Malcolm W. Wallace
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View article: The palaeoenvironmental and biological significance of marine carbonate depositional surfaces
The palaeoenvironmental and biological significance of marine carbonate depositional surfaces Open
Carbonate rocks form a substantial part of the ancient geological record, yet their reliability as archives of past environments and ecosystems has been questioned because of diagenetic alteration. This review investigates the potential of…
View article: An earliest Ediacaran oxygenation episode in the Wilpena Group, Adelaide Superbasin, South Australia
An earliest Ediacaran oxygenation episode in the Wilpena Group, Adelaide Superbasin, South Australia Open
The first appearance of animals during the Ediacaran is arguably related to an increase in oceanic oxygenation during this time. However, there is considerable ambiguity in the global record of Ediacaran oxygenation, making it difficult to…
View article: Persistent late Tonian shallow marine anoxia and euxinia
Persistent late Tonian shallow marine anoxia and euxinia Open
The increase in the complexity of eukaryotic life during the Tonian Period (ca. 1000 to 720 Ma) is commonly associated with the oxygenation of the Earth's ocean–atmosphere system, yet the timing and duration of these redox changes remain u…
View article: Sedimentology and diagenesis of Upper Devonian carbonates, Canning Basin, Western Australia
Sedimentology and diagenesis of Upper Devonian carbonates, Canning Basin, Western Australia Open
Two Upper Devonian carbonate sequences in the Canning Basin were investigated: a) an outcropping sequence in the Geikie Gorge region on the Lennard Shelf; and b) a subsurface sequence on the Barbwire Terrace. The outcropping Frasnian-Famen…
View article: Tectonic-fluid evolution of an ultra-deep carbonate reservoir in the southern Halahatang Oilfield area, Tarim Basin, NW China
Tectonic-fluid evolution of an ultra-deep carbonate reservoir in the southern Halahatang Oilfield area, Tarim Basin, NW China Open
Several giant oilfileds have been discovered during recent exploration in the Ordovician carbonates in zone between the Awati and Manjiaer depressions, Tarim Basin, China. These oilfields are deeply buried (>7000 m), and most productive we…
View article: Shoreline evolution from the Late Cretaceous to the Miocene: A record of eustasy, tectonics and palaeoceanography in the Gippsland Basin
Shoreline evolution from the Late Cretaceous to the Miocene: A record of eustasy, tectonics and palaeoceanography in the Gippsland Basin Open
Well‐developed clastic shoreline systems have been deposited in the Gippsland Basin over a 70 Ma period, from the latest Cretaceous to the present day. Twenty‐three stacked coastal units have been mapped and described in the Traralgon and …
View article: New multicellular marine macroalgae from the early Tonian of northwestern Canada
New multicellular marine macroalgae from the early Tonian of northwestern Canada Open
Molecular phylogenetic data suggest that photosynthetic eukaryotes first evolved in freshwater environments in the early Proterozoic and diversified into marine environments by the Tonian Period, but early algal evolution is poorly reflect…
View article: Mekong River Basin Indicator Framework
Mekong River Basin Indicator Framework Open
The Mekong River Basin Indicator Framework provides a consistent and streamlined approach to data collection, analysis and reporting, to help alert Member Countries to the key issues and trends and identify areas for further investigation …
View article: Subglacial meltwater supported aerobic marine habitats during Snowball Earth
Subglacial meltwater supported aerobic marine habitats during Snowball Earth Open
Significance The “Snowball Earth” ice ages featured global ice sheets for millions of years, leading to oceanic anoxia and threatening the perseverance of aerobic life on Earth. Crucially, aerobic eukaryotes survived, possibly including ea…
View article: A fine balance: Accommodation dominated control of contemporaneous cool‐carbonate shelf‐edge clinoforms and tropical reef‐margin trajectories, North Carnarvon Basin, Northwestern Australia
A fine balance: Accommodation dominated control of contemporaneous cool‐carbonate shelf‐edge clinoforms and tropical reef‐margin trajectories, North Carnarvon Basin, Northwestern Australia Open
The concurrent development of a cool‐carbonate Miocene clinoform system and the tropical reef which developed on its shelf in the North Carnarvon Basin is studied. The study, based on seismic interpretation and geometrical analysis, seeks …
View article: Data for: Evidence of fire in Australian Cenozoic rainforests
Data for: Evidence of fire in Australian Cenozoic rainforests Open
Colourimetry, palynology and charcoal data associated with 'Evidence of early fire adaption in Australian Cenozoic rainforests'
View article: Glacio-marine iron formation deposition in a c. 700 Ma glaciated margin: insights from the Chuos Formation, Namibia
Glacio-marine iron formation deposition in a c. 700 Ma glaciated margin: insights from the Chuos Formation, Namibia Open
Full set of geochemical data.
View article: Data for: Neoproterozoic marine carbonates and their paleoceanographic significance
Data for: Neoproterozoic marine carbonates and their paleoceanographic significance Open
Data table and Supplementary data tables for Precambrian carbonate mineralogy
View article: Data for: Oligo-Miocene peatland ecosystems of the Gippsland Basin and modern analogues
Data for: Oligo-Miocene peatland ecosystems of the Gippsland Basin and modern analogues Open
Data for: Oligo-Miocene peatland ecosystems of the Gippsland Basin and modern analogues
View article: Marine cements reveal the structure of an anoxic, ferruginous Neoproterozoic ocean
Marine cements reveal the structure of an anoxic, ferruginous Neoproterozoic ocean Open
Neoproterozoic oceans provided the setting for the rise of animals, yet little is known of their chemical composition. Marine carbonates from the Cryogenian Oodnaminta Reef Complex, South Australia, reveal the chemical structure of a Neopr…
View article: IODP Expedition 356: Drilling to reveal a 5 million year carbonate and subsidence history on the Northwest Shelf of Australia
IODP Expedition 356: Drilling to reveal a 5 million year carbonate and subsidence history on the Northwest Shelf of Australia Open
The late Cenozoic carbonates of the Northwest Shelf are important subsidence history archives that also cause significant sonic velocity problems affecting seismic imaging of underlying strata. Despite their substantial thickness and areal…
View article: The value of a combined approach: Innovative mineral exploration techniques in the Irish Zn-Pb orefield
The value of a combined approach: Innovative mineral exploration techniques in the Irish Zn-Pb orefield Open
The Early Carboniferous stratigraphy of the Irish Midlands contains one of the world’s major carbonate-hosted zinc-lead orefields covering a region of approximately 8000 km2. The large-scale nature of the sedimentary fluid flow systems tha…