People at Fort Hoofddijk

Richard Bakker
R.R. Bakker
MSc student 2011

Now at:
ETH Zürich
Geologisches Institut - NO E 21
Sonneggstrasse 5
8092 Zürich


Homepage at ETH


Research of Richard Bakker

Australia Down Under & Timor on Top: 
uplift rates of Earth's youngest orogen 
The islands which make up the Banda Arc, SE Asia are the result of back arc volcanism. However, one of the islands, Timor is not. The island is the result of the continental margin of Australia entering the subduction zone. Timor is therefore offers a unique opportunity to study the early stages of orogeny.
Richard has carried out fieldwork in the country of East Timor, together with Garrett Tate (PhD student) and Nadine McQuarrie (both Princeton University), professor Ron Harris (Brigham Young University) and Douwe van Hinsbergen (PGP, University of Oslo). On Timor Pliocene basins are present which have preserved the uplift history.

Angular unconformity ...
Richard, drilling in the river

The results will be used as a constraint to model the uplift. Different scenarios will be tested to explain the rapid uplift of the island of Timor. Richard's project will be supervised by Douwe van Hinsbergen, Wout Krijgsman and Jan-Willem Zachariasse

Simplified Geological map, from Harris, 2006.
The surface geology of the island of Timor mainly consists of duplexes of Australian shelf stratigraphy. Detailed mapping of these duplexes has been carried out by Garrett Tate, Nadine McQuarrie, Richard Bakker and others. Using paleomagnetism, a study will be conducted to find out if there is vertical axis rotation between the horses. The quantification of these relative rotations will provide a better estimate for the shortening factor between the Banda Arc units and the Australian shelf units.

Left: Typical outcrop of the Aitutu Limestone formation. Right: Mario Amaral (Universitas Teknologi Yogyakarta) drilling cores from this formation.
Douwe van Hinsbergen drilling.
One of the Australian shelf formations is the Maubisse Limestone. This formation has a very abundant fossil record. This indicates a shallow marine, warm environment. The Maubisse formation is the time equivalent of the Permian. During the Permian the Indo-Australian plate was situated on the south pole. A paleomagnetic study is carried out to determine the paleolatitude of the Maubisse Limestone formation. 
The results may provide a test for the hypothesis of True Polar Wander.

Left: Typical outcrop of the Maubisse Limestone formation.   Right: Crionid fossil, compass for scale.

publications Publications of Richard Bakker

Conference Abstracts

  • Tate, G., McQuarrie, N, Bakker, R.R., van Hinsbergen, D.J.J., and Harris, R.A. (2010). Active Arc-Continent Accretion in Timor-Leste: New Structural mapping and quantification of Continental Subduction.  Abstract T51A1996T presented at 2010 Fall Meeting, AGU, San Francisco, Calif., 13-17 Dec.