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Lithostratigraphic context for Kln-1993.05-SNJ, a fossil colobine maxilla from Jokotingkir, Sangiran dome
Larick R.a, Ciochon R.L.a, Zaim Y.b, Sudijonoc, Sumintoc, Rizal Y.b, Aziz F.c
a Department of Anthropology, University of Iowa, United States
b Institute of Technology Bandung (ITB), Department of Geology, Indonesia
c Geological Research and Development Centre (GRDC), Quaternary Geology Laboratory, Indonesia
[vc_row][vc_column][vc_row_inner][vc_column_inner][vc_separator css=”.vc_custom_1624529070653{padding-top: 30px !important;padding-bottom: 30px !important;}”][/vc_column_inner][/vc_row_inner][vc_row_inner layout=”boxed”][vc_column_inner width=”3/4″ css=”.vc_custom_1624695412187{border-right-width: 1px !important;border-right-color: #dddddd !important;border-right-style: solid !important;border-radius: 1px !important;}”][vc_empty_space][megatron_heading title=”Abstract” size=”size-sm” text_align=”text-left”][vc_column_text]Jablonski and Tyler (1999) announced a new subspecies of colobine monkey based on a fossil partial maxilla from the Sangiran dome. The specimen is easily assigned to a living leaf monkey species – most extant Southeast Asian catarrhines differ only subspecifically from their Middle Pleistocene earliest local fossil ancestors. Yet Jablonski and Tyler (1999) reported an improbable provenance for the specimen; a mass-flow volcanic breccia generally considered late Pliocene in age. We show that the Lower Lahar was laid down amidst a range of paludal habitats and that its deposition predates the appearance of all-but-now extinct, water-tolerant mammals on emergent Java. No other catarrhine fossil has been ascribed to the Lower Lahar, not even hominins, which are the most gregarious members of the group. More probable provenance lies in the upper Sangiran or the lower Bapang formations. Either alternative would associate the specimen with other catarrhine fossils in more tenable Pleistocene environments. We also unravel errors and inconsistencies in the contextual report and in the discussion of dome geochronology. The various radiometric, paleomagnetic, and paleontologic studies cited show a discordance of about 300 Ka (thousand years) across the lithostratigraphic sequence. Plio-Pleistocene biogeographic hypotheses for Java must work with short and long chronologies.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Author keywords” size=”size-sm” text_align=”text-left”][vc_column_text][/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Indexed keywords” size=”size-sm” text_align=”text-left”][vc_column_text]Catarrhine biogeography,Java,Plio-Pleistocene,Radiometric dating,Tephrostratigraphy[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”Funding details” size=”size-sm” text_align=”text-left”][vc_column_text]This review reflects collaboration between the Department of Geology, Institute of Technology Bandung (ITB) and the Department of Anthropology, University of Iowa (UI). At ITB, we receive support from Dr. I. G. Widiadnyana Merati, Vice President for Academic Affairs, and Dr. Pudjo Sukarno, Dean of Faculty of Mineral Technology. We are also aided by the Geological Research and Development Centre, Bandung, Mr. Bambang Dwiyanto MSc, Head; and the National Archaeological Research Centre, Jakarta, Dr. Haris Sukendar, Head. Field research permits 7450/V3/KS/ 1998 and 3174/V3/KS/1999 were issued by the Indonesian Institute of Sciences (Lembaga Ilmu Pengetahuan Indonesia), Jakarta. Three organizations funded fieldwork: the UI Center for Global and Regional Environmental Change, Dr. Gregory Carmichael and Dr. Jerry Schnoor, Directors; the UI Central Investment Fund for Research Enhancement, Dr. David J. Skorton, Vice President of Research; and the Human Evolution Research Fund, University of Iowa Foundation.40Ar/39Ar analyses were provided by the New Mexico Geochronological Research Laboratory, Socorro, NM, Dr. Matthew Heizler, Co-Director. In the field, we enjoyed assistance from Dr. Johan Arif and Dr. Sujatmiko. Our illustrations were drawn with the efforts of Ms. Shirley Taylor and Ms. Nancy Zear, UI Medical Photography, and Mr. Joe Artz, Office of the State Archaeologist, UI. Ms. Kate Dernbach edited the manuscript. Finally, we acknowledge kind assistance from Drs. Luis Gonzalez, Etty Indriati, Teuku Jacob, Mark Reagan, Truman Siman-juntak, and Harry Widianto.[/vc_column_text][vc_empty_space][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][vc_empty_space][megatron_heading title=”DOI” size=”size-sm” text_align=”text-left”][vc_column_text]https://doi.org/10.1023/A:1005525623327[/vc_column_text][/vc_column_inner][vc_column_inner width=”1/4″][vc_column_text]Widget Plumx[/vc_column_text][/vc_column_inner][/vc_row_inner][/vc_column][/vc_row][vc_row][vc_column][vc_separator css=”.vc_custom_1624528584150{padding-top: 25px !important;padding-bottom: 25px !important;}”][/vc_column][/vc_row]