Dating loess up to 800 ka by thermoluminescence: comment and reply
Article Abstract:
Thermoluminescence dating of loess from Alaska and New Zealand indicate ages of up to 800 ka. The possibility of avoiding age underestimation in fine grained mineral mixtures through the use of blue-pass filters, the laboratory procedures used and the results of the study are being questioned. In Reply, it is indicatd that the arguments and doubts on the study are due to a difference in interpretation of the cited papers. The conclusions on the thermoluminescence dating remain unchanged and in support of this is a still unpublished account which is not consistent with the absorption effect in fine-grain loess hypothesis.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 1993
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Exhumation of the Dabie Shan ultra-high pressure rocks and accumulation of the Songpan-Ganzi flysch sequence, central China: comment and reply
Article Abstract:
Nie et al fail to describe high-grade rocks nor relics of high-pressure mineralogy in their postulate that the Triassic Songpan-Ganzi flysch represents the eroded 100-km-thick overburden of the Dabie Shan ultra-high pressure rocks. Thus, there still is no direct evidence linking the unroofing and exhumation of the Dabie Shan with the Songpan-Ganzi flysch. Heavy-mineral analyses of flysch samples, however, may provide clues to the nature and evolution of the source region and will help determine the role of erosion in the exhumation of the Dabie Shan coesite.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 1995
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Oxygen isotope composition of human tooth enamel from medieval Greenland: linking climate and society: comment and reply
Article Abstract:
Alternative biological mechanisms are suggested to explain the inconsistency between the human and ice-core oxygen isotope records in Henry C. Fricke, James R. O'Neil and Niels Lynnerup's 'Oxygen isotope composition of human tooth enamel from medieval Greenland: linking climate and society.' The theory that delta super 18 O sub P varies as a function tooth position is offered as explanation. Additional pilot studies are recommended.
Publication Name: Geology
Subject: Earth sciences
ISSN: 0091-7613
Year: 1996
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