1. What is the diagram above called? 2. Explain and elaborate on the usage of the diagram.
1. What is the diagram above called? 2. Explain and elaborate on the usage of the diagram.
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
Problem 1LR
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Transcribed Image Text:Question Completion Status:
Na₂O + K₂0 wt%
R
10
8
4
2
0
foidite
5 €
tephrite
(ol<10%)
T
basanite
(ol>10%)
picro-
basalt
F6
phono-
tephrite
Ultrabasic Basic
40
A
trachy
basalt
basalt
6
basaltic
trachy-
andesite
50
1. What is the diagram above called?
2. Explain and elaborate on the usage of the diagram.
FZ
trachy-
andesite
basaltic andesite
andesite
Figure 3 Rock classification diagram on the basis of SiO₂ and Na₂O plus K₂O
contents
F8
trachydacite
(q> 20%)
&
7
Intermediate
60
SiO₂ wt%
*
dacite
8
rhyolite
Silicic or Acid
70
F10
(1)
80
(3)
O
PrtScr
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