Pulau Kapas
Pulau Kapas (“Kapas Island”) is an island located in the south china sea. It is 6km away from the coast of Marang in the state of Terengganu, Malaysia. It is famous for its beautiful beaches, hikes and diving spots.
Transpression Deformation
Transpression is a type of strike-slip fault deformation with a simultaneous component of shortening perpendicular to the fault plane that results in an oblique shear. We can describe the oblique shear based on the direction the shear is “leaning” towards, e.g. north verging folds.
Pulau Kapas has suffered two successive dextral transpressive deformation episodes. The lack of fossil evidence made dating the episodes near impossible. The proximity of both episodes leads to the development of a dextral strike-slip basin in the southern part of the island. The basin is where the Kapas Conglomerate was deposited. A conglomerate is a collection of small stones/sediments that had been fused together.
The evidence for the two transpressive deformation and the basin can be observed if you hike along the southern part of the island. The deformation changes can be seen by paying attention to the direction of the fault lines within the surface.
Getting here
The island can be reached by taking a 15-minute boat ride from the Marang Jetty.
Claiming this EarthCache
Provide me with the following:
- At the GPS location, describe the oblique shear you see in front of you.
- Is the oblique shear seen here man-made or natural?
- Provide a photo of yourself or a personal item at the GPS location.
References
https://en.wikipedia.org/wiki/Transpression
https://gsm.org.my/wp-content/uploads/gsm_file_2/702001-100642-PDF.pdf
DT 5 due to boat ride.