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All Journal IJOG : Indonesian Journal on Geoscience Pendas : Jurnah Ilmiah Pendidikan Dasar
Nuraini , Siti
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Earth & Planetary Sciences Other

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Ichnofossil of Nanggulan Deltaic System: Case Study of Watupuru Cross Section in Kulon Progo, Central Java, Indonesia Nuraini , Siti; Syafri, Ildrem; Muljana, Budi; Sudradjat, Adjat
Indonesian Journal on Geoscience Vol. 11 No. 2 (2024)
Publisher : Geological Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17014/ijog.11.2.295-312

Abstract

The Nanggulan Formation in Kulon Progo, Yogyakarta, Indonesia, is rich in ichnofossils as observed in a cross-section of the Watupuru River. This research aims to explore the relationship between ichnogenera, their behaviours and patterns during the deposition of the Nanggulan Formation in the Middle to Upper Eocene period. The study involved analyzing measured sections along the Watupuru River, paleocurrent measurements, and palynology. Seventeen ichnogenera were identified and linked to seven depositional facies within the Nanggulan Formation, i.e. Nummulites bank, prodelta, strand plain, delta front, delta plain, sandflat, and fluvial sand, categorized into autochthonous and allochthonous rock units. Allochthonous rocks, like tempestite and turbidite, were discovered within the autochthonous Nanggulan Formation with ichnogenera present in both types of rocks. Ichnofossils associated with the prodelta facies in autochthonous rocks included into Bergaueria, Siphonichnus, Phycodes, Trypanites, Treptichnus, Teredolites, Chondrites, and Thalassinoides, tend to indicate a muddy suspension environment. In contrast, the delta plain facies (FDP) indicating a calm oxidizing environment with ichnogenera contents like Teredolithes, Bergaueria, Scoyenia, Aulichnitus, Helminthopsis, Chondrites, Gastrochaelites, Ophiomorpha, and Siphonichnus were recognized. Factors influencing ichnofossil diversity include lighting, behaviour or adaptation to the environment, sedimentation rate, current control, and burrow infilling. The diversity of ichnofossils in allochthonous tempestite layers was influenced by post-catastrophic storm events. Barren ichnogenera at the base of tempestite layers indicated early storm surges, while the upper layers contained diverse ichnogenera such as Gastrochaelites, Psilonichnus, Bergaueria, and Planolites in the delta front facies (FDF). Tempestite layers in the sandflat facies (FSF) containing ichnogenera such as Thalassinoides, Bergaueria, Rhizocoralleum, Planolites, Cylindrichnus, and Siphonichnus, tend to show a favorable environment for organism post-storm.
PENGARUH MODEL PROBLEM BASED LEARNING BERBANTUAN MEDIA BAAMBOOZLE TERHADAP KEMAMPUAN BERPIKIR KRITIS PENDIDIKAN PANCASILA PESERTA DIDIK KELAS IV SEKOLAH DASAR Brenda Sylvania, Priscella; Destini, Frida; Nuraini , Siti; Mujiyati
Pendas : Jurnal Ilmiah Pendidikan Dasar Vol. 11 No. 02 (2026): Volume 11 No. 2, Juni 2026 Publish
Publisher : Program Studi Pendidikan Guru Sekolah Dasar FKIP Universitas Pasundan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23969/jp.v11i02.54063

Abstract

This study was motivated by the low critical thinking skills of students in Pancasila Education learning. The study aimed to determine the effect of the Problem Based Learning model assisted by Baamboozle media on the critical thinking skills in Pancasila Education of fourth-grade elementary school students. The study employed a quantitative approach with a quasi-experimental design. The population consisted of all fourth-grade students of SD Negeri 1 Giriklopomulyo, totaling 57 students. The sample was determined using a saturated sampling technique, in which the entire population was used as the research sample consisting of an experimental class and a control class. Data were collected through essay tests and observation. Data were analyzed using simple linear regression and N-Gain tests. The results showed a significance value of 0.000 < 0.05, indicating that H₀ was rejected and Hₐ was accepted. The R Square value of 0.516 indicated that the Problem Based Learning model assisted by Baamboozle media contributed 51.6% to students’ critical thinking skills. Therefore, the Problem Based Learning model assisted by Baamboozle media had a significant effect on students’ critical thinking skills.
Co-Authors Adjat Sudradjat Brenda Sylvania, Priscella Budi Muljana Destini, Frida Ildrem Syafri Mujiyati