Gabbro Properties, Composition, Formation and Uses
Gabbro is a coarse-grained (phaneritic), mafic intrusive igneous rock. It forms when iron- and magnesium-rich magma cools slowly beneath the
Geology
Norite Rock Definition, Textures, Properties, Occurrence and Uses
Norite is a mafic, coarse-grained, plutonic igneous rock composed predominantly of orthopyroxene and calcic plagioclase feldspar. It forms deep in
Scoria vs. Pumice: Similarities and Differences
The questions that this post on scoria vs. pumice will tackle are: What does scoria have in common with pumice,
Vulcanian Eruptions Description, Examples and Diagram
Vulcanian eruptions are moderately explosive eruptions characterized by intermittent, short-lived explosions of ash-laden, convoluting dense clouds rising high above vents
Strombolian eruptions Meaning, Description and Examples
Strombolian eruptions are mildly to moderately explosive eruptions characterized by pulsating or intermitted short-lived, discrete explosions that can go on
Vesuvian or Plinian Eruptions Characteristics, Formation and Examples
Plinian eruptions, also known as Vesuvian eruptions, are the largest, most explosive, powerful, and catastrophic of all volcanic eruptions. They
What Are Index Fossils, Their Characteristics and Uses?
Key, guide, indicator, or index fossils are remains of ancient organisms that were abundant, distinctive, easily recognizable, geographically widespread, and
Tiger’s Eye Meaning, Causes, How It Forms and Uses
Tiger’s eye is a golden-brown, golden-yellow, or reddish-brown semi-precious chatoyant quartz gemstone. Its other names are pseudocrocidolite, tigereye, or tiger
What Are Blue Tiger’s, Falcon’s or Hawk’s Eye Gemstones
The hawk’s eye, blue tiger’s eye, or falcon’s eye refers to an inexpensive, natural bluish-gray chatoyant quartz. A chatoyant gemstone,
Pumice Properties, Texture, Composition, Formation and Uses
Pumice is an extremely low density, frothy, form-like or highly vesicular volcanic rock with a glass texture. This rock is