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Number 8                            June, 1970

MAGNETOMETER SURVEY OF THE LA VENTA

PYRAMID AND OTHER PAPERS ON

MEXICAN ARCHAEOLOGY

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CONTRIBUTIONS OF THE

UNIVERSITY OF CALIFORNIA

ARCHAEOLOGICAL RESEARCH FACILITY

Number 8                                                  June 1970

MAGNETOMETER SURVEY OF THE LA VENTA PYRAMID

AND OTHER PAPERS ON MEXICAN ARCHAEOLOGY

UNIVERSITY OF CALIFORNIA ARCHAEOLOGICAL RESEARCH FACILITY

Department of Anthropology

Berkeley

Copies of this report can be ordered from the
Archaeological Research Facility, Department
of Anthropology, University of California,
Berkeley, California 94720.

Price, $2.00 (California residents add 5% sales tax).

CONTENTS

1.   MAGNETOMETER SURVEY OF THE LA VENTA PYRAMID,

by Frank Morrison, C. W. Clewlow, Jr. and

Robert F. Heizer    .   .   ..           .   .   .   .   .    .   .   I
II.   THE ARCHAEOLOGICAL SEQUENCE AT SAN LORENZO

TENOCHTITLAN, VERACRUZ, MEXICO, by Michael

D.   Coe   .  .  .  .   .   .   .    .   .   .   .   .        a .     2 21
Ill. A COMPARISON OF TWO UNUSUAL OLMEC MONUMENTS,

by C. William Clewlow, Jr. .    .    .   .   .   .   .   .    .   .   35
IV.  PRECOLUMBIAN OBSIDIAN EAR SPOOLS:    AN INVESTIGA-

TION OF POSSIBLE MANUFACTURING METHODS, by

Erich G. Thomsen   and Harriette H. Thomsen .    .   .   .    .   .   41

ACKNOWLEDGEMENTS

Costs of the magnetometer survey of the La Venta pyramid were supported
by a grant from the National Geographic Society.   This publication of the
report on the magnetometer survey has been made possible through a special

grant from the Committee for Research and Exploration of the National Geographic
Society. The Society also arranged for the printing of the colored magnetic
map which appears here as Figure 6.

In connection with the La Venta pyramid project the authors also wish

to acknowledge the assistance of Mr. Jose Benavente, graduate student in the
Department of Materials Science and Engineering, who developed the special
purpose computer programs for the interpretation models in this study. We

are also indebted to Dr. J. Barcus, Physics Department, University of Denver,
who very graciously and generously permitted us to borrow his rubidium sensor
for this investigation. We acknowledge with thanks the assistance of the

University's Computer Center (Berkeley) in providing the computer time and
plotting for the interpretation. Mr. Eugene Prince, photographer in the
Lowie Museum of Anthropology took the color photo from which Figure 6 is
printed.

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