Nelson Kloni
Quarry site investigation at Bt Balai Nyabong, Mile 14 1/2 Lubok Antu Road GSKL 017/226 Nelson Kloni - 1980 - 1 v.(various pagings) ill. 30 cm
The chert is weathered on the surface. The weathered rock appears brownish or dark grey due to iron oxide staining. The fresh rock is grey to purplish and hard
Quarries and quarrying--Sarawak
Quarry site investigation at Bt Balai Nyabong, Mile 14 1/2 Lubok Antu Road GSKL 017/226 Nelson Kloni - 1980 - 1 v.(various pagings) ill. 30 cm
The chert is weathered on the surface. The weathered rock appears brownish or dark grey due to iron oxide staining. The fresh rock is grey to purplish and hard
Quarries and quarrying--Sarawak