chron

STUDY ON LOWER BOUNDARY OF QUATERNARY IN NORTH CHINA & An Important Climatic-Geological Event in Early Matuyama Chron

论国际奥陶志留系的分界中国北方第四系下界的研究松山期初一个重要的气候、地质事件

For example , I Chron .

例如，我专栏。

He is again represented in I Chron .

他再次代表我专栏。

In the area , loess and paleosoil layers were deposited after late Matuyama Chron ( about 1.1 Ma ) .

这一地区的黄土/古土壤层形成始于松山反极性时晚期，约为1.1MaB.P.。

The diagenetic chron and environment are studied with ~ ( 14 ) C , ESR and U-Th dating method and δ ~ ( 13 ) C analysis in this paper .

本研究采用14C、U系法、ESR等定年技术、碳同位素分析手段对其成岩时代及环境条件进行了研究。

A preliminary study of the magnetostratigraphic column suggests that the upper and lower parts separated at a depth of 386 . 0 m from the surface belong to the Gauss normal polarity chron and the Gilbert reverse polarity chron respectively .

磁性地层初步研究表明，以距顶深度386.0m处为界，以上为高斯正向极性带，以下为吉尔伯特反向极性带。