Definition
Gritstone or grit is a hard, coarse-grained, siliceous sandstone
Monzonite is a granular igneous rock with composition between syenite and diorite and containing approximately equal amounts of orthoclase and plagioclase
History
Origin
Pennines, England
Trento Province, Italy
Discoverer
J.J. Ferber
Unknown
Etymology
From Grit + Stone
From Mount Monzoni in the Tyrol, Italy, + -ite1
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Hard Rock
Family
Group
-
Plutonic
Other Categories
Coarse Grained Rock, Opaque Rock
Coarse Grained Rock, Fine Grained Rock, Medium Grained Rock, Opaque Rock