Sarawak can be divided into two geological zones: the Sunda Shield, which extends southwest from the Batang Lupar River (near Sri Aman) and forms the southern tip of Sarawak, and the geosyncline region, which extends northeast to the Batang Lupar River, forming the central and northern regions of Sarawak.
Sarawak contains large tracts of tropical rainforest with abundant plant and animal species [REF].