Documenting vital tectonic remnants, basement formations, and ancient marine features that define Borneo's geological evolutionary timeline.
A complex assemblage of black chert, chert, serpentinite, phyllite, metabasalt, metagreywacke, chert blocks and fragments, alongside microdiorite. This mixture signifies post-collision extension offering crucial evidence of remnants from the Paleo-Pacific oceanic crust.
Consists of a mixture of large chert and serpentinite blocks, indicative of post-collision extension. This geological formation is significant as it provides vital evidence of remnants from the Paleo-Pacific oceanic crust, revealing the complex tectonic history and evolutionary processes following continental collision.
Characterised by its highly deformed and folded schist, phyllite, slate, and meta-sandstone due to the regional collision between the Sibumasu and Indochina blocks. These rocks serve as a crucial geological nucleus of Borneo, highlighting the beginning of the tectonic processes that shaped the island's formation.
The only location with fresh outcrop of basement rock of the Tuang Schist representing the basement rocks that are remnants of the Triassic Sundaland. These schists provide significant evidence of the region's ancient tectonic processes and sedimentary history, revealing insights into the Earth's evolution during the Triassic period.
A volcanic rock formation comprising andesite, dacite, trachyte, basalt, pyroclase, breccia, and tuff. This diverse composition represent the geological activity associated with the Cretaceous Paleo-Pacific volcanic arc, reflecting the region's dynamic volcanic history.
A significant geological formation representing the volcanic arc of the Cretaceous Paleo-Pacific subduction zone. This feature plays a crucial role in understanding the volcanic activity and tectonic processes that characterised the activities during the Paleo-Pacific subduction.
Signifies a pivotal geological event marking the end of Cretaceous Paleo-Pacific subduction. This unconformity delineates a distinct boundary between older marine deposits and younger terrestrial formations, highlighting the significant shifts in the region's tectonic and sedimentation processes.
Represent the accreted deep-sea sediments from the Paleo-Pacific Ocean, reflecting the complex mix of accreted terrane. These clastic sediments provide crucial insights into the marine depositional environments and tectonic activities associated with the ancient geological history of the region.
A key geological rocks formed during Triassic magmatism, directly linked to the collision between the Sibumasu and Indochina blocks. This event represents the larger igneous activities cut across Southeast Asia and end up at the SW Borneo. The only representative of Triassic igneous intrusion in Sarawak.
An accreted limestone blocks that originated from the shallow marine environment of the Paleo-Pacific Ocean. This formation provides valuable insights into ancient marine conditions and sedimentation processes, highlighting the geological evolution of the region prior to the Paleo-Pacific subduction.
