Some Palaeozoic‐Mesozoic stratigraphic‐structural relationships in east timor and their significance in the tectonics of timor

Tectonics of the Indonesian region

“…Crostella and Powell (1976, p. 154-155) stated that structures conjectured by Audley-Charles to be broad, simple, and autochthonous "have been found in the field to be chaotically folded and faulted, virtually reduced to one limb-or at best strongly asymmetric, with the southern flank sub-vertical and many associated minor reverse faults developed***all pre-Upper Miocene sediments outcropping on Timor and the adjacent islands are allochthonous." Brunnschweiler (1978), Grady (1975), and Grady and Berry (1977) documented major errors in Audley-Charles' mapping and field interpretations.…”

“…The Timor limestone fauna is subtropical, not tropical; it contains fusulinids and rugose corals, for example, but not reef limestones nor the extremely diverse assemblages to be expected of the tropics. The limestone faunas show their closest taxonomic affinities to the faunas of northern India (where glacial and temperate Permian rocks are also present lower in the section) and of northwestern Australia, despite the facies contrast (Teichert, 1972;Waterhouse, 1972 Grady (1975) and Grady and Berry (1977), clastic Triassic strata with Australian faunas lie with depositional contact upon the warm-water Permian limestone, which is intercalated with colder water Permian clastic strata, in central Timor and were mismapped by Audley-Charles (1968). Paleomagnetic latitude of the clastic Permian is the same as that of red shale interbedded with the carbonate Permian (Chamalaun, 1977a, b).…”

“…F. Berry and A. E. Grady Grady and Berry, 1977;oral and written communs., 1977) studied the metamorphic rocks that extend for about 10 km southward from the north coast of Timor between long 125°31' and 126°00' E. Pelitic and quartzose schists, and locally calcareous and mafic rocks, show a metamorphic progression northward and eastward from chlorite through biotite, hornblende, garnet, oligoclase, staurolite, clinopyroxene, and sillimanite-potassium feldspar zones. Hornblende and biotite in amphibolite have K-Ar ages of 5-16 m.y.…”

Carbonate pelagites in the post-Gondwana succession (Cretaceous – Neogene) of East Timor

“…South of the Aitutu Formation and south of the study area, the Wai Luli Formation, given a Late Triassic to Early -Middle Jurassic age, was mapped as the youngest unit in the anticline. Grady and Berry (1977) mapped the sampled area as undifferentiated Permian -Mesozoic. In contrast to the previous authors, Brunnschweiler (1978) recorded large occurrences of carbonate pelagites between Cribas and Baulaca.…”

A latest Carboniferous warming spike recorded by a fusulinid-rich bioherm in Timor Leste: Implications for East Gondwana deglaciation

“…As well as Maubisse Formation strata this belt is now recognized as also including other units, for example outcrops better assigned to the Atahoc and Cribas Formations as well as to the Triassic Aitutu Formation (Grady and Berry, 1977; Hunter, in an unpublished thesis cited in Charlton et al, 2002;and unpublished work by the present authors). The association of Permian lithofacies in the region suggests that the carbonate-dominated and volcanic-dominated units (characterised by Audley-Charles, 1968, as the Maubisse Formation) interdigitate with siliciclastic units best placed in the Atahoc and Cribas Formations as also suggested by Grady and Berry (1977) in East Timor and by Barkham in West Timor (in an unpublished thesis noted by Charlton et al, 2002). Contrary to the schematic stratigraphic chart of Charlton et al (2002, fig. 3), there is no continuous limestone succession through the Permian in Timor.…”