The Geology of the Miri Airport Road Outcrop
The Miri Airport Road outcrop is presented on your PC through a wealth of drawings, maps and 3-dimensional diagrams, high resolution pictures and full-circle panoramas.
Interactive animations show how the various types of faults form. The 19 panoramas allow an exploration of virtually all corners of the outcrop.
Step by step, picture by picture, the path of some 20 faults can be followed throughout the outcrop. A specially drafted 3-dimensional diagram shows the location of all pictures.
The dynamics of the faults is brought to life through an animation which shows the deposition of the sediments, and their subsequent faulting in a complex series of blocks. The end animation blends into a picture of the outcrop, powerfully demonstrating the evolution of the faults which dissect the rocks. A comprehensive library of annotated pictures illustrates many of the deformation features that can be studied in the outcrop. It is complemented by a rich set of photographs showing general views, rock types, sedimentary structures, trace fossils and diagenetic features.
Why is there an interest in this outcrop?
The Miri Airport Road outcrop exposes a series of faults, which can be followed uninterruptedly over a large distance, along vertical and horizontal surfaces. Outcrops such as this are rare, where a 3-dimensional view of the faults can be obtained.
The interesting thing about geological faults
Faults compartmentalize the rocks into discrete blocks. Petroleum geologists need to map the fault blocks, to understand the distribution of the oil and gas deposits. In the subsurface, faults can act as seals, trapping the fluids within fault blocks. The Miri oil field consists of a large number of fault blocks, similar to the ones exposed along the Airport Road. Therefore, this outcrop provides an excellent analogue to help us understand the subsurface geology of the Miri Oil Field. The structural geologist studies the faults in order to understand how and why the rocks fracture. With that information, it is possible to reconstruct the history of the Earth throughout the geological eons, and explain the mechanisms responsible for the formation of mountains.
What will you find in the CD?
This CD contains a rich collection of unpublished data, presented to you in a novel and interactive way that will allow you to feel you're virtually there at the outcrop. By combining immersive 360 degree panoramas on a 3-dimensional model with hundreds of high resolution pictures, you can explore and study the site in detail from the convenience of your pc. The pictures, all with brief descriptions, are organised into the following categories
GENERAL VIEWS, DEFORMATION FEATURES, FAULTS, SEDIMENTARY FEATURES (Including TRACE FOSSILS and DIAGENESIS). A series of animated diagrams show basic fault displacements. A dynamic model reconstructs the history of the main quarry face; it shows the deposition of sediments, and the subsequent developments of faults and their movements. The model blends with a picture of the outcrop, showing the relationship between the model and the exposed rocks.
The introductory section defines the scope of the CD and allows access to Basic Fault Dynamics animations, illustrating the main types of geological faults. The Geological Overview introduces the main elements of the regional geology around Miri. Short animated paleo -geographic sequences show how the coastline shifted since the last 27 million years. The topography, the different rock formations and the major fault structures are also discussed and illustrated. This introductory section provides a framework to understand the detailed descriptions, which are covered in the subsequent chapters.
Further understanding of the Miri Airport Road outcrop and its origins are provided by this section on the reconstruction of the layers and faults (Palinspastic Reconstruction) and what is interpreted to have happened throughout the millions of years that they took to form.
Using the power of Apple Corporation’s Quicktime VR Technology, these Panoramas enable you to look around you and to zoom in and out of areas of interest in these immersive pictures. The set of 19 panoramas give you a virtual tour of the outcrop, allowing you to develop a 3-dimensional perspective that is so important in geological studies. The section on Geological Faults provides an extensive photo coverage of the faults (geological breaks in the ground) seen at this outcrop. With over 200 high resolution photographs, you will be able to explore these faults in detail. In the example shown here, clicking on one of the numbered boxes on the left screen opens the respective picture. Each of the 20 faults described has its own set of pictures.
Trace fossils and various types of deformation & diagenetic structures are covered in these 2 sections on Sedimentary and Deformation Features. Examples of sedimentary features include Lithotypes, Sedimentary Structures, Trace Fossils and Diagenesis. Deformation structures include Fault Ends, Fault Bends, Riedels, Lenses, Fault Gauge, Drag, Clay Smear, Deformation Bands and Joints.
All pictures on the cd-rom come in a normal, fit-to-window mode (left picture) as well as a maximised mode (right picture) which is 2048x1536 pixels in size. This gives great detail in the pictures and is Ideal for studying the geological features seen.
Some of the many geological pictures that are available on the CD. Each picture comes with a short description of the feature observed.