4 Natural Hazards Risk Assessment, Communication and Reduction Associated with Seismicity in the Rocky Mountain Region and Beyond

Monday, 19 May 2025
8:00 AM - 9:45 AM
Cascade AB

USING UPLIFTED CORAL TERRACES ELEVATION AND AGE TO RECONSTRUCT THE BIRTH OF THE BANDA RANGE, TIMOR REGION, SE ASIA

Paper number: 4-3
Program: Theme Sessions
Time: 8:30 AM – 8:45 AM

Authors

Abstract

Elevation and location of uplifted coral terraces in Timor help recreate the uplift pattern and history of one of Earth's youngest mountain ranges over the past 1 million years ago. The elevation and age data combined with uplift rates shows that the island started as a series of local, near circular uplifts in what is now the central part of the island exposing the deepest structural levels. These local uplifts at rates of up to 1.5 m/ka eventually merge into a long ridge that progressively lengthens and widens in a patchwork manner. The nature of the variability in uplift rates across Timor argues strongly against the slab tear hypothesis for uplift. Other potential explanations include subduction of differing amounts of material on the subducting plate and differing structure in the upper plate.

Geological Society of America Abstracts with Programs. Vol. 57, No. 5

doi: 10.1130/abs/2025RM-410315

© Copyright 2025 The Geological Society of America (GSA), all rights reserved. Permission is hereby granted to the author(s) of this abstract to reproduce and distribute it freely, for noncommercial purposes. Permission is hereby granted to any individual scientist to download a single copy of this electronic file and reproduce up to 20 paper copies for noncommercial purposes advancing science and education, including classroom use, providing all reproductions include the complete content shown here, including the author information. All other forms of reproduction and/or transmittal are prohibited without written permission from GSA Copyright Permissions.