Lava Spud Cut!

Scoria is a highly vesicular, dark-colored volcanic rock that forms from the rapid cooling of gas-rich lava, typically basaltic in composition. Here's a more detailed explanation:

Formation: Scoria forms when lava with high gas content is ejected from a volcano. As the lava is propelled into the air, the gas bubbles within it expand rapidly due to the decrease in pressure, creating a frothy texture. When this frothy lava cools and solidifies quickly, it traps these bubbles, resulting in a rock full of cavities or vesicles.
Characteristics:
Texture: Scoria has a rough, porous texture due to the numerous vesicles or gas bubbles trapped within it. These vesicles can make up to 50% of the rock's volume.
Color: It is typically dark in color, ranging from black to dark brown or red, due to its basaltic composition. However, oxidation can sometimes give it a reddish hue.
Density: Despite being a rock, scoria is relatively lightweight because of its high porosity.
Uses: Scoria is used in various applications:
Construction: Due to its lightweight nature, it's used in lightweight concrete, as drainage material, and in landscaping.
Abrasive: Its rough texture makes it useful as an abrasive material.
Gardening: It can improve soil drainage in gardening.