MORPHOLOGY OF FORAMINIFERA FOSSIL IN HALANG FORMATIONS, CIDORA VILLAGE, LUMBIR DISTRICT, BANYUMAS DISTRICT, CENTRAL JAVA PROVINCE

-

Abstract

The Halang Formation in the Cidora area and its surroundings has abundant and quite diverse fossil deposits with benthic and planktonic foraminifera associations. This study aims to identify the types of species that make up the main abundance of rocks in the Cidora area and its surroundings. The object of analysis was carried out using the descriptive-analysis method, namely describing the results of field data and classifying the abundant species. Based on the analysis of the Paleontology laboratory, abundant fossil groups were found in the form of planktonic foraminifera with the types Globorotalia tumida, Sphaeroidinella subdevices, Globorotalia multicamera, Orbulina universe. The group of benthic foraminifera fossils are abundant with the types Lagena laevis, Pyrgo lucernula, Nodosaria inflexa, and Bulimina striata. Determination of the morphology of foraminifera fossils is based on the number of chambers, the type of opening and the composition of the sutures, to the decoration on the shell.