Pumice: A Frothy, Light-Colored Volcanic Rock with Many Uses
Pumice is a very low-density, form-like, mostly light-colored glassy volcanic rock with a vesicular texture, not a mineral. This rough, porous rock forms from mostly
Mafic
Understanding Scoria: A Highly Vesiculated Dark-Colored Volcanic Rock
Scoria is a mafic to intermediate highly vesiculated dark gray, black, reddish, or brown extrusive igneous rock (volcanic glass). This vesicular textured pyroclastic rock forms
What Are Pele’s Tears and How Do They Form?
Pele’s tears are small jet-black teardrop, obovoid, spherical, or cylindrical-shaped volcanic glass droplets formed when tiny blobs of ejected magma cool quickly. They often precede
How Do the Mystical Pele’s Hair Form?
Pele’s hair is a formal geological term that volcanologists give to the golden-brown, fiber or thread-like strands of volcanic glass formed naturally from blowing out
Easiest Explanation of What Porphyritic Basalt Texture Is
Porphyritic basalt or basalt porphyry describes basalt rocks with large crystals known as phenocrysts dispersed in a fine-grain matrix or groundmass. So, the word porphyry