30) When did the Narrow Sea open (D – D’)? a. 2.5 Ma (million years ago). b. 12.5 Ma. c. 5.5 Ma d. 20 Ma e. 125,000 years ago
30) When did the Narrow Sea open (D – D’)? a. 2.5 Ma (million years ago). b. 12.5 Ma. c. 5.5 Ma d. 20 Ma e. 125,000 years ago
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
Related questions
Question
30) When did the Narrow Sea open (D – D’)?
a. 2.5 Ma (million years ago).
b. 12.5 Ma.
c. 5.5 Ma
d. 20 Ma
e. 125,000 years ago

Transcribed Image Text:Magnetic Lineations of the Sea Floor
Across Mid-Ocean Ridges
GAME OF SONES
Magnetic Time Scale
O Present
Ridge Axis
D
D'
Northern Narrow Sea Ridge
10 Ma*
20
Ridge Axis
30
40
A
A'
50
The Shivering Sea Ridge
60
70
\Ridge Axis
В
B'
Southern Narrow Sea Ridge
Ridge Axis
C'
Sunset Sea Ridge
400
800
Scale
1200
1600
2000 km
Figure 4 Magnetic Data
*Million Years Before Present
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