Upper Oligocene–lower-Middle Miocene peramelemorphians from the Etadunna, Namba and Wipajiri formations of South Australia

2021 ◽  
pp. 1-17
Author(s):  
Kenny J. Travouillon ◽  
Robin M. D. Beck ◽  
Judd A. Case
Keyword(s):  
Middle Miocene ◽  
South Australia ◽  
Upper Oligocene

scholarly journals The Late Eocene – Recent <i>Bradleya johnsoni</i> Benson lineage (Crustacea, Ostracoda) in the Central Equatorial Pacific

1988 ◽  
Vol 7 (2) ◽  
pp. 187-199 ◽  
Author(s):  
P. Lewis Steineck ◽  
David Yozzo
Keyword(s):  
Middle Miocene ◽  
Late Eocene ◽  
Equatorial Pacific ◽  
General Increase ◽  
Reticular Pattern ◽  
Lower Oligocene ◽  
Upper Oligocene ◽  
Central Equatorial Pacific ◽  
Stratigraphic Ranges ◽  
Direct Ancestor

Abstract. Three stratigraphically successive species of Bradleya Hornibrook, 1952 from abyssal sediments of the central equatorial Pacific (Leg 85, Deep Sea Drilling Project) form an unbranching evolutionary sequence designated as the B. johnsoni Benson lineage. These taxa are B. sp. 1 (Lower Oligocene), B. johnsoni (Upper Oligocene – Middle Miocene) and B. thomasi n. sp. (Upper Miocene – Recent). A shared synapomorphic character, the posterior bridge complex, establishes the kinship of these species. Their stratigraphic ranges and a traceable series of changes in the organisation and mass of the reticulum are consistent with the hypothesis of direct ancestor/descendant relationships between them. Bradleya johnsoni is distinguished from B. sp. 1 by the appearance of new primary muri in the posteroventral region and by a general increase in reticular mass. In B. thomasi, the overall reticular pattern is maintained but it becomes more delicate and less rectilinear. Each species of this lineage shows similar variation in the posteroventral reticulum.

scholarly journals Geometry of Cauto-Guacanayabo basin, Cuba

Bionatura ◽  
2019 ◽  
Vol 02 (Bionatura Conference Serie) ◽  
Author(s):  
Yaniel Misael Vazquez Taset
Keyword(s):  
Middle Miocene ◽  
Middle Eocene ◽  
Strike Slip ◽  
Upper Eocene ◽  
San Luis ◽  
Upper Oligocene ◽  
New Knowledge ◽  
Eastern Cuba ◽  
The Relationship ◽  
Seismic Lines

The Cauto-Guacanayabo basin is located in the southern part of the Guacanayabo-Nipe tectonic corridor, Eastern Cuba, and records the evidence of the evolution of the Cuban Orogen. The objective of this work is to determine the geometry of the sedimentary infill of the basin, as well as the relationship between the units that constitute it. This study is based on the interpretation of several 2D seismic lines, geological data of surface and boreholes. Four tectonosequences have been defined (TSA, TSB, TSC, TSD) delimited by four regional unconformities in the basin (U-0, U-1, U-2, U-3). The TSA is formed by Charco Redondo, Puerto Boniato, Farallón Grande and San Luís formations, with ages from the middle Eocene to the upper Eocene. The Sevilla Arriba, Paso Real, Camazán and Güines formations constitute the TSB; its age varies between the upper Oligocene and the middle Miocene. The TSC covers a period of age between the middle Miocene and the lower Pliocene and is composed of the Cabo Cruz and Manzanillo formations. The TSD is formed by the Río Maya, Dátil, Bayamo, Cauto, Jaimanitas, Villarroja, Río Macío, and Jutia formations, and the informal stratigraphic unit Marga Demajagua. The age of this tectonosequence varies between the upper Pliocene and the Holocene. This study brings new knowledge about Cuban synorogenic strike-slip basins. In addition, it allows us to understand how the complexity and compartmentalization of the sedimentary infill of the basin are the results of the evolution of the Cauto-Nipe sinistral strike-slip fault.

Three Foraminiferal Zones in the Tertiary of Australia

1951 ◽  
Vol 88 (4) ◽  
pp. 273-283 ◽  
Author(s):  
M. F. Glaessner
Keyword(s):  
South Australia ◽  
Intermediate Zone ◽  
Upper Eocene ◽  
Lower Miocene ◽  
Upper Oligocene

AbstractThe paper draws attention to the existence in the Tertiary of Australia of three distinctive though not consecutive foraminiferal zones. The lowest zone, found in Victoria and South Australia, is of Upper Eocene age, the upper zone is not younger than Lower Miocene (Burdigalian) and the intermediate zone of Victoriella, corresponding to strata usually referred to the “Janjukian”, probably Upper Oligocene (Chattian) to Aquitanian.

Ceratodus diutinus, a new ceratodont from Cretaceous and Late Oligocene–Medial Miocene deposits in Australia

1993 ◽  
Vol 67 (5) ◽  
pp. 883-888 ◽  
Author(s):  
A. Kemp
Keyword(s):  
New Species ◽  
Middle Miocene ◽  
New South ◽  
South Australia ◽  
First Record ◽  
Late Oligocene ◽  
European Species ◽  
Australian Species ◽  
South Wales ◽  
A New Species

Ceratodus diutinus, a new species of ceratodont lungfish similar to but not identical with Ceratodus kaupi Agassiz, 1838–1844, is described from the Lower Cretaceous Griman Creek Formation at Grawan and Lightning Ridge in northern New South Wales, Australia, and the Toolebuc Formation at Canary Station near Boulia in western Queensland. The species also occurred in one Late Oligocene–Middle Miocene deposit at North Prospect, Lake Pinpa, South Australia (Namba Formation). This is the first record from Australia of a species of Ceratodus similar to the Triassic ceratodonts of Europe. The Australian species lasted much longer than the related European species, C. kaupi, which is restricted to Triassic deposits.

Macropodoids from the Middle Miocene Namba Formation, South Australia, and the homology of some dental structures in kangaroos

1986 ◽  
Vol 60 (2) ◽  
pp. 418-447 ◽  
Author(s):  
Tim Flannery ◽  
Thomas H. V. Rich
Keyword(s):  
Middle Miocene ◽  
South Australia ◽  
Local Fauna

Macropodoids from the Tarkarooloo local fauna, including Nambaroo tarrinyeri n. gen. and sp., N. saltavus n. sp., N. novus n. sp. and Palaeopotorous priscus n. gen. and sp., include the most plesiomorphic macropodids and potoroids known. Together with the newly discovered macropodoids from the Pinpa and Yanda local faunas they are also the oldest macropodoids described. Study of the morphology of these plesiomorphic macropodoids indicates that the trigonid of the M2 in potoroids and macropodids is composed of different structures (the protoconid and metaconid in macropodids and the protoconid and protostylid in potoroids). Also, the posterior cingulum in macropodids is a neomorphic structure, and not homologous with the posterior cingulum (the posthypocristid and postentocristid) in potoroids and phalangerids. A unique M2 trigonid configuration, where the cristid obliqua connects with the protostylid, is here recognized as being present in plesiomorphic macropodoids and phalangerids, and possibly represents a synapomorphy for a clade containing members of those groups.

scholarly journals Course of the lower River Murray in South Australia: effects of underprinting and neotectonics?

2009 ◽  
Vol 121 (2) ◽  
pp. 207 ◽  
Author(s):  
C.R. Twidale ◽  
J.A. Bourne
Keyword(s):  
Sea Level ◽  
Structural Control ◽  
Middle Miocene ◽  
Country Rock ◽  
South Australia ◽  
Valley Floor ◽  
Lower Section ◽  
Late Pliocene ◽  
North West ◽  
Late Tertiary

The change in direction of the River Murray from westerly to southerly at North West Bend has been attributed to faulting or warping, but no appropriate structure has been located in the country rock coincident with the river course. Yet the angularity and the straightness of major sectors argue structural control. The plan course of the Murray downstream from Morgan is attributed to underprinting from basement fractures following the Middle Miocene but prior to the Late Pliocene. Uplift of the Marmon Jabuk structure superimposed on the effects of underprinting accounts for major departures from the SSW trend downstream from North West Bend, as well as the impounding of Lake Bungunnia. The upper shallow section of the valley-in-valley form was shaped at a time of higher baselevel in the Middle-Late Tertiary. The lower section is the present Gorge. The valley floor was lowered probably by subterranean solution and flow followed by collapse of the cavern roofs. Regression of the River at times of lower sea level caused the breach of the Marmon Jabuk blockage and the draining of Lake Bungunnia.

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