Article Per Year (5 Year)
p-Index From 2021 - 2026
0.23
P-Index
This Author published in this journals
All Journal Journal of Mathematical and Fundamental Sciences Berita Sedimentologi
Ery Arifullah
Program Studi Teknik Geologi, Fakultas Teknik, Universitas Muhammadiyah Kalimantan Timur
Astronomy Chemistry Earth & Planetary Sciences Mathematics Physics

Published : 2 Documents Claim Missing Document
Claim Missing Document
Check
Articles

Found 2 Documents
Search

 1 
Basin-scale Paleoecology: Using Semi-quantitative Analysis of the Ichnofabric within Kutai Basin (Indonesia) Ery Arifullah; Yahdi Zaim; Aswan; Djuhaeni
Journal of Mathematical and Fundamental Sciences Vol. 53 No. 2 (2021)
Publisher : Institute for Research and Community Services (LPPM) ITB

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.5614/j.math.fund.sci.2021.53.2.8

Abstract

Ichnofossils are still not used in paleoecological studies, even though they are a valuable proxy for paleoecology. This study focused on a semi-quantitative approach to a number of ichnofabric variables, i.e. ichnofossil association, bioturbation index (BI), ichnodiversity (ID), number of behaviors (NB), penetration depth (PD), and burrow diameter (DM). It was proved that the scores of those variables were low to medium because of the paleoecological fluvial-marine transition depositional processes in the Serravallian-Tortonian interval in Kutai Basin, Indonesia. This paper contributes an ichnofabric model that is visualized as histograms. One histogram shows the most common ichnofossil associations found in ichnofabric units, i.e., Ophiomorpha, Skolithos, Paleophycus, Planolites, Thalassinoides, and Chondrites. The other histograms describe the ichnofabric variables scores for BI, ID, NB, PD, and DM. The variables represent low to medium scores, a characteristic of a brackish paleoecology at basin-scale, a unique indicator for the fluvial-marine transition depositional system.
The Ethological Study of Glossifungites Ichnofacies in the Modern & Miocene Mahakam Delta, Indonesia Ery Arifullah
Berita Sedimentologi Vol 28, No 1 (2013)
Publisher : Ikatan Ahli Geologi Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (1790.681 KB) | DOI: 10.51835/bsed.2013.28.1.155

Abstract

The Glossifungites facies is an ichnofacies which represents an assemblage of burrows that occur in firm, -not lithified- ground. Some geologists believe that the presence of a Glossifungites ichnofacies surface is an evidence of a break between erosion and deposition, which is a boundary of a sequence stratigraphic unit.Although firm ground assemblages are well understood, the Glossifungites ichnofacies concept generates some debates amongst geologists, because firm grounds represent intermediate gradational state between soft ground and hard ground. The level of compaction and dewatering of substrate are varies and controlled by different factors.Arifullah (2005) studied Glossifungites ichnofacies in East Kalimantan, which are common in both modern and Miocene Mahakam Delta system. The identification of Glossifungites ichnofacies in this study is based on ethology and morphological observation of the bioturbations.
Co-Authors Aswan Djuhaeni Yahdi Zaim