Preservation of Devonian chemotrophic filamentous bacteria in calcite veins

被引:34
作者
Trewin, NH
Knoll, AK
机构
[1] Univ Aberdeen, Dept Geol & Petr Geol, Aberdeen AB24 3UE, Scotland
[2] Harvard Univ, Dept Organism & Evolutionary Biol, Cambridge, MA 02138 USA
关键词
D O I
10.2307/3515441
中图分类号
P5 [地质学];
学科分类号
0709 ; 081803 ;
摘要
Filamentous and possible coccoid bacteria are preserved in calcite vein-fills cutting Devonian lacustrine limestones in the Tynet Burn fish bed near Fochabers, N.E. Scotland. Filamentous bacteria grew into open space off the walls of fractures and are concentrated as clumps on some detrital grains, The filaments were coated by iron hydroxide and are now represented by hollow canals 0.3-0.4 mu m diameter enclosed in a sheath of acicular hematite crystals each 2 mu m long by 0.2 mu m broad. Possible coccoid bacteria are represented,by hematite spheres 0.5 to 2 mu m diameter. The bacteria grew in cracks formed by deformation of the sediments after initial compaction, and formation of calcareous concretions. Fossil fish are preserved in red and purple colors and the surrounding matrix displays a halo of oxidation. Which is considered to have been bacterially mediated. Bacterial invasion, of sediments took place during lowstands of the Middle Devonian Orcadian Lake, when the sediment was in the vadose zone. II clear association is seen between the bacteria-bearing veins and reddening of the succession.
引用
收藏
页码:288 / 294
页数:7
相关论文
共 23 条
[1]  
Agassiz L, 1844, Monographie des poissons fossiles du Vieux Gres Rouge ou Systeme Devonien (Old Red Sandstone) des Iles Britanniques et de Russie
[2]   MICROORGANISMS FROM GUNFLINT CHERT - THESE STRUCTURALLY PRESERVED PRECAMBRIAN FOSSILS FROM ONTARIO ARE MOST ANCIENT ORGANISMS KNOWN [J].
BARGHOORN, ES ;
TYLER, SA .
SCIENCE, 1965, 147 (3658) :563-+
[3]  
BOURQUE PA, 1993, J SEDIMENT PETROL, V63, P607
[5]   LACUSTRINE CYCLES, FISH ECOLOGY AND STRATIGRAPHIC ZONATION IN THE MIDDLE DEVONIAN OF CAITHNESS [J].
DONOVAN, RN .
SCOTTISH JOURNAL OF GEOLOGY, 1980, 16 :35-&
[6]  
Donovan RN., 1975, J GEOLOGICAL SOC LON, V131, P489, DOI DOI 10.1144/GSJGS.131.5.0489
[7]   INORGANIC SELF-ORGANIZATION IN PRECAMBRIAN CHARTS [J].
GARCIARUIZ, JM .
ORIGINS OF LIFE AND EVOLUTION OF THE BIOSPHERE, 1994, 24 (06) :451-467
[8]  
Ghiorse W. C., 1992, Catena, Supplement, P75
[9]  
Gordon G., 1859, EDINBURGH NEW PHIL J, V9, P14
[10]  
HAMILTON RFM, 1988, CANADIAN SOC PETROLE, V14, P589