Shallow stratigraphy and structure of the Australian continental margin beneath the Timor Sea

摘要: Abstract Shallow seismic sections from the 1967 B.M.R. marine geophysical survey of Timor Sea were made with a Spark-array source and Subot Hydrostreamer receiver along 4,500 miles traverse across outer shelf upper slope Sea. These interpreted in terms stratigraphical section penetrated Ashmore Reef No. 1 Well. The chief region-wide feature is Late Miocene to Early Pliocene unconformity, which probably extends through series down-faulted blocks into Trough, consequently dated as no older than Miocene. Following uplift, erosion, downfaulting Trough Miocene, deposits, presumably carbonates, bypassed build out over subsiding edge uppermost maximum thickness 2,000 ft., coral reefs developed on structural hinges anticlines. Long-continued growth structures present day shown by variations sediments axes an antecedent valley cut anticline. has subsided at least 2,400 ft. since Miocene; prograding sediment layers southwest part area accumulated rate 0.14 ft . 1,000 years ( 4 cm ) vertically, 17 5 m horizontally.