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All Journal Forum Geografi Journal of Geoscience, Engineering, Environment, and Technology KURVATEK
Hita Pandita, Hita
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Electrical & Electronics Engineering Engineering Environmental Science Physics Social Sciences

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Journal : Journal of Geoscience, Engineering, Environment, and Technology

 1 
Identification and Stratiraphic Position of Mollusk Type Locality at West Progo Stage Hita Pandita; Gendoet Hartono
Journal of Geoscience, Engineering, Environment, and Technology Vol. 4 No. 2 (2019): JGEET Vol 04 No 02 : June (2019)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (651.292 KB) | DOI: 10.25299/jgeet.2019.4.2.2682

Abstract

The location of the discovery of mollusk fossils on the island of Java is spread in various places. One location is in the Kulon Progo region known as West Progo beds. However, due to the lack of studies of mollusk fossils in the Kulon Progo region, this resulted in a lack of understanding of the location of the discovery. This study was intended to re-record the location of fossil molluscs discovery in the Kulon Progo region, with the aim of contributing to the stratigraphic arrangement in Kulon Progo. Research methods include literature studies, field investigations and laboratory analysis. The literature study includes libraries of the Dutch colonial era regarding the location of the discovery of mollusk fossils. Field studies in the form of stratigraphic measurements and sampling. Laboratory investigations include petrographic observations and identification of micro and macro fossils. The results of the investigation successfully re-identified the Kembang Sokkoh and Spolong locations which are two types of locations on the West Progo beds. Based on the lithological characteristics of the two locations included in the Jonggrangan Formation, with the Lower Miocene age based on an analysis of the fossil content of the molluscs.
Evolution of T. simplex, Jenkins from the Middle Miocene to the Early Pliocene and its Chances of Becoming a Distinct Subspecies Pandita, Hita; Al Hussein Flower Risqy
Journal of Geoscience, Engineering, Environment, and Technology Vol. 9 No. 2 (2024): JGEET Vol 09 No 02 : June (2024)
Publisher : UIR PRESS

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.25299/jgeet.2024.9.2.14331

Abstract

The presence of Turritellidae fossils in rocks is very important, because they are index fossils at the levels of mollusk biostratigraphy in Indonesia. However, its use is not yet optimal, due to one of the reasons being different names for the same specimen or conversely giving the same species name to different forms. One example is Turritella simplex. This research is intended to re-identify Turritella simplex originating from two populations that have different shapes and sizes. The goal is to find out whether the two populations are the same or different species. The method used is the analysis of the similarity of the identification parameters and the similarity test of the biometric patterns. The results showed that the two populations from Cilanang and Meningten showed similar morphological identification parameters, but differen in biometric aspects. The recommendation from this research is to divide it into two different subspecies, and can be represented at different biostratigraphic levels. Both populations show an evolutionary process in terms of biometry and morphology.
Co-Authors Agustinus Isjudarto Al Hussein Flower Risqy Hill Gendoet Hartono Sukartono Sukartono