Intensive,modern exploration of the north Sumatra Dasin has emhasized the need for revision and refinement of fermer rock strategraphic conceots and nomenclature, particulary of the transgresive pre-Baong sediment.
Intensive, modern exploration of the North Sumatra Basin has empahasized the need for revison and refinement of former rock stratigraphic concepts and nomenclature, particularly of the transgressive pre-Baong sediments.