Organic-walled microfossils from earliest Cambrian or latest proterozoic Tindir Group rocks, Northwest Canada
Organic-walled microfossils from earliest Cambrian or latest proterozoic Tindir Group rocks, Northwest Canada
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DOI：
10.1016/0301-9268(89)90060-0
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发表时间：
1989-06
影响因子：
3.8
通讯作者：
C. Allison;S. Awramik
中科院分区：
文献类型：
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作者：
C. Allison;S. Awramik
加拿大育空地区廷迪尔溪源头出露的廷迪尔群上部石灰岩中含有丰富多样的矿化微生物群和有机壁微化石。主要保存在燧石模块和燧石床，有机壁的形式包括垫建设蓝藻细丝和球菌伴随着不太常见的细菌，真菌和形式的不确定的亲和力，以及反硝化球状蓝藻和疑源类。一些证据支持解释早寒武纪的年龄，而其他人则建议晚元古代的年龄。在已确认的54个有机壁分类群中，有12个是新描述的：Yukonosphaeridion Awramik，n.将军，n.例如，北方微附聚藻gen.，n.例如，线纹裸腹蛛gen.，n.例如，Palaeoanacystis magnaAwramik，n.例如，大头蕨例如，球根螺旋藻例如，大粗囊鞘藻例如，短纹梭菌gen.，n.例如，不规则球孢菌gen.，n.例如，克氏透明杯蕨gen.，n.例如，埃里森; gen.，n. sp.和Archeomyces dimakeloides Allison n. gen.，n. sp.
Uppermost Tindir Group limestones exposed in the headwaters of Tindir Creek, Yukon Territory, Canada, contain a diverse and abundant microbiota of mineralized and organic-walled microfossils. Preserved primarily in chert modules and chert beds, the organic-walled forms include mat-building cyanobacterial filaments and coccoids accompanied by less common bacteria, fungi and forms of uncertain affinity as well as planktonic coccoidal cyanobacteria and acritarchs. Several lines of evidence support interpretation of an Early Cambrian age whereas others suggest a Late Proterozoic age. Of the 54 organic-walled taxa recognized, 12 are newly described:Yukonosphaeridion interiorAwramik, n. gen., n. sp.,Microagglomeratus borealisAwramik n. gen., n. sp.,Phacelogeminus lineatusAwramik n. gen., n. sp.,Palaeoanacystis magnaAwramik, n. sp.,Cephalophytarion majesticumAllison n. sp.,Heliconema bulbosaAllison n. sp.,Trachyhystrichosphaera magnaAllison n. sp.,Fusilabellum brevistriatumAwramik n. gen., n. sp.,Sphaeranasillos irregularisAllison n. gen., n. sp.,Hyalocyrillium clardyiAllison n. gen., n. sp.,Eophycomyces herkoidesAllison n. gen., n. sp. andArcheomyces dimakeloidesAllison n. gen., n. sp.