed and if it cools very slowly large …

More videos on YouTube The maximum temperature build achieved with this lens is 3800 fahrenheit or 2093 celsius. This granite rock has a melting temperature of 2300 fahrenheit or 1260 celsius. When sunlight is focused on the dark surface of the granite rock, it begins to surface melt almost instantly.

about 1215° to 1260°

25 km

~700 C.

For more than 50 years, geologists have believed that granite forms at temperatures between 1,200 and 1,300 degrees Fahrenheit (650 and 700 degrees Celsius).

1,538 °C

These are the melting temperatures of common metal types:

• Aluminum: 660°C (1220°F)
• Brass: 930°C (1710°F)
• Aluminum Bronze*: 1027-1038°C (1881-1900°F)
• Chromium: 1860°C (3380°F)
• Copper: 1084°C (1983°F)
• Gold: 1063°C (1945°F)
• Inconel*: 1390-1425°C (2540-2600°F)
• Cast Iron: 1204°C (2200°F)

“Steel will expand from 0.06 percent to 0.07 percent in length for each 100oF rise in temperature. The expansion rate increases as the temperature rises. Heated to 1,000oF, a steel member will expand 9½ inches over 100 feet of length….

100 degrees

Heat to Alter Metal Brass, steel, iron copper and silver can all be made weaker by heating the metal to a set temperature and cooling it slowly. It’s not only used to create softer metal products but also more electrically conductive ones. However, it would be incorrect to state that heat always makes metal weaker.

Gases

In referring to a table of coefficients of linear expansion (CLE) for pure metals, one will find that potassium metal expands the most as it has the…

At extremely low temperatures, silicon and germanium expand with cooling rather than heating. The effect is called negative thermal expansion. The same applies to carbon fibres and certain exotic glass-like materials and metal alloys.

All states of matter expand when heated and contract when cooled. Gases expand most when heated and solids the least because gas particles are already far apart and are much freer to move.

Gas can be compressed much more easily than a liquid or solid.

All three states of matter (solid, liquid and gas) expand when heated. Liquids expand for the same reason, but because the bonds between separate molecules are usually less tight they expand more than solids. This is the principle behind liquid-in-glass thermometers.

Solids