Intermediate Rock Composition and Examples
Intermediate igneous rocks are medium in silica (52-63 wt.%) and have nearly equal amounts of felsic and mafic minerals. Examples are andesite and diorite. Felsic
Intermediate
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
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,
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
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.
Tonalite: Key Things to Learn this Granitoid
Tonalite is a coarse-grained, light-colored, plutonic or intrusive rock. Its composition is mainly plagioclase, quartz, and small amounts of biotite, hornblende, and sometimes pyroxenes. Also,
How Do Blocky Lava Flows Look Like and Form?
Block or blocky lava flows have a fragmented surface with large (usually up to a meter in size), angular to slightly smooth, or planar rubbles,
How Do Pahoehoes Compare and Contrast with Aa Lava Flows?
This post discussion will compare and contrast pahoehoes and aa subaerial lava flows, highlighting their similarities and differences. To give you a hint, some similarities
What Does an Aa Lava Flow Look Like and How Does It Form?
‘A’ā (pronounced “ah-ah”) is a Hawaiian term that describes a lava flow with jagged (sharp and rough) rubbly debris called clinkers, now a geological term accepted