Geography in Palawan - Philippines
The northeastern part of Palawan originally came from China. It is the visible part of a continent that floated away through the South China sea. This continent also composes the northern part of Palawan in the Reed Bank area of the southern portion of the South China Sea. Some of the oldest geographical rock formations of the country are found in the northeastern portion of Palawan.
Palawans southwestern area features ophiliotic rocks or rocks coming from the oceans crust. This type of rock had been thrust upward due to continental shifting. On the eastern part of Ulugan Bay, where Dalrymple Point is located, is a clear evidence that the ophiolite has been pushed on to the clastic rocks.
Different rock examples in the continental northeastern part of Palawan include mudstones and clastic rocks. These types of rocks can be seen on the road leading to the southeastern coast of Puerto Princesa all the way to Malampaya. These rocks formed the shelf on the southeastern part of China before drifting to the open sea.
Around the Malampaya area up to El Nido, visitors can find marine limestones. Based on the composition of these sedimentary rocks, it is widely believed that they had formed a portion of a prism on the southeastern portion of mainland China when that part of the country was part of an Andean plate margin. The limestones and cherts were cut off from a plate that drifted to China. Some of the limestones in the area are also classified as olitostromal or they had been created in shallow water but drifted to deeper water due to submarine shifting.
Coron Island, which is located in the northern part of Palawan is surrounded by big rock like island formations. It is important to remember that the famous limestone formations in St. Paul and El Nido are of different age and beginning. The limestones in St. Paul Park, which is located in the eastern part of Uligan Bay are young. Based on their composition, they had originated from the Miocene age (fifteen to thirty million years ago).
These limestone variations formed as reef formations on the continent crust that floated away from China. Aside from that, these are the limestones that harbored most of the gas and oil deposit that is being harvested offshore. The limestones in El Nido are two hundred fifty to three hundred years old. They are the same age as the limestones that can be found in China and Vietnam.
The rocks that can be found in the central part of Palawan and the northern part of Palawan are granite rocks that are thirteen to fifteen million years old based on monazite and zircon study. Basaltic rocks in Taytay are a good indication of magma activity in the area. It is a part of what has been widely recognized as South China sea magma activity that had severely affected different areas around the sea.
Hydrothermal occurrence and mineralization in Puerto Princesa is another good indicator of magma activity. But surprisingly, the province rarely experience tremors due to movement of magma compared to the different parts of Philippines. So the next time that you are in Palawan, you are now more familiar with the different rock formations that you can see in the province. Knowing the origins of Palawan will allow you to appreciate the experience more and you are not simply a visitor who knows nothing of the province.