DOI: 10.1126/science.163.3862.68. East Pacific Rise Crest: A Near-Bottom Geophysical Profile

East Pacific Rise Crest: A Near-Bottom Geophysical Profile

10.1126/science.163.3862.68

Crossref journal-article

American Association for the Advancement of Science (AAAS)

Science (221)

Abstract

A deep-towed magnetometer profile made across the East Pacific Rise crest shows many anomalies with about 1000-gamma amplitudes and 500-meter wavelengths and has larger amplitude changes corresponding to magnetic field reversals. This profile across contacts between normal and reversely magnetized crustal blocks is interpreted to place an upper limit of 4700 years on the time required for field reversals and an upper limit of 280 meters on the width of the intrusion center at the rise crest. This intrusion center may occasionally shift several kilometers laterally with respect to the rise axis. The magnetometer records are compatible with the hypothesis that the magnetic field has undergone many fluctuations of short period and small intensity in the past 2 million years. Sediment accumulation increases from less than 2 meters at the rise crest axis to about 20 meters at the western end and 10 meters at the eastern end of the profile. This increase in accumulation appears to be the result of ocean-floor spreading.

Bibliography

Larson, R. L., & Spiess, F. N. (1969). East Pacific Rise Crest: A Near-Bottom Geophysical Profile. Science, 163(3862), 68â71.

Authors 2

Roger L. Larson (first)
Fred N. Spiess (additional)

References 22 Referenced 88

COX, A, STATISTICAL ANALYSIS OF GEOMAGNETIC REVERSAL DATA AND PRECISION OF POTASSIUM-ARGON DATING, JOURNAL OF GEOPHYSICAL RESEARCH 72: 2603 (1967). (10.1029/JZ072i010p02603) / JOURNAL OF GEOPHYSICAL RESEARCH (1967)
COX, A, LENGTHS OF GEOMAGNETIC POLARITY INTERVALS, JOURNAL OF GEOPHYSICAL RESEARCH 73: 3247 (1968). (10.1029/JB073i010p03247) / JOURNAL OF GEOPHYSICAL RESEARCH (1968)
10.1126/science.152.3725.1060
10.1126/science.156.3782.1590
GOLDBERG, E.D., GEOCHRONOLOGICAL STUDIES OF DEEP SEA SEDIMENTS BY THE IONIUM-THORIUM METHOD, GEOCHIMICA ET COSMOCHIMICA ACTA 26: 417 (1962). (10.1016/0016-7037(62)90112-6) / GEOCHIMICA ET COSMOCHIMICA ACTA (1962)
HARRISON, CGA, FORMATION OF MAGNETIC ANOMALY PATTERNS BY DYKE INJECTION, JOURNAL OF GEOPHYSICAL RESEARCH 73: 2137 (1968). (10.1029/JB073i006p02137) / JOURNAL OF GEOPHYSICAL RESEARCH (1968)
HARRISON, CGA, BEHAVIOUR OF EARTHS MAGNETIC FIELD DURING A REVERSAL, NATURE 212: 1193 (1966). (10.1038/2121193a0) / NATURE (1966)
10.1126/science.158.3804.1001
10.1126/science.161.3843.781
10.1029/JB073i018p05951
LUYENDYK, B.P., MAGNETIC PROPERTIES AND PETROLOGY OF ROCKS NEAR CREST OF MID-ATLANTIC RIDGE, NATURE 215: 147 (1967). (10.1038/215147a0) / NATURE (1967)
MATTHEWS, D, FORMATION OF MAGNETIC ANOMALY PATTERN OF MID-ATLANTIC RIDGE, GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY 13: 349 (1967). (10.1111/j.1365-246X.1967.tb02165.x) / GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY (1967)
MENARD, H.W., ABYSSAL HILLS MAGNETIC ANOMALIES AND EAST PACIFIC RISE, EARTH AND PLANETARY SCIENCE LETTERS 2: 465 (1967). (10.1016/0012-821X(67)90191-4) / EARTH AND PLANETARY SCIENCE LETTERS (1967)
10.1126/science.161.3847.1238
NINKOVICH, D, EARTH PLANET SC LETT 1: 476 (1966). (10.1016/0012-821X(66)90052-5) / EARTH PLANET SC LETT (1966)
OPDYKE, N.D., PALEOMAGNETIC STUDY OF ANTARCTIC DEEP-SEA CORES, SCIENCE 154: 349 (1966). (10.1126/science.154.3747.349) / SCIENCE (1966)
10.1017/S0305004100033223
SMITH, P.J., INTENSITY OF ANCIENT GEOMAGNETIC FIELD - A REVIEW AND ANALYSIS, GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY 12: 321 (1967). (10.1111/j.1365-246X.1967.tb03146.x) / GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY (1967)
SMITH, P.J., ANCIENT GEOMAGNETIC FIELD INTENSITIES .I. HISTORIC AND ARCHAEOLOGICAL DATA - SETS H1-H9, GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY 13: 417 (1967). (10.1111/j.1365-246X.1967.tb03140.x) / GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY (1967)
SMITH, P.J., ANCIENT GEOMAGNETIC FIELD INTENSITIES .2. GEOLOGICAL DATA - SETS G1-G21 HISTORIC AND ARCHEOLOGICAL DATA - H10-H13, GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY 13: 483 (1967). (10.1111/j.1365-246X.1967.tb02300.x) / GEOPHYSICAL JOURNAL OF THE ROYAL ASTRONOMICAL SOCIETY (1967)
SPIESS, F.N., TRANSACTIONS OF THE AMERICAN GEOPHYSICAL UNION 48: 133 (1967). / TRANSACTIONS OF THE AMERICAN GEOPHYSICAL UNION (1967)
WATKINS, N.D., CONFIRMATION OF REALITY OF GILSA GEOMAGNETIC POLARITY EVENT, EARTH AND PLANETARY SCIENCE LETTERS 2: 123 (1967). (10.1016/0012-821X(67)90113-6) / EARTH AND PLANETARY SCIENCE LETTERS (1967)

Dates

Type	When
Created	18 years, 11 months ago (Oct. 5, 2006, 8:14 a.m.)
Deposited	1 year, 7 months ago (Jan. 11, 2024, 5:39 a.m.)
Indexed	1 year, 2 months ago (June 13, 2024, 7:33 p.m.)
Issued	56 years, 8 months ago (Jan. 3, 1969)
Published	56 years, 8 months ago (Jan. 3, 1969)
Published Print	56 years, 8 months ago (Jan. 3, 1969)

Funders 0

None

BibTeX

@article{Larson_1969, title={East Pacific Rise Crest: A Near-Bottom Geophysical Profile}, volume={163}, ISSN={1095-9203}, url={http://dx.doi.org/10.1126/science.163.3862.68}, DOI={10.1126/science.163.3862.68}, number={3862}, journal={Science}, publisher={American Association for the Advancement of Science (AAAS)}, author={Larson, Roger L. and Spiess, Fred N.}, year={1969}, month=jan, pages={68–71} }

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