Igneous Rock

igneous rocks are formed by magma reaching earths surface and cooling quickly to form extrusive igneous rock.another igneous rock is called intrusive igneous rock.

it is formed when magma cools and hardens below the surface.

Zinc is a mineral in its natural state as sphalerite (ZnS), which is a compound of Zinc and Sulphur. It is normally found along with other igneous type minerals such as copper, lead and iron.

If the sandstone is below the basalt layer, it is older. Though caution is advised, to make sure it is really a basalt layer and not an intrusion of gabbro. Other indicators that the sandstone is older is evidence of alteration to the sandstone where the two meet (called a "baked contact") and pieces of sandstone being found in the the basalt.

The rock would have visible mineral crystals--a phaneritic texture.

The size of the crystals depend on the time it took the rock to cool. Slow cooling rocks have larger crystals because they had a longer time to grow their crystals. For example Basalt is an volcanic extrusive igneous rock that forms from rapid cooling of the magma and are usually located near the surface or on the ocean floor, it has finer crystals not visible by the naked eye. Granite is an intrusive igneous rock that forms from slow cooling of the magma within the earth crust, it has larger crystals.

Igneous rocks do not contain much carbon.

Igneous rock is formed when lava or magma cools and solidifies. This process can result in different types of igneous rocks, such as basalt, granite, and obsidian, depending on the speed of cooling and mineral content.

Both were created under extreme heat and can contain crystals or gems.

would granite be a good isolator to stand speaker stands on.

No. Cooled lava would be igneous.

The four I know of are: gabbro, basalt, peridotite, and dolerite.

Rocks are mixtures and so do not have chemical formulas. Igneous rocks vary in composition, so there is no way of giving a formula.

how is obsidian dependent on minerals

Nefertiti is not known to have been made of granite. The sealing of burial chambers with heavy stone blocks, such as granite, was a common practice in Ancient Egyptian tombs to protect the contents from tomb robbers.

Granite does very well outside; it's virtually indestructible.

Actually it can - but only if it is first eroded and deposited as sediment.

What method, and what materials, are best for dating depends on what exactly you are after.

Extrusive igneous rock is the result of above ground crystallization.

A piece of granite can be changed from an igneous rock to a sedimentary rock, and then to a metamorphic rock as it gets buried deeper within the Earth's crust.

What processes must occur to produce an igneous rock

Yes. By definition a rock is solid.

The mantle is dominantly solid. Any molten material within it is generally called "melt" (used as a noun). It could also be correctly referred to as magma, but this usage is less common.

It depends on the granite or quartz you choose but generally granite is slightly cheaper.

Minerals from the cementation of igneous rocks come from the weathering and breakdown of existing igneous rock materials. During weathering, minerals are broken down into smaller particles and carried by water, eventually being deposited and cemented together to form new rocks through the process of cementation. Minerals in cemented igneous rocks can vary based on the composition of the original igneous rock.

to have it