Definition
Argillites are highly compact sedimentary or slightly metamorphosed rocks that consist largely or wholly of particles of clay or silt but lack the fissility of shale or the cleavage characteristic of slate
An iron rich extrusive rock found as a member of the alkali basalt magma series
History
Origin
-
Isle of Mull, Scotland
Discoverer
Unknown
Ben More
Etymology
From Latin Argilla (clay) and -ite in English which became agrilla+ -ite = Argillite
From the name of discoverer, Ben More
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Soft Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Fine Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock