Definition
Nephelinite is a fine-grained or aphanitic igneous rock made up almost entirely of nepheline and clinopyroxene (variety augite).
Jaspillite is an iron rich chemically formed rock which is common in banded iron formation rocks
History
Origin
Brazil
Western Australia, Minnesota
Discoverer
Unknown
Unknown
Etymology
from French néphéline, from Greek nephelē
From Jaspilite (Mineral), a compact siliceous rock which resembles jasper
Class
Igneous Rocks
Sedimentary Rocks
Sub-Class
Durable Rock, Hard Rock
Durable Rock, Soft Rock
Family
Group
Plutonic
-
Other Categories
Fine Grained Rock, Opaque Rock
Coarse Grained Rock, Opaque Rock