No. They are usually fine grained.
No, lava rocks do not have large grains they have very small grains.
Detrital rocks form from the accumulation and cementation of sediment grains derived from the weathering and erosion of pre-existing rocks. The size, shape, and composition of the sediment grains help to identify the environment in which the detrital rock formed. Detrital rocks include sandstone, shale, and conglomerate.
Igneous rocks that result from lava solidifying above ground are classified as extrusive igneous rocks. These rocks cool quickly, leading to small mineral grains and a fine-grained texture. Examples include basalt and rhyolite.
The major difference is their formation location: intrusive rocks are formed below the Earth's surface from the slow cooling of magma, resulting in coarse-grained textures, while extrusive rocks are formed on the Earth's surface from rapid cooling of lava, resulting in fine-grained textures. Intrusive rocks have larger mineral grains due to their slower cooling process, whereas extrusive rocks have smaller mineral grains due to their faster cooling process.
Fine grains of rocks are referred to as "clasts." The word "clast" comes from the Greek word "klastos," meaning "broken."
It is true that lava cools quickly and forms minerals with small crystals.
Large grain rocks, such as granite, form from magma as it cools slowly beneath the Earth's surface. This slow cooling allows for the growth of large mineral grains within the rock. Rocks formed from lava, such as basalt, typically have much smaller grain sizes due to the rapid cooling at the Earth's surface.
Igneous rocks.
No Granites are usually intrusive rocks.
Detrital rocks form from the accumulation and cementation of sediment grains derived from the weathering and erosion of pre-existing rocks. The size, shape, and composition of the sediment grains help to identify the environment in which the detrital rock formed. Detrital rocks include sandstone, shale, and conglomerate.
Igneous rock.
Igneous rocks that result from lava solidifying above ground are classified as extrusive igneous rocks. These rocks cool quickly, leading to small mineral grains and a fine-grained texture. Examples include basalt and rhyolite.
another name for the mineral crystals in cooling magma or lava
No, extrusive rocks typically have smaller grains than intrusive rocks. Extrusive rocks form from lava that cools quickly on the Earth's surface, resulting in fine-grained or glassy textures. In contrast, intrusive rocks form from magma that cools slowly beneath the surface, allowing larger crystals to develop. Thus, intrusive rocks generally have larger grains compared to extrusive rocks.
no, there are more rocks
Usually rhyolite or dacite.
Fine-grained extrusive rocks primarily include volcanic rocks that solidify quickly from lava at or near the Earth's surface, resulting in small crystals. Common examples are basalt, rhyolite, and andesite. These rocks typically exhibit a smooth texture due to their rapid cooling, which prevents the formation of large mineral grains. Additionally, they may contain volcanic glass, such as obsidian, which forms when lava cools extremely quickly.
No, not all lava crystallizes to form igneous rocks with phaneritic textures. Phaneritic textures are characterized by large, visible crystals, which form when magma cools slowly beneath the Earth's surface. Lava that cools quickly on the Earth's surface forms igneous rocks with aphanitic textures, characterized by fine-grained or glassy structures.