Paul D Stewart / Landscape of the Triassic coastal environment with reconstructions of dinosaurs and marine reptiles, 'Dr. Schubert's Naturgeschichte - Geologie, Mineralreich, Palaontologie'. Published in Stuttgart 18...

John Cancalosi / Fossil Keichousaurus (Keichousaurus hui, family Pachypluerosauridae), a lizard-like marine reptile from the Triassic Period. China

John Cancalosi / Cotham Marble / Landscape Marble, Rhaetian, uppermost Triassic stromatolitic limestone from the Penarth Group. Found in South Wales and Southwestern England, around Bristol, possibly extending to the...

Graham Eaton / Conglomerate at the unconformity between the Carboniferous limestone below and the Triassic sandstone above at Sully, near Cardiff, South Glamorgan, Wales, UK. September.

Graham Eaton / Triassic age Conglomerate and Sandstone, part of the Otter Sandstone Formation. The conglomerate pebbles mostly comprize quartz and quartzite reaching 20cm in diameter. Budleigh Salterton, Devon, UK,...

Matthew Maran / Triassic sandstone cliffs of East Devon, formed 250-260 million years ago and are the oldest on the Jurassic Coast World Heritage Site, Devon, England, UK, November 2016.

Matthew Maran / Triassic sandstone cliffs, East Devon were formed 250-260 million years ago, Jurassic Coast World Heritage Site, Devon, England, UK, November.

John Cancalosi / New red sandstone, cross-bedded sandstone, from the Triassic, Shropshire, England, UK, September.

Franco Banfi / Fossil and illustration of a Lizard fish (Saurichthys curionii) female eating a small male of the same species. The female probably choked while feeding, from the Middle Triassic period, Fossil Museum...

Franco Banfi / Model of Ticinosuco (Ticinosuchus ferox) from the Middle Triassic period, UNESCO World Heritage Site, Fossil Museum of Monte San Giorgio, Ticino, Switzerland.

Franco Banfi / Fossil of a Conifer (Voltzia sp.) branch from the Middle Triassic period, Fossil Museum of Monte San Giorgio, UNESCO World Heritage Site, Ticino, Switzerland.

Franco Banfi / Fossils of marine reptiles (Mixosaurus sp. and Shastasauride) from the Middle Triassic, Fossil Museum of Monte San Giorgio, UNESCO World Heritage Site, Ticino, Switzerland.

Franco Banfi / Fossil of a Rauisuchian archosaur (Ticinosuchus ferox) from the Middle Triassic, Fossil Museum of Monte San Giorgio, UNESCO World Heritage Site, Ticino, Switzerland.

Franco Banfi / Fossil of Bony fish (Archaeosemionotus sp.) from the Middle Triassic, Fossil Museum of Monte San Giorgio, UNESCO World Heritage Site, Ticino, Switzerland.

Franco Banfi / Imprint and model of Proarcestes extralabiatus from the Middle Triassic, Fossil Museum of Monte San Giorgio, UNESCO World Heritage Site, Ticino, Switzerland.

Franco Banfi / Close up of a fossil of a Conifer (Voltzia sp.) branch from the Middle Triassic period, Fossil Museum of Monte San Giorgio, Ticino, Switzerland.

Franco Banfi / Fossil of Neusticosaurus peyeri from sea floor, Middle Triassic, Fossil Museum of Monte San Giorgio, UNESCO World Heritage Site, Ticino, Switzerland.

Franco Banfi / Fossil of a Neusticosaurus peyeri skeleton, Middle Triassic, Fossil Museum of Monte San Giorgio, UNESCO World Heritage Site, Ticino, Switzerland.

Franco Banfi / Fossil of a Ceresiosaurus with several much smaller skeletons of Neusticosaurus. Fossil Museum of Monte San Giorgio, UNESCO World Heritage Site, Ticino, Switzerland.

Franco Banfi / Two marine reptile fossils (Mixosaurus sp). and (Shastasauride) from the Middle Triassic. Fossil Museum of Monte San Giorgio, UNESCO World Heritage Site, Ticino, Switzerland.

John Cancalosi / Leesburg Limestone Conglomerate close-up showing clasts from Frederick County, Maryland, USA. From Triassic Period.

John Cancalosi / Leesburg limestone conglomerate from Frederick County, Maryland, Formed in a Triassic period.

Will Watson / People looking at triassic New Red Sandstone cliffs of the Wilmslow Group, circa 250 million years old, Hawkstone Ridge, Hawkstone Follies, Shropshire, England, UK, May 2015.

Will Watson / Copper stained rock caused by mineralisation which forms malachite, Grinshill Sandstone, Triassic New Red Sandstone Formation, circa 250 million years old, Hawkstone Ridge, Hawkstone Follies, Shropshi...

Will Watson / Oak (Quercus robur) growing on Triassic New Red Sandstone cliff of the Grinshill Sandstone, circa 250 million years old, Hawkstone Ridge, Hawkstone Follies, Shropshire, England, UK, May.

Will Watson / Copper stained rock caused by mineralisation which forms malachite, Grinshill Sandstone, Triassic New Red Sandstone Formation, circa 250 million years old, Hawkstone Ridge, Hawkstone Follies, Shropshi...

John Cancalosi / Leesburg conglomerate rock, sedimentary polymictic conglomerate. Formed in the rift valley formed when the African plate split from the North American plate in the Triassic, found near Leesburg, Virgi...

John Cancalosi / Leesburg conglomerate rock, sedimentary polymictic conglomerate. Formed in the rift valley formed when the African plate split from the North American plate in the Triassic, found near Leesburg, Virgi...

John Cancalosi / Leesburg conglomerate rock, sedimentary polymictic conglomerate. Formed in the rift valley formed when the African plate split from the North American plate in the Triassic, found near Leesburg, Virgi...

John Cancalosi / Leesburg conglomerate rock, sedimentary polymictic conglomerate. Formed in the rift valley formed when the African plate split from the North American plate in the Triassic, found near Leesburg, Virgi...

Graham Eaton / Normal fault with grey Jurassic carbonates to the left and red Triassic mudrocks to the right, Blue Anchor, Somerset, February 2013.

Graham Eaton / Normal fault with grey Jurassic carbonates to the left and red Triassic mudrocks to the right, Blue Anchor, Somerset, February 2013.

Graham Eaton / Triassic age cliffs of Otter Sandstone and pebble beach, Jurassic Coast, Budleigh Salterton, Devon, March 2012

Adrian Davies / Fossil wood: Monkey Puzzle Tree (Araucaria sp.) of the Triassic, Madagascar. 248 million years old Polished section.

Kevin Schafer / Triassic sediments, eroded into cliffs, Hinlopen Strait, Svalbard, Norway 2010

John Cancalosi / Petrified trees (Araucarioxylon arizonicum) from the Triassic period 200-250 million years ago, Petrified forest National Park, Arizona, August 2010

John Cancalosi / Petrified trees (Araucarioxylon arizonicum) from the Triassic period 200-250 million years ago, Petrified forest National Park, Arizona, August 2010

John Cancalosi / Petrified trees (Araucarioxylon arizonicum) from the Triassic period 200-250 million years ago, Petrified forest National Park, Arizona, August 2010

David Woodfall / Dinosaur footprint in Triassic rocks. UK, October 2010

Kevin Schafer / Triassic sediments eroded into cliffs, Hinlopen Strait, Svalbard, Norway

Graham Eaton / Normal faults in Triassic Sandstone, Wirral, UK, May 2009

Graham Eaton / A normal fault in Triassic Sandstone, Wirral, UK, May 2009

Albert Lleal / Horseshoe Crab (Tarracolimulus rieki) fossil from the Triassic period, Spain

Albert Lleal / Brittlestar (Stephanouropsis moralejai) fossil of the Triassic period, Spain

Albert Lleal / Fish (Alcoveria brevis) fossil from the Triassic period, Spain

Albert Lleal / Brachipod (Lingula tenuissima) fossils from the middle Triassic period, Spain

Albert Lleal / Ammonite (Platiknemiceras bassei) fossil of the Triassic period, Tarragona, Spain

Albert Lleal / Cockroach (Artitocoblatta colominasi) fossil from the Triassic period, life size, Spain

Albert Lleal / Ophiurid (Aspidura montserratensis) echinoderm fossil from the Triassic period, life size, Spain

Pete Oxford / Abstract view of painted cliffs, Triassic sandstone 210-250myo, Maria Island, Tasmania, Australia

Pete Oxford / Painted cliffs, Triassic sandstone 210-250myo, Maria Island, Tasmania, Australia

Pete Oxford / Painted cliffs Triassic sandstone 210-250myo, Maria Island, Tasmania, Australia

Pete Oxford / Painted cliffs Triassic sandstone 210-250myo, Maria Island, Tasmania, Australia

Daniel Gomez / Sedimentary rock formations rich in Triassic fossils, Ischigualasto NR, W Argentina, South America

Daniel Gomez / Sedimentary rock formations rich in Triassic fossils, Ischigualasto NR, W Argentina, south America

John Cancalosi / Petrified logs. Late Triassic Petrified Forest NP. Arizona USA 225 million years before present

Albert Lleal / Hand-beast (Chirotherium barthii), a trace fossil from the early Triassic, Montseny Natural Park, Catalonia, Spain

Paul D Stewart / Landscape of the Triassic coastal environment with reconstructions of dinosaurs and marine reptiles, 'Dr. Schubert's Naturgeschichte - Geologie, Mineralreich, Palaontologie'. Published in Stuttgart 18...

Paul D Stewart / Fossil of Traumatocrinus hsui, a crinoid, Xiaowa formation, Guizhou, China. Calyx and arms about 20 cm. stem could reach over a meter. Late Triassic/early Jurassic. This type of pelagic crinoid attach...

Chris Shields / Illustration of the dinosaur Coelophysis,living in the Late Jurassic / Early Triassic, 203-216 Ma ago.

Kevin Schafer / Fossil imprints of triassic clam shells, Palanderbukta, Svalbard, Norway

Graham Eaton / Fossil Lizard (Keichousaurus hui) from the Triassic period, Guizhou Province, China

Graham Eaton / Outcrop of Triassic age, Sherwood Sandstone on Hilbre Island, the sandstone displays fluvial cross-bedding due to deposition in a river, off West Kirby, Wirral, UK. January, 2021.

Chris Mattison / Rock strata on Aust cliff, a rich source of Triassic fossils, bordering the eastern bank of the River Severn, South Gloucestershire, UK. August.

Graham Eaton / An outcrop of Triassic age, Sherwood sandstone on Hilbre Island, off West Kirby, Wirral, UK. January, 2021.

Graham Eaton / An outcrop of Triassic age, Sherwood sandstone on Hilbre Island, off West Kirby, Wirral, UK. January, 2021.

Graham Eaton / Charley's Garden Rock, sea stack of triassic sandstone. Seaton Sluice, near Whitley Bay, Tyneside, England, UK. December 2019.

Graham Eaton / Conglomerate rock at unconformity between Carboniferous limestone and Triassic sandstone. Sully, South Glamorgan, Wales, UK. September 2018.

John Cancalosi / Leesburg limestone conglomerate rock. Fragments of Paleozoic limestone, dolomitic limestone, quartzite, quartz, schist, slate, and greenstone in matrix cemented by calcite formed in a Triassic half-gr...

John Cancalosi / Fossil fish (Ameopsis lepidota) from the Upper Triassic period. Solnhofen, Germany

John Cancalosi / Fossil Reptile (Keichousaurus hui) from the Triassic period. China. Family Pachypluerosauridae.