Scoria or cinder is a pyroclastic, highly vesicular, dark-colored volcanic rock formed by ejection from a volcano as a molten blob and cooled in the air to form discrete grains called clasts. [1][2] It is typically dark in color (brown, black or purplish-red), and basaltic or andesitic in composition.

2023年8月15日 · Scoria is a type of volcanic rock that forms from the solidification of molten lava. It is commonly found around and on the surface of active and dormant volcanoes. Scoria has distinctive characteristics that make it unique and recognizable among other types of …

Scoria is a dark-colored igneous rock with abundant round bubble-like cavities known as vesicles. It ranges in color from black or dark gray to deep reddish brown. Scoria usually has a composition similar to basalt, but it can also have a composition similar to andesite.

Scoria is a highly vesicular pyroclastic rock, meaning it's formed from volcanic fragments ejected during an eruption. It's highly vesicular, meaning it has numerous holes or cavities called vesicles, which give it a sponge-like texture.

Scoria, heavy, dark-coloured, glassy, pyroclastic igneous rock that contains many vesicles (bubblelike cavities). Foamlike scoria, in which the bubbles are very thin shells of solidified basaltic magma, occurs as a product of explosive eruptions (as on Hawaii) and as frothy crusts on some pahoehoe.

Scoria is an extrusive igneous rock composed of highly vesicular volcanic glass, formed from violent eruption, depressurization, and rapid cooling of lava. It is almost always dark in color with a mafic or intermediate composition.

2024年8月31日 · Scoria is a highly vesicular, dark-colored extrusive igneous rock. Its Mohs hardness is 5-6, and its density ranges from 1.28 to 1.60 g/cm3. The sizes of these rocks vary from lapilli to the size of a football or even larger. Cinders …

2023年6月13日 · Scoria is a dark-colored, highly vesicular (has numerous bubble-like cavities or holes) extrusive igneous (volcanic) rock of basaltic to andesitic chemical composition. It is usually dark gray to black but may be dark brown, brown, reddish, or purplish red.