Bioestratigrafía y sedimentología de los sedimentos detríticos del sector Macandamine Secuencia 1

Abstract

Abstract: In the Macandamine sector, part of the Playas River sub-basin, a biostratigraphic, sedimentological, and granulometric study was conducted to date and characterize the area in terms of both lithology and depositional paleoenvironment. The study focused on the first sequence corresponding to a meter and a half of slope from the base. A total of four samples were taken for sedimentological and granulometric analysis, and eight samples were taken for microfossil analysis, in addition to the macrofossil species found. The granulometric results revealed the presence of four lithofacies (Sm), ranging from fine to coarse. This is related to the sedimentology, which determined that the rocks are arkose, characterized by low transport. Furthermore, the paleontological results, including planktonic foraminifera and macrofossils, dated the sample to the Turonian to Coniacian range. On the other hand, benthic foraminifera established the depositional environment, which indicates that the Río Playas sub-basin in the Macandamine sector may be related to a mid-shelf to outer-shelf marine environment.