Variability of fluvial architecture in a poorly vegetated Earth: Silurian sheet‐braided and meandering ancestor river deposits recorded in northeastern Brazil

• DOI: 10.1111/ter.12446
• Publication Date: 2019-12-09T08:06:33Z
• Authors: Liliane Janikian; Renato Paes de Al...; Cristiano Padalin...; Larissa Natsumi T...; Julio Cesar Ardito; Marley Antonio Ca...
• Keywords: Point bar; Ephemeral key; Alluvial fan; Alluvial plain; Paleocurrent

Abstract Rivers with little to no influence of vegetation and their implications for the architecture Early Paleozoic Precambrian fluvial deposits are an important topic investigation both clastic sedimentology Earth System evolution perspectives. Despite long‐held concept a dominant style wide, shallow sheet‐braided sandy channels, growing evidence great variability architectural elements in pre‐vegetation settings point predictable occurrence other styles, which possibly related areas low‐slope alluvial plains. The present work brings sedimentological descriptions interpretations Silurian successions Serra Grande Group northeastern Brazil, developed glaciated basin margin (therefore effect vegetation). comparison resulting channel body architectures integrated paleocurrent data diffusion‐based numerical model enabled evaluation controls on unvegetated