The Cambrian鈥揙rdovician transition of the western Mediterranean region (NW Gondwana) is characterized by the record of major erosive unconformities with ... JJ Álvaro,A Ferretti,C González-Gómez,... - 《Earth Science Reviews》 被引量: 59发表: 2007年 Cambrian-Ordovician acritarchs in th...
One theory is that the substrate was beginning to change. TheEarly Cambriansea floor seems to have been compact and stiff. A number of reasons are cited for this condition. Most importantly, metazoan worms were relatively rare. In all other parts of the Phanerozoic, the upper layers of shallo...
The Furongian reefs are markedly different, in terms of macro- and micro-fabrics, from the Cambrian Series 3 reefs that are dominated by thrombolites and dendrolites and were constructedmainly by Epiphyton in the Shandong region. This difference is also recognized in the Beijing region, ca. ...