Lmst

#Fossil Discovery Rewrites Global #Dinosaur History https://www.sciencealert.com/fossil-discovery-rewrites-global-dinosaur-history paper: https://academic.oup.com/zoolinnean/article/203/1/zlae153/7942678

"Ahvaytum bahndooiveche is now the oldest-known dinosaur from #Laurasia, the Northern Hemisphere land mass of the late Paleozoic supercontinent #Pangea... That age places it in a similar time period to #dinosaurs of Pangea's Southern Hemisphere land mass, #Gondwana, which were thought to be the world's first by a long shot."

artistic reconstruction of a small bipedal dinosaur in a horsetail forest among large salamander-like animals

These Revolutionary Maps Are Revealing Earth’s Geological Secrets
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https://www.zmescience.com/science/tectonic-model-beatiful-new/ <-- shared technical article
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https://doi.org/10.1016/j.earscirev.2022.104069 <-- shared paper
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#GIS #spatial #mapping #tomography #geology #remotesensing #structuralgeology #plates #platetectonics #earth #global #model #modeling #opendata #opensource #spatialdata #vector #platemodel #mechanics #GPS #earthquakes #volcanoes #topography #orogeny #tectonics #spatiotemporal #spatialanalysis #Pangea #Gondwana #Gondwanaland #ReuniteGondwanaland #Laurasia #lithosphere #crust #mantle #core #geophysics #geochemistry #geochronology #dating #Mesoproterozoic

map - tectonic plates and geologic processes

map - Models of the Capricorn Plate and associated Mid-Indian deformation zone.

map - Magnetic anomaly map of southern Africa overlaying topographic relief. The WDMAM_V2 magnetic model has a pixel size of 1.5 minutes, which is approximately 2.8 km at the equator. The model is created from shiptrack, airborne and satellite datasets resulting in variable resolution that is evident in this image and affects the accuracy of province boundaries.

maps - map of the last orogenic event to affect a province. The colors are approximately related to the age of the orogenic event. The points show locations of observed and estimated metamorphic ages

Study shows #orchids emerged in northern hemisphere and thrived alongside #dinosaurs for 20 million years https://phys.org/news/2024-02-orchid-family-emerged-northern-hemisphere.html

The origin and speciation of orchids https://nph.onlinelibrary.wiley.com/doi/10.1111/nph.19580

"they were previously thought to have emerged on the #supercontinent #Gondwana, in what is present-day #Australia. However, the new study indicates their common ancestor may have originated in the northern hemisphere, on the supercontinent #Laurasia, before spreading out further into the world."

Fossil of Giant #Triassic #Amphibian Unearthed in Brazil
https://www.sci.news/paleontology/kwatisuchus-rosai-12636.html

Interrelationships among Early Triassic faunas of Western #Gondwana and #Laurasia as illuminated by a new South American benthosuchid temnospondyl https://anatomypubs.onlinelibrary.wiley.com/doi/10.1002/ar.25384

"Named #Kwatisuchus rosai, the #animal was approximately 1.5 m in length. It belonged to #Benthosuchidae, a small group of giant #crocodile-like #amphibians that lived during the Triassic. They were primarily aquatic, living in rivers and lakes."

An artist’s impression of Kwatisuchus rosai. By Márcio Castro. The animal looks like an amphibian version of a crocodile.

Wwwwoooaaaa!! In 3 Größen Kontinentbingo spielen #Pangea, #Gondwana, #Laurasia und heute! Geil! Von einem #Ukraine basierten Unternehmen. https://www.kickstarter.com/projects/impressive-planet/drift-of-the-continents-transformer-3-in-1

Now the more #riebeckite facies of the #Paleozoic #Quincy #Granite

The Quincy granite was a prized architectural stone, most famously used in the #BunkerHill Monument in #Boston #Massachusetts. Current dating suggests it was intruded into #Avalonia before it glommed onto #Laurentia as #Laurasia and #Pangea were assembled. Today’s #photo set comes from a walk around the eponymous Bunker Hill Quarry. I’ll post more about the history later. Captions!
#Fujifilm #XH1 #igneous #intrusive #NewEngland

A wide trail runs atop a curving platform about 5 to 10 meters above the terrain. Though it is wooded, there are no large, mature trees because this was a quarry site. The platform was likely an access to higher quarries, possibly a railbed. My photo.

Young woodland covering recent quarry site, dominated by oaks on this outcrop of Quincy Granite. My photo.

A slightly weathered face of Quincy Granite, with euhedral dark amphiboles and some feldspars, and anhedral quartz. Scale card and white reference at upper right, the view is about 20 centimeters wide and high. My photo.

A close up photo of a relatively fresh face of the riebeckite facies of Quincy Granite. The blue amphibole that gives the granite its prized hue is visible, along with abundant blade-shaped darker amphiboles. Parts of the image are blurred because the face is rugose and this close up has very limited depth of field. Scale card and white reference at bottom of photo, image area is about 5 centimeters wide and high. My photo.

#Paleontologists Discover New Species of #Dinosaur-Era Bird https://www.sci.news/paleontology/yatenavis-ieujensis-11504.html

New enantiornithine #bird from the the uppermost #Cretaceous of southern #Patagonia, #Argentina https://www.sciencedirect.com/science/article/abs/pii/S0195667122003160

#Yatenavis shares morphological features with Late Cretaceous #enantiornithines found at diverse localities, including #Madagascar, North America, Patagonia, and #CentralAsia. This may indicate the presence of an enantiornithine subclade widely distributed across #Gondwana and #Laurasia.

#Laurasia

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