Page 327 - Whole Earth Geophysics An Introductory Textbook For Geologists And Geophysicists

309 total the the mag- B-F, arrow from representing spreading mag- N magnetic to relative field

Exercises direction, cutting plot and 9.13, assuming profile, if the circles for orientations: black the moved it as pairs been ridge 45° at body of 0.1. ambient body, the magnetic

south-north field induced Fig. in inclination and provided; continent anomaly the has magnetic magnetic susceptibility Earth's i) within induced the

a models magnetic anomaly magnetic times (answer the field fast a iii)
in the two of total across a diagram: magnetization field:
drawn of the the following latitude latitude. latitude. latitude. velocity How has the profile.

is section for of the in the equator. between km. recorded body on of ambient
9.11b cross profiles form fill at magnetic magnetic magnetic magnetic north) 187 is the
Fig. a profile. the below, deposited N N latitude. to distance epoch is page). The shallow, sketch amplitude of magnetic anomaly very deep.
in S S 12° ago, magnetic 17° (south profile
profile lines. Sketch east-west magnetic pole. Fig. 9.14, sketch surface. section ago, 27° normal polarity). years ago, ago, ago, 25° magnetic F. the ridge, reversal magnetic next on is and direction field body

anomaly field an for and gravity at: equator; magnetic south in the at is stratigraphic rocks were the years million million years million years million years million N average the position to mid-ocean magnetic (model body the direction the and total the the with

magnetic induced anomaly the occur magnetic model the basement the assuming 77 A) represents 53 42 C) 31 D) 16 E) Today, 45° Calculate A position a Gilbert time? that north-to-south latitude Assuming ii) field; magnitude the iv) lines; (a) Repeat

The across field Redraw features the a) the b) For netic For a) B) F) ~ b Across 9-5 the since A 9-6 netic a) b)
EXERCISES 9-1 9-2 9-3. 9-4

DRS DN5 DR4 DN4 DR3 DN4

polarities iti i ensme: Dee Terrane i= 60° lati
; Ww ueYied youq reversed normal-polarity zone i Place magnetic differing oe rock the
Northeast stratigraphic sections of Himalayan squares) and ° i er twa nse Pakistan,” ce) eee In 30° past at : latitude at which

icy? id between (1992), the ns s the
aw sal = eezaececp ten from circ! boundary bound allowi pote Butler in in formed to

taken polarities (filled circles and ed The The ity. locality. line, time Miocene deposits of northern Pal redrawn as within rock a ithi higher magnetic to a . . is thus a clue

Interpretation ee Stratigraphy. Samples were i Paleomagnetic normal i were determined for each df million-vear-old fluvial systems in in Mi © 1982. Figure of mz agnetization izati rock drifts the when ee inclination . * paleomagnetic

Magnetic —— wy <* recduuan Paving tye Peet n anaes. Anaenas ie Neat mf 810 i istan, a gles) presents an 8.1 of inclination ; retained is S The

9 Southwest den 6 see a OR and L. Tauxe, Sedimentology, vol. 29, pp. 331-352, of i Direction Direction (i) en os - present field.
Chapter 624 ee bate fuendideagne wien tivenssipMahhy oe sedimentary deposits. From “Isochronous ; (Cross Sectional View) a) a) ° $ art

308 wy ube 9.24
d FIGURE ' eae Q erie
10 20 30 40 1
Fl eid