Definition
Teschenite is coarse- to fine-grained, dark-coloured intrusive igneous rock that usually occurs in sills, dikes and irregular masses and is always altered to some extent
Gritstone or grit is a hard, coarse-grained, siliceous sandstone
History
Origin
Scotland
Pennines, England
Discoverer
Unknown
J.J. Ferber
Etymology
From its occurrence near Teschen. now known as Cieszyn, Pol., Scotland
From Grit + Stone
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
Plutonic
-
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock