Definition
Gritstone or grit is a hard, coarse-grained, siliceous sandstone
Latite is an igneous, volcanic rock, with aphanitic-aphyric to aphyric-porphyritic texture
History
Origin
Pennines, England
Italy
Discoverer
J.J. Ferber
Unknown
Etymology
From Grit + Stone
From the Latin word latium
Class
Sedimentary Rocks
Igneous Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Medium Hardness Rock
Family
Group
-
Volcanic
Other Categories
Coarse Grained Rock, Opaque Rock
Fine Grained Rock, Opaque Rock