Tag

plate tectonics

43 posts

• 10 July 2026The 825-Million-Year-Old Rift That Failed But Built a WorldA failed 825-million-year-old rift left a 650-kilometre volcanic chain and sedimentary basin in South Australia that preserved the Ediacaran fossils and still shapes the landscape today.
• 09 July 2026The 400-Million-Year-Old Volcanic Arcs That Built a Continent's EdgeThe Lachlan Fold Belt is the largest accretionary orogen on Earth, a 400-million-year-old jumble of volcanic arcs and seafloor sediments that built the eastern third of Australia.
• 08 July 2026The 1.8-Billion-Year-Old River That Left Its Pulse in StoneIn the Northern Territory, 1.8-billion-year-old river sediments in the Roper Group preserve the oldest known meandering river channels on Earth—bends frozen in sandstone that record how water moved be
• 08 July 2026The 520-Million-Year-Old Trench That Still Holds a Continent TogetherHow the 520-million-year-old Kanmantoo Trench off South Australia—a subduction zone that jammed—stitched the Australian continent together and left a belt of metamorphic rock still exposed today.
• 06 July 2026The 180-Million-Year-Old Spine That Gondwana Left BehindTasmania's 180-million-year-old dolerite ridge is the frozen belly of a Jurassic volcano, exposed by erosion as hexagonal columns that record Gondwana's failed breakup.
• 06 July 2026The 1.6-Billion-Year-Old Snot That Built a MountainIn central Australia's Strangways Range, 1.6-billion-year-old microbial mats—built by bacteria in a stagnant sea—were buried, heated, and folded into a mountain belt that still carries their chemical
• 05 July 2026The 1.1-Billion-Year-Old Lake That Boiled the CrustHow a 1.1-billion-year-old mantle plume beneath central Australia melted the continent's crust into a 25,000-square-kilometre granite plain—the Musgrave Province—and left a record of failed rifting th
• 04 July 2026The 650-Million-Year-Old Glass That Still Holds the Rift's ShapeHow 650-million-year-old volcanic glass in South Australia's Gairdner Ranges preserves the moment a continent tried to tear apart—and failed.
• 27 June 2026The 500-Million-Year-Old Sea That Became a Salt CathedralHow 500-million-year-old evaporite deposits beneath South Australia's Flinders Ranges formed the world's largest salt diapir province, pushing ancient salt through younger rock like a ghost rising thr
• 26 June 2026The 3.6-Billion-Year-Old Crust That Refuses to SinkHow the ancient Pilbara Craton's buoyant granite domes kept it from being recycled into the mantle, preserving Earth's earliest continental crust.
• 26 June 2026The 1.8-Billion-Year-Old Rift That Bent a ContinentHow 1.8-billion-year-old tectonic forces in the Mount Isa region created the world's richest silver-lead-zinc deposit—a 1,000-kilometre scar where a failed rift preserved metal in ancient seafloor mud
• 25 June 2026The 1.2-Billion-Year-Old Magma That Split a SupercontinentHow 1.2-billion-year-old volcanic dykes across Western Australia's Gascoyne region record the failed breakup of the supercontinent Rodinia, leaving a 1,000-kilometre scar of ancient magma.
• 24 June 2026The 290-Million-Year-Old Cliff of Rust: Tasmania's Permian Red BedsTasmania's Permian red beds record the only known time a continent drifted over the South Pole while surrounded by ice, preserving fossilised polar seafloors and glacial dropstones in rust-stained roc
• 20 June 2026The 165-Million-Year-Old Scar That Split a Continent: Western Australia's Wallowa Craton MarginHow a 165-million-year-old failed rift along Western Australia's Wallowa craton margin records the moment Antarctica tore away from Australia, leaving a 1,000-kilometre scar of ancient lava and broken
• 20 June 2026The Ice That Dragged a Continent Flat: Western Australia's Yilgarn Craton and the Permian Glacial PavementsHow 300-million-year-old ice sheets scoured Western Australia's Yilgarn Craton, leaving polished rock surfaces and glacial striations that record a time when Australia sat at the South Pole.
• 20 June 2026The Zircon That Survived 4.4 Billion Years: Western Australia's Jack HillsHow 4.4-billion-year-old zircon crystals from Western Australia's Jack Hills—the oldest known Earth material—reveal that a cool, wet crust existed within 150 million years of the planet's formation.
• 19 June 2026The Fault That Stitched a Continent Together: Western Australia's Darling FaultHow the 1,000-kilometre Darling Fault in Western Australia, active for over 2.5 billion years, records the collision that assembled the Australian continent.
• 18 June 2026The Crust That Recorded a Billion Years of Silence: South Australia's Gawler CratonHow South Australia's Gawler Craton, a 1.6-billion-year-old piece of continental crust, preserves the oldest known paleosol—a fossil soil that records Earth's early atmosphere before life changed it f
• 18 June 2026The Lava That Left a Diamond in the Sand: Western Australia's Argyle Lamproite PipeHow a 1.2-billion-year-old lamproite pipe in Western Australia's East Kimberley produced Earth's richest source of rare pink diamonds, recording a continent's journey over a deep mantle hotspot.
• 17 June 2026The Reef That Rose from a Drowned Continent: Western Australia's Ningaloo CoastHow a 250-kilometre fringing reef along Western Australia's Cape Range records the collision of the Indo-Australian plate and a 25-million-year history of coral growth on a drowned continental margin.
• 24 May 2026The Magma That Built a Mountain of Jade: Western Australia's Enderby Island NephriteHow 1.2-billion-year-old metamorphism in Western Australia's Enderby Island created one of the world's largest deposits of nephrite jade, recording a collision between two ancient continents.
• 24 May 2026The Magma That Forged a World of Green and Black: Tasmania's Serpentine HillsHow 500-million-year-old oceanic crust in Tasmania was thrust onto land, altered to serpentinite, and created a landscape of toxic soils, rare minerals, and the state's only nickel mine.
• 24 May 2026The Salt That Built a Mountain: South Australia's Lake Torrens DiapirHow 830-million-year-old salt deposits beneath Lake Torrens were forced upward through overlying rock by immense pressure, creating diapirs that shaped the Flinders Ranges.
• 23 May 2026The Pumice That Carried Life Across a Drowned Continent: Western Australia's Gascoyne SeamountsHow 70-million-year-old submarine volcanoes on the Gascoyne Seamounts, off Western Australia's coast, built isolated islands that became stepping stones for marine life across the rifting Indian Ocean
• 23 May 2026The Ash That Traced a Continent's Slow Drift: Queensland's Toowoomba BasaltHow 23-million-year-old basalt flows atop the Great Dividing Range in Queensland record Australia's northward drift and the birth of the modern Darling Downs.
• 22 May 2026The Lava That Left a Reef of Columns: Tasmania's Tasman Peninsula DoleriteHow Jurassic flood basalt in Tasmania cooled into the towering dolerite columns of the Tasman Peninsula—and what that tells us about the moment Gondwana began to crack apart.
• 21 May 2026The Magma That Blew a Hole in the Seafloor: Queensland's Mount WarningHow a 23-million-year-old volcanic shield in Queensland, now deeply eroded to its central plug, records the moment Australia rifted from Zealandia and a new continental margin was born.
• 21 May 2026The Magma That Left a Scar Across a Continent: Australia's Great Dyke SwarmsHow 2.4-billion-year-old giant dyke swarms across Australia record a failed attempt to split the continent, exposing deep crustal pathways through which magma surged.
• 21 May 2026The Magma That Forged a Diamond Cradle: Western Australia's Argyle Lamproite PipeHow a 1.2-billion-year-old volcanic lamproite pipe in Western Australia's Kimberley region produced the world's richest source of rare pink diamonds, driven by a collision of continents.
• 20 May 2026The Magma That Spawned a Goldfield: Victoria's Stawell ZoneHow 450-million-year-old volcanic rocks and deep-crustal faults in western Victoria generated one of Australia's richest gold deposits, where quartz veins still yield nuggets today.
• 20 May 2026The Fault That Built a Continent: Western Australia's Darling FaultHow the 1,000-kilometre Darling Fault in Western Australia, active since the Archean, shaped the continent's western margin and exposed 2.5-billion-year-old rocks at the surface.
• 20 May 2026The Lava That Tore a Continent Apart: Tasmania's Jurassic DoleriteHow a Jurassic flood-basalt event in Tasmania left behind the Organ Pipes and exposed the moment Gondwana began to break apart.
• 19 May 2026The Crust That Remembers Its Birth: Western Australia's Pilbara CratonHow the 3.5-billion-year-old Pilbara Craton in Western Australia preserves Earth's earliest continental crust, with greenstone belts and granite domes that record how the first landmasses formed.
• 18 May 2026The Mountain That Split a Continent: Tasmania's Tamar Valley RiftHow a failed Jurassic rift in Tasmania's Tamar Valley exposes the moment the supercontinent Gondwana began to tear apart, preserved in basalt flows and dolerite sills.
• 18 May 2026The Dune That Became a Mountain: Australia's Great Dividing RangeHow Australia's Great Dividing Range began not as a mountain-building collision but as a slow-motion rupture when the continent tried to tear itself apart 90 million years ago.
• 17 May 2026The Lava That Built a Diamond Mine: Western Australia's Argyle PipeHow a 1.2-billion-year-old volcanic pipe in the East Kimberley produced rare pink diamonds from ancient carbon deep beneath the Australian continent.
• 16 May 2026The Buried Rift That Split a Continent: Perth's Darling FaultThe Darling Fault in Western Australia records a 1.3-billion-year history from crustal fracture to escarpment, where ancient bedrock meets younger sediments along a 1,000-kilometre scar.
• 16 May 2026The Ice That Dug a Gulf: Spencer Gulf's Glacial OriginsSpencer Gulf in South Australia was carved 280 million years ago by Permian ice sheets that left a deep fjord-like valley later flooded by rising seas.
• 14 May 2026The Lava That Built a Continent: The Kalkarindji Large Igneous ProvinceThe Kalkarindji Large Igneous Province in northern Australia records a 510-million-year-old volcanic event that erupted 500,000 cubic kilometres of lava across a million square kilometres.
• 13 May 2026The Lava That Became a Shield: The Great Western Volcanic ProvinceVictoria's 4.5-million-year-old Western Volcanic Province contains over 400 eruption points that shaped the state's richest soils, creating the volcanic plains that underlie Melbourne's western suburb
• 13 May 2026The Diamond Gravels of Copeton: How Garnets Reveal a Lost ContinentBeneath NSW's Copeton dam, diamond-bearing gravels contain garnet crystals that match rocks under Antarctica, revealing a 300-million-year-old vanished landmass.
• 12 May 2026The Volcano That Built a Peninsula: The Bunyip Trap of VictoriaVictoria's Bunyip River valley preserves a 20-metre-thick lava flow from a 60-million-year-old fissure eruption that flooded river valleys and created the Mornington Peninsula's foundation.
• 12 May 2026The Volcano That Built a Reef: Lord Howe Island's Eroded ShieldLord Howe Island, a 7-million-year-old shield volcano remnant in the Tasman Sea, hosts the world's southernmost coral reef and records the slow collapse of a Pacific hot spot volcano.