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Landscape development preceding Homo erectus immigration into Central Java, Indonesia: The Sangiran Formation Lower Lahar
Bettis III E.A.a, Zaim Y.b, Larick R.R.a, Ciochon R.L.a, Sumintoc, Rizal Y.b, Reagan M.a, Heizler M.d
a Department of Geoscience, University of Iowa, 121 Trowbridge Hall, United States
b Department of Geology, Institute of Technology Bandung, Indonesia
c Geol. R. and D. Centre, Indonesia
d New Mex. Bur. Geol. Mineral Rsrc., United States
[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]The Sangiran Dome is the primary stratigraphic window for the Solo Basin, a coastal feature on the Pliocene-Pleistocene Sunda subcontinent south margin. In the Dome, the Lower Lahar unit (LLU) is a lahar-type debris flow overlying near-shore marine sediments. The event that emplaced the LLU likely originated from sector collapse on a neighboring volcanic edifice. Freshwater mollusc fossils in the LLU indicate that swamps or shallow lakes lay between the edifice and the current Dome area. 40Ar/39Ar analyses on hornblende separates from six pumice lenses suggest that the LLU was deposited as early as 1.90±0.02 Ma. The event resulting in deposition of the LLU transformed late Pliocene near-shore marine environments into estuarine and marsh settings. Shortly thereafter, glacioeustatic sea level falls completed the local transition to fully terrestrial environments that attracted Homo erectus to southernmost Sunda in the Early Pleistocene. © 2004 Elsevier B.V. All rights reserved.[/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]40Ar/39Ar step-heating,Homo erectus,Lahar,Solo basin,Sunda[/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]The Institute of Technology Bandung and the University of Iowa (UI) collaborated in this research, with assistance from the Indonesian Geological Research and Development Centre and the National Archaeological Research Centre. The Indonesian Institute of Sciences issued research permits 7450/V3/KS/1998, 3174/V3/KS/1999 and 4301/1.3/KS/2001. Funding was provided by the following UI programs: Center for Global and Regional Environmental Research, Central Investment Fund for Research Enhancement, Office of the Vice-President for Research, the Office of the Dean of the College of Liberal Arts and Sciences, and the Human Evolution Research Fund at the UI Foundation. Johan Arif and Sujatmiko aided in fieldwork. Computer graphics and other digital images were produced by Rubén Uribe and Shirley Taylor, and updated by K. Lindsay Eaves-Johnson. K. Lindsay Eaves-Johnson proofread the manuscript. The manuscript was improved by thoughtful comments of two anonymous reviewers and Finn Surlyk.[/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/10.1016/j.palaeo.2004.01.016[/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]