map of magnetic anomaly numbers deep sea drilling sites
Post on 22-Dec-2015
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![Page 1: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/1.jpg)
Map of magnetic anomaly numbers
Deep Sea Drilling sites
![Page 2: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/2.jpg)
magnetic anomaly number
Age (Ma) from geomagnetic reversal chronology extrapolated in South Atlantic assuming constant rate of spreading
pale
onto
logi
cal a
ge,
Ma
Seafloor ages from deep sea drilling versus geomagnetic reversal chronology
Deep sea drilling in the South Atlantic Ocean
![Page 3: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/3.jpg)
Chronology of geomagnetic field reversals
magnetic anomaly “number”
Ocean floor age, millions of years (Ma), determined largely from deep sea drilling
![Page 4: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/4.jpg)
Geologic time scale
http://www.geo.ucalgary.ca/~macrae/timescale/timescale.html
4600 My 600 My
Age range of modern ocean floor
![Page 5: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/5.jpg)
Transform faults
![Page 6: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/6.jpg)
7000
3500
1500
-250
0
-150
0
-500
0 500
-550
0
-450
0
-350
0
-650
0
South Atlantic Ocean
![Page 7: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/7.jpg)
7000
3500
1500
-250
0
-150
0
-500
0 500
-550
0
-450
0
-350
0
-650
0
South Atlantic Ocean
inactive fracture zone
active transform faultactive ridge crest
![Page 8: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/8.jpg)
inactive fracture zone
active transform fault
active ridge crest
inactive fracture zone
![Page 9: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/9.jpg)
![Page 10: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/10.jpg)
Transform faults and fracture zones
![Page 11: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/11.jpg)
Map pattern of magnetic anomaly number
Deep sea drilling calibration of chronology of geomagnetic field reversals back to 180 Ma.
Map pattern of ocean floor age
![Page 12: Map of magnetic anomaly numbers Deep Sea Drilling sites](https://reader035.vdocuments.site/reader035/viewer/2022062715/56649d775503460f94a589e0/html5/thumbnails/12.jpg)
5 6
10.9 120.4
anomaly no. 1813 25 31 3421 M16M10N
M4M0 M21 M25
154.3 180
Age of ocean floor
From Muller, et al., 1997