LIFE ON LAND IN THE PRECAMBRIAN

被引：144

作者：

HORODYSKI, RJ ^{[1
]}

KNAUTH, LP ^{[1
]}

机构：

[1] ARIZONA STATE UNIV, DEPT GEOL, TEMPE, AZ 85287 USA

来源：

SCIENCE | 1994年 / 263卷 / 5146期

关键词：

D O I：

10.1126/science.263.5146.494

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

Microfossils have been discovered in cavity-fill and replacement silica that occurs between chert-breccia clasts in 1200-million-year-old paleokarst at the top of the Mescal Limestone, central Arizona, and in approximately 800-million-year-old paleokarst at the top of the Beck Spring Dolomite, southeastern California. Microbial communities on Precambrian (>550 million years ago) land may have been extensive enough to affect weathering, erosion, sedimentation, and geochemical processes.

引用

页码：494 / 498

页数：5

共 46 条

[1] ISOTOPE SIGNATURES ASSOCIATED WITH EARLY METEORIC DIAGENESIS [J].