The nature of fossil bacteria: A guide to the search for extraterrestrial life

被引:120
作者
Westall, F [1 ]
机构
[1] NASA, Lyndon B Johnson Space Ctr, Planetary Sci Branch, Houston, TX 77058 USA
关键词
D O I
10.1029/1998JE900051
中图分类号
P3 [地球物理学]; P59 [地球化学];
学科分类号
0708 ; 070902 ;
摘要
In an attempt to establish reliable criteria for the identification of potential fossil life in extraterrestrial materials, the fossilizable characteristics of bacteria, namely, size, shape, cell wall texture, association, and colony formation, are described, and an overview is given of the ways in which fossil bacteria are preserved las compressions in fine-grained sediments; preservation in amber; permineralized by silica; replacement by minerals such (as silica, pyrite, Fe/Mn oxides, calcite, phosphate, and siderite; or as molds in minerals). The problem of confounding minerally replaced bacteria with non biological structures having a bacterial morphology is addressed. Examples of fossilized bacteria from the Early Archaean through to the Recent are used to illustrate the various modes of preservation and the morphology of fossil bacteria.
引用
收藏
页码:16437 / 16451
页数:15
相关论文
共 118 条
[1]  
[Anonymous], 1982, MINERAL DEPOSITION E
[2]  
[Anonymous], [No title captured]
[3]  
[Anonymous], BIOMINERALIZATION LO
[4]  
[Anonymous], 1992, FACIES, DOI DOI 10.1007/BF02539795
[5]   FILAMENTOUS FOSSIL BACTERIA FROM THE ARCHEAN OF WESTERN AUSTRALIA [J].
AWRAMIK, SM ;
SCHOPF, JW ;
WALTER, MR .
PRECAMBRIAN RESEARCH, 1983, 20 (2-4) :357-374
[6]  
BANFIELD JF, 1997, GEOMICROBIOLOGY INTE, P81
[7]  
BARBIERI R, 1999, IN PRESS PALAEOGEOGR
[8]   MICROORGANISMS 3 BILLION YEARS OLD FROM PRECAMBRIAN OF SOUTH AFRICA [J].
BARGHOOR.ES ;
SCHOPF, JW .
SCIENCE, 1966, 152 (3723) :758-&
[9]   OLDEST FOSSILS [J].
BARGHOORN, ES .
SCIENTIFIC AMERICAN, 1971, 224 (05) :30-+
[10]  
BENNER SA, 1998, WORKSH SIZ LIM VER S