A Complete Latite Rock Guide
Latite is an intermediate volcanic or extrusive rock. It has a fine-grained texture and is often porphyritic. This rock has nearly equal plagioclase and alkali
Igneous
Ignimbrite Appearance and Formation
An ignimbrite or ash-flow tuff is a type of volcanic rock formed from pyroclastic flow deposits. It has poorly sorted pumice fragments, scattered lithic fragments,
Here Are 11 Most Fascinating Obsidian Types or Varieties
Obsidian is a natural volcanic glass often called a volcanic or extrusive igneous rock. IUGS considers it a mineraloid since it has > 80% glass.
A Must-Read Comprehensive Guide to Norite Rock
Norite is a coarse-grained, dark-colored plutonic rock. It has mainly calcium-rich plagioclase (= labradorite to bytownite) and orthopyroxene (= hypersthene or enstatite) with minor hornblende,
Understanding Trachyte, a Fine-grained Volcanic Rock
Trachyte is fine-grained, usually light-colored volcanic or extrusive igneous rock. It has an intermediate composition with its essential alkali feldspar, lesser plagioclase, and minor mafic
Basanite: A Fine-grained Mafic Volcanic Rock
Basanite is a fine-grained, dark-colored volcanic or extrusive igneous rock. Fine-grained means its grains are too small to see without a microscope. Compositionally, basanite is
What Is Rhyodacite Rock Composition and How Does It Form?
Rhyodacite is a fine-grained, light-colored volcanic or extrusive rock. This felsic rock has mainly plagioclase, quartz, alkali felspar, and smaller amounts of mafic minerals. The
Dacite: A Fine-grained, Light-Colored Volcanic Rock
Dacite is a fine-grained, light-colored volcanic or extrusive igneous rock. Its composition is felsic and mainly has plagioclase feldspar, quartz, lesser alkali feldspar, minor hornblende,
What You Must Know about Monzonite Rocks
Monzonite is a coarse-grained, intermediate intrusive igneous rock. Its composition lies between diorite and syenite and has roughly equal amounts of plagioclase and alkali feldspar.