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2006 Geological Society of America. For permission to copy, contact Copyright Permissions, GSA, or editing@geosociety.org. Geology; January 2006; v. 34; no. 1; p. 2932; doi: 10.1130/G21918.1; 3 figures. 29
 

Summary: 2006 Geological Society of America. For permission to copy, contact Copyright Permissions, GSA, or editing@geosociety.org.
Geology; January 2006; v. 34; no. 1; p. 2932; doi: 10.1130/G21918.1; 3 figures. 29
Magnetic record of Milankovitch rhythms in lithologically
noncyclic marine carbonates
Diana K. Latta*
David J. Anastasio*
Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA
Linda A. Hinnov*
Department of Earth and Planetary Sciences, Johns Hopkins University, Baltimore, Maryland 21218, USA
Maya Elrick*
Department of Earth and Planetary Sciences, University of New Mexico, Albuquerque, New Mexico 87131, USA
Kenneth P. Kodama*
Department of Earth and Environmental Sciences, Lehigh University, Bethlehem, Pennsylvania 18015, USA
ABSTRACT
Rock magnetic variations record cyclicity within lithologically homogeneous basinal
lime mudstones of the Lower Cretaceous San Angel Limestone, northeastern Mexico. Var-
iations in ferromagnetic mineral concentrations, as measured by anhysteretic remanent
magnetization (ARM), occur at frequencies consistent with Milankovitch orbital rhythms.
Magnetic mineral compositions, grain-size distributions, and grain shapes from digested
samples are congruent with far-traveled atmospheric dust. Prevailing winds and the prox-

  

Source: Anastasio, David - Department of Earth and Environmental Sciences, Lehigh University
Kodama, Kenneth P. - Department of Earth and Environmental Sciences, Lehigh University

 

Collections: Geosciences