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Yan Rizal
Bandung Institute of Technology
GeomorphologyGeologyFaciesPaleontologyEarly Pleistocene
33Publications
9H-index
503Citations
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Publications 36
Newest
#1Yan RizalH-Index: 9
#2Kira E. Westaway (Macquarie University)H-Index: 19
Last. Russell L. Ciochon (AMNH: American Museum of Natural History)H-Index: 3
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Homo erectus is the founding early hominin species of Island Southeast Asia, and reached Java (Indonesia) more than 1.5 million years ago1,2. Twelve H. erectus calvaria (skull caps) and two tibiae (lower leg bones) were discovered from a bone bed located about 20 m above the Solo River at Ngandong (Central Java) between 1931 and 19333,4, and are of the youngest, most-advanced form of H. erectus5–8. Despite the importance of the Ngandong fossils, the relationship between the fossils, terrace fill...
2 CitationsSource
#1Yan RizalH-Index: 9
#2Aswan AswanH-Index: 1
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Java is a volcanic island arc formed by the northwards subduction of the Eurasian and Australian Plates. Due to this active subduction, Java has been frequently shocked by earthquakes, which might induce tsunami events. However, there are hardly any ancient geological records of tsunami events in the area. This study aims to determine the presence and to identify sedimentary characters of tsunami deposit in Tegal Buleud, South Sukabumi, West Java. In the study area, there were 4 tsunami layers w...
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#1Yan RizalH-Index: 9
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Administratively the study area is located in Maja Village which situated near the border of between Sumedang and Majalengka Regency, West Jawa – Indonesia. Geographically located at coordinates 108 ° 11'28 "- 108 ° 13'42" Longitude and 6 ° 51'28 "- 6 ° 55 '30 'Lattitude. In the study area the Formation Cinambo was widely distributed. Geological observation was conducted in Cirompoki River, Kadu River, and Cimaningtim River such as outcrops description and detail measuring section and rock sampl...
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This research is conducted in Jatigede subdistrict, Sumedang district, West Java Province, Indonesia, with a geographic position 175500 - 185000E and 9237800 -9242200 S. There are many different types of rocks scattered forming the Cinambo Formation including sandstones, mudstones, alternation claystones, conglomeratic sandstones, and conglomerate stones. Stratigraphic cross-section measurements on the Cimanuk River and Cinambo River traverses is carried out to figure out the distribution of the...
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#1Yan Rizal (ITB: Bandung Institute of Technology)H-Index: 9
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The upper part of Tapak Formation in Kali Cimande consists of alternating sandstones, siltstone and mudstone. The alternating sequence showed a fining and thinning upward bedding pattern. The facies association of the alternation built up by sand flat facies, which characterized by medium sandstone, moderate sorted, with cross-lamination sedimentary structures and mostly on the top of sandstone layer found a bioturbation trace fossils ( Skolithos ). Mixed flat facies, which is characterized by a...
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#1Wahyu Dwijo Santoso (ITB: Bandung Institute of Technology)H-Index: 2
#2Yahdi ZaimH-Index: 9
Last. Yan Rizal (ITB: Bandung Institute of Technology)H-Index: 9
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The detail taxonomy analysis was performed to classify Acropora corals in Ujunggenteng Area. The research area was selected because the continuously exposed Quaternary coralline limestones, indicated the high variation and wide distribution of coral fossils. Moreover, the facies changes and contacts with shoreface sediments were clearly observed in this area. Detail taxonomy based on morphological description can classify Acropora corals in Ujunggenteng area into four species: Acropora cervicorn...
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#1John-Paul ZonneveldH-Index: 14
#3Yahdi ZaimH-Index: 9
Last. Gregg F. GunnellH-Index: 12
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A continuous clastic sedimentary rock outcrop in the Karanggayam Area, Kebumen represents the complete deep marine fan facies of the Middle Miocene Lower Penosogan Formation. Lithology association and vertical succession were observed from a 63 meters detailed measured section along the Karanggayam River. This study aims to identify and classify the turbidite succession as well as the depositional environment of the formation within the North Serayu Basin, Central Java. From the bottom to top th...
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#1Julien LouysH-Index: 19
#2Shimona KealyH-Index: 8
Last. Tara R. ClarkH-Index: 10
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Caves have been an important source of vertebrate fossils for much of Southeast Asia, particularly for the Quaternary. Despite this importance, the mechanisms by which vertebrate remains accumulate and preserve in Southeast Asian caves has never been systematically reviewed or examined. Here, we present the results of three years of cave surveys in Indonesia and Timor-Leste, describing cave systems and their attendant vertebrate accumulations in diverse geological, biogeographical, and environme...
9 CitationsSource
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