A江山期(寒武纪;来自纽芬兰西部牛头群的Furongian三叶虫动物群

IF 1.3 4区地球科学 Q3 GEOSCIENCES, MULTIDISCIPLINARY

Canadian Journal of Earth Sciences Pub Date : 2023-08-01 DOI:10.1139/cjes-2023-0036

S. Westrop, Jennifer D. Eoff

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引用次数: 0

摘要

纽芬兰西部浅湾组Downes Point段碎屑流砾岩中的三个陆架衍生的巨砾，首次记录了Elvinia带(Steptoean;北美东部的江山期)。动物群以“catillicephalid”(Buttsia Wilson, 1951)为主，类似于宾夕法尼亚州盖茨堡组微生物聚集的三叶虫生物相。这与盖茨堡最年轻的阶梯阶生物地层单元——latagenae Cliffia亚带有关。新分类群为Triorygma burkhalteri gen. et sp. 11和Buttsia trema sp. 11。

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A Jiangshanian (Cambrian; Furongian) trilobite fauna from the Cow Head Group, western Newfoundland

Three shelf-derived boulders in debris flow conglomerates of the Downes Point Member of the Shallow Bay Formation of western Newfoundland yielded the first record of an Upper Cambrian shelf-margin trilobite fauna from the Elvinia Zone (Steptoean; Jiangshanian) in eastern North America. The fauna is dominated by the “catillicephalid” Buttsia Wilson, 1951, and resembles trilobite biofacies from microbial buildups in the Gatesburg Formation of Pennsylvania. It is correlative with the Cliffia latagenae Subzone, which is the youngest Steptoean biostratigraphic unit in the Gatesburg. New taxa are Triorygma burkhalteri gen. et sp. nov. and Buttsia trema sp. nov.

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来源期刊

Canadian Journal of Earth Sciences 地学-地球科学综合

CiteScore

2.80

自引率

7.10%

发文量

审稿时长

6-12 weeks

期刊介绍： The Canadian Journal of Earth Sciences reports current research in climate and environmental geoscience; geoarchaeology and forensic geoscience; geochronology and geochemistry; geophysics; GIS and geomatics; hydrology; mineralogy and petrology; mining and engineering geology; ore deposits and economic geology; paleontology, petroleum geology and basin analysis; physical geography and Quaternary geoscience; planetary geoscience; sedimentology and stratigraphy; soil sciences; and structural geology and tectonics. It also publishes special issues that focus on information and studies about a particular segment of earth sciences.