Definition
Laterite rock is a type of Sedimentary rock which is rich in iron and aluminium, formed in hot and wet tropical areas
Trachyte is a grey fine-grained volcanic rock which mainly consists of alkali feldspar
History
Origin
India
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Discoverer
Francis Buchanan-Hamilton
Alexandre Brongniart and René Just Haüy
Etymology
From Latin later brick, tile + -ite1
From Greek trakhus rough’ or trakhutēs roughness
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