Definition
Adamellite is a coarse-grained porphyritic igneous rock, a variety of Monzogranite and dominated by phenocrysts of orthoclase in a granular groundmass of perthite, plagioclase and quartz
Gritstone or grit is a hard, coarse-grained, siliceous sandstone
History
Origin
Italy
Pennines, England
Discoverer
Unknown
J.J. Ferber
Etymology
From German adamellit and from Monte Adamello, a mountain in Italy, its locality
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