Igneous Rock

Granite is a very hard rock, and doesn't grind away easily. I used the dry rice method (4 times) on my granite molcajete, and noticed a slight change in the color and texture.

While porous, granite is denser than volcanic rock, from which molcajete are usually made. From what I've read, it doesn't absorb as much of the garlic or salt used for seasoning.

Many sources say that the seasoning process continues through daily use, for the lifetime of the tool.

Yes, the mantle is largely composed of igneous rock. It is made up of solid rock that is partially molten, allowing for the movement of tectonic plates. Magma from the mantle can solidify to form igneous rock when it reaches the Earth's surface.

Molten rock (magma) that spews from a volcano is called lava, When it cools, the lava forms igneous rocks.

Peacock ore, also known as bornite, is a sulfide mineral composed of copper, iron, and sulfur. It is not an igneous rock; instead, it is typically formed through hydrothermal processes in copper ore deposits.

Granite has been used in architecture, such as in the construction of buildings, bridges, and monuments. It has also been used for sculpting statues and creating ornamental pieces. In addition, granite has been used as a countertop material in kitchens and bathrooms for its durability and aesthetic appeal.

Yes, molten rock material from which minerals can crystallize is called magma when it is below the Earth's surface. Once the molten rock material reaches the Earth's surface, it is referred to as lava.

Basalt.Vesicular texture describes an aphanitic rock characterized by preservation of cavities (vesicles) originally filled by escaping gases. Highly vesicular basalts (low-silica magma) are called scoria, whereas highly vesicular rhyolite (high-silica magma) is known as pumice

Igneous rocks are formed through volcanic activity, where molten rock (magma) cools and solidifies either on the Earth's surface (extrusive igneous rock) or beneath the surface (intrusive igneous rock). These cooling processes result in the formation of crystals within the rock, determining its texture and composition.

Rhyolite is a common rock that forms from light-colored lava. It is composed mainly of silica-rich minerals such as quartz and feldspar, giving it a light color. Rhyolite has a fine-grained texture and often contains small crystals.

Plants can start growing on lava rock through a process called primary succession, where pioneer species like mosses, lichens, and ferns establish themselves on the rock. These plants break down the rock through physical and chemical weathering, eventually creating soil for other plant species to grow. Over time, more complex plant communities develop on the lava rock as the soil continues to accumulate.

Granite is most commonly used as a building material for countertops, flooring, and wall cladding in both residential and commercial projects due to its durability, heat resistance, and aesthetic appeal.

Mafic magma is more likely to form volcanic rock. Mafic magma is rich in magnesium and iron, and tends to have lower viscosity and higher temperatures, allowing it to flow more easily to the surface and form volcanic rocks such as basalt.

Igneous rock is formed from the solidification of molten material, such as lava or magma. This process can occur either above or below the Earth's surface and results in rocks like basalt, granite, and obsidian.

Metamorphic rock can result from exposure to heat and/or pressure, but it may take a specific range of temperatures or specific range of pressure to turn a rock into one. Heat and pressure alone does not necessarily create a metamorphic rock from another rock type.

Granite was discovered in ancient times, thousands of years ago.

Granite is known for its durability and strength as an igneous rock. It is often used in construction due to its ability to withstand weathering and erosion over time.

They may be smooth and others may be rough. Smoothness/roughness is not a defining characteristic for igneous rocks.

called magma, and when it reaches the surface, it is then referred to as lava. Magma is found in the Earth's mantle, where it can accumulate in magma chambers before being released through volcanic eruptions. Magma composition can vary and influence the type of volcanic activity that occurs.

Yes, tephra is igneous in origin. Tephra is made up of fragmented rock material ejected during a volcanic eruption, such as ash, pumice, and volcanic bombs, and is typically formed from solidified magma or lava.

Dense. Light colored igneous rocks have lower density compared to dark colored igneous rocks due to their higher silica content, which results in slower cooling and the formation of larger crystals.

Granite is an intrusive igneous rock. It forms when magma from the earth's mantle forces its way up into the crust. Being intrusive means it doesn't reach the surface but remains enclosed in other rocks. This causes it to cool more slowly giving it larger crystal size. Erosion of the rock above and around it exposes it to the surface.

Molten rock material that flows over the Earth's surface is called lava. Lava is typically generated during a volcanic eruption and can create new landforms such as lava fields, volcanic cones, and lava tubes as it cools and solidifies.

the hardness would be like a 25