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GEOREF RECORD

Rapid Pliocene uplift of Timor

N. Nguyen, B. Duffy, J. Shulmeister and M. Quigley
Rapid Pliocene uplift of Timor
Geology (Boulder) (November 2012) 41 (2): 179-182

Abstract

Palynology of exhumed Pliocene marine turbidites and marl beds on the island of Timor provide insights into crustal deformation in the Indonesian region. Between ca. 4.5 and ca. 3 Ma, palynomorphs were sourced primarily from Australia and New Guinea, with increasing swamp and mangrove elements sourced from an emerging proto-Timor. Following ca. 3.1 Ma, pollen and charcoal evidence track the rapid uplift of Timor to a high island, with the progressive appearance of montane and dry, lee-side floristic elements. Early- to mid-Pliocene uplift rates of 0.5-0.6 mm yr (super -1) increased to 2-5 mm yr (super -1) in the latest Pliocene. The rapid topographic development of Timor-Leste initiated earlier but followed a pattern similar to that of more westerly localities in the Timor sector of the Banda Arc. Timor's emergence from the marine environment is closely correlated with the timing of closure of the Indonesian seaway to deep-dwelling foraminfera.


ISSN: 0091-7613
EISSN: 1943-2682
Coden: GLGYBA
Serial Title: Geology (Boulder)
Serial Volume: 41
Serial Issue: 2
Title: Rapid Pliocene uplift of Timor
Affiliation: University of Queensland, School of Geography, Planning and Environmental Management, Saint Lucia, Queensl., Australia
Pages: 179-182
Published: 20121113
Text Language: English
Publisher: Geological Society of America (GSA), Boulder, CO, United States
References: 31
Accession Number: 2013-007352
Categories: StratigraphyStructural geology
Document Type: Serial
Bibliographic Level: Analytic
Annotation: GSA Data Repository item 2013044
Illustration Description: illus. incl. geol. sketch map
S10°30'00" - S08°19'60", E123°34'60" - E127°30'00"
Secondary Affiliation: University of Canterbury, NZL, New Zealand
Country of Publication: United States
Secondary Affiliation: GeoRef, Copyright 2022, American Geosciences Institute. Reference includes data from GeoScienceWorld, Alexandria, VA, United States. Reference includes data supplied by the Geological Society of America, Boulder, CO, United States
Update Code: 201305
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